Sunny Tower ST6US - Solar Panels
Sunny Tower ST6US Mounting Frame for utility interactive Inverter
Installation Guide
Version 1.1
ST6US-IUS092011 98-2000811
Copyright © 2009 SMA America, Inc. All rights reserved. No part of this document may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA America, Inc. SMA America makes no representations, express or implied, with respect to this documentation or any of the equipment and/or software it may describe, including (with no limitation) any implied warranties of utility, merchantability or fitness for any particular purpose. All such warranties are expressly disclaimed. Neither SMA America nor its distributors or dealers shall be liable for any indirect, incidental or consequential damages under any circumstances. (The exclusion of implied warranties may not apply in all cases under some statutes, and thus the above exclusion may not apply.) Specifications are subject to change without notice. Every attempt has been made to make this document complete, accurate and up-to-date. Readers are cautioned, however, that SMA America reserves the right to make changes without notice and shall not be responsible for any damages, including indirect, incidental or consequential damages, caused by reliance on the material presented, including, but not limited to, omissions, typographical errors, arithmetical errors or listing errors in the content material. SMA America, Incorporated 4031 Alvis Court Rocklin, CA 95677 Tel. +1 916 625 0870 Fax +1 916 625 0871 www.SMA-America.com
SMA Technologie AG
IMPORTANT SAFETY INSTRUCTIONS *SAVE THESE INSTRUCTIONS* This manual contains important instructions for the Sunny Tower ST6US that must be followed during the installation, operating and maintenance of the system. The Sunny Tower ST6US is designed and tested according to international safety requirements, but as with all electrical and electronic equipment, certain precautions must be observed when installing and/or operating the Sunny Tower ST6US. To reduce the risk of personal injury and to ensure the safe installation and operation of the Sunny Tower ST6US, you must carefully read and follow all instructions and warnings in this Installation Guide.
Safety and Hazard Symbols This symbol is used to call attention to important information that you must have when installing and/or operating the Sunny Tower ST6US. Failure to read and follow instructions marked with this symbol could result in serious injury or death and/or damage to the equipment.
Warnings WARNING: A warning describes a hazard to equipment or to personnel. It calls attention to a procedure or practice, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the SMA equipment and/or other equipment connected to the SMA equipment or personal injury. Warnings and cautions may also be accompanied by one or more of the safety and hazard symbols described above to indicate the type of hazard described therein.
Other Symbols In addition to the safety and hazard symbols described above, the following symbol is also used in this Installation Guide. This symbol indicates a fact that is important for optimum operation of the product. Read these sections carefully to ensure optimum operation of your product.
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General Warnings All electrical installation must be done by qualified personnel and in accordance with the National Electrical Code ANSI/NFPA 70, local building codes, and the requirements of the authority having jurisdiction. The Sunny Tower ST6US contains no user serviceable parts, for repair and maintenance always refer to qualified service personnel
Before installing or using the Sunny Tower ST6US, read all of the instructions, cautions and warnings on the Sunny Tower ST6US, the PV array, and this Installation Guide. Before connecting the Sunny Tower ST6US to the electrical utility grid, contact the local utility company. This connection must be made only by qualified personnel. PV arrays produce electrical energy when exposed to light and thus can create an electrical shock hazard. Wiring of the PV arrays should be performed by qualified personnel CAUTION Risk of electrical shock! Normally grounded conductors may be ungrounded and energized when a ground fault is indicated.
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Table of Contents
Table of Contents 1 1.1 1.2 1.3
Notes on this Manual. . . Validity . . . . . . . . . . . . . . Target Group . . . . . . . . . . Explanation of the Symbols
2 2.1 2.2 2.3 2.4 2.5
The Sunny Tower ST6US . Appropriate Usage. . . . . . . Device Overview . . . . . . . . Dimensions . . . . . . . . . . . . Name Plate . . . . . . . . . . . . WebBoxTowerUS. . . . . . . .
3 3.1 3.2
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . 15 Handling of the Sunny Tower ST6US . . . . . . . . . . . 15 Installer‘s Responsibilities . . . . . . . . . . . . . . . . . . . . 16
4 4.1 4.2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Required Tools and Materials . . . . . . . . . . . . . . . . 19 Installing the Sunny Tower ST6US . . . . . . . . . . . . . 19
4.2.1 4.2.2
Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 Minimum Workspace/Ventilation Requirements. . . . . . . . . . . . .20
4.3
Removing from the Pallet . . . . . . . . . . . . . . . . . . . . 20
4.4 4.5
Carrying the Sunny Tower ST6US . . . . . . . . . . . . . 20 Installing at the Location . . . . . . . . . . . . . . . . . . . . 21
5 5.1 5.2 5.3 5.4
Opening and Closing the Sunny Tower ST6US. . Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . Opening the Sunny Tower ST6US . . . . . . . . . . . . . Closing the Sunny Tower ST6US . . . . . . . . . . . . . . Opening and Closing the SB 7000US/SB 6000US .
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23 23 23 24 24 5
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6 6.1 6.2
Attaching the Conduits . . . . . . . . . . . . . . . . . . . . 25 Insert cables from the rear into the Sunny Tower . . . 25 Insert cables from below into the Sunny Tower . . . . 26
7 7.1 7.2 7.3 7.4 7.5
Electrical Connection . . . . . . . . . . . . . . . . . . . . . Connecting Ground . . . . . . . . . . . . . . . . . . . . . . . Connecting the AC Output . . . . . . . . . . . . . . . . . . Connecting the DC Input . . . . . . . . . . . . . . . . . . . . Installing the inverters on the Sunny Tower ST6US . . Wiring Connections to the SB6000US / SB7000US
7.5.1 7.5.2
AC Wiring of the SB 7000US/6000US . . . . . . . . . . . . . . . . . .36 DC Wiring of the SB 7000US/6000US . . . . . . . . . . . . . . . . . .38
8 8.1 8.2 8.3
Communication . . . . . . . . . . . . . . . . . . . . . External Communication device . . . . . . . . . . . Connecting another Sunny Tower ST6US . . . . Optional Sunny WebBoxTowerUS Installation .
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Commissioning the Sunny Tower ST6US . . . . . . 47
10
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . 49
10.1 10.2
Sunny Tower ST6US with Sunny Boy SB7000US . . . 49 Sunny Tower ST6US with Sunny Boy SB6000US . . . 51
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Contact. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
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29 30 31 32 34 34
41 42 43 44
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Notes on this Manual
1 Notes on this Manual 1.1 Validity This installation guide covers the correct installation and commissioning of a Sunny Tower ST6US.
1.2 Target Group Only trained electricians approved by the responsible energy supply company may install and commission a Sunny Tower ST6US. The instructions assume that you, the installer, are familiar with electrical installations and know the corresponding rules and regulations.
1.3 Explanation of the Symbols Used This symbol indicates a fact which, if not observed, could result in damage to components or represent a danger to persons. Please read these sections especially carefully. This symbol indicates a fact that is important for optimum operation of the product. Read these sections carefully to ensure optimum operation of your product.
This symbol indicates an example.
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Notes on this Manual
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The Sunny Tower ST6US
2 The Sunny Tower ST6US 2.1 Appropriate Usage The Sunny Tower ST6US is a mounting frame which enables you to easily install six inverters of type SB 7000US or SB 6000US. The AC and DC cabling is pre-wired, as is the communication via RS485, and the AC/DC Disconnect. An optional Sunny WebBox can be installed to allow remote monitoring of the PV plant via an internet connection. The Sunny Tower ST6US is delivered with a base plate for easy installation. Do not use the Sunny Tower ST6US for purposes other than those described here. the connection of voltage sources other than solar modules may damage the inverters. Alternative uses, modifications, as well as installing components not recommended or sold by SMA Technologie AG may void the warranty and any applicable interconnection agreements.
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The Sunny Tower ST6US
SMA Technologie AG
2.2 Device Overview The following figures provide you with an overview of the Sunny Tower ST6US and the arrangement of the SB6000US / SB7000US inverters on the Sunny Tower ST6US, as well as the rear view:
louvers
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The Sunny Tower ST6US
SMA America Inc. phone: 530.273.4896 www.sma-america.com
ST6US Mounting Frame for utiliy interactive inverter
Serial Number: 0000000001
SMA Technologie AG Hannoversche Straße 1 - 5 34266 Niestetal Germany Date of manufacture 05/2007
Max. continuous output Power* AC 42 kW
Range of input operating voltage DC 250 - 600 Vdc
voltage range (Vac)* AC Operating MIN NOMINAL MAX
Range of operating DC voltage* DC MPPT 250 - 480 Vdc
183 211 244
229 (Line to Line) 264 (Line to Line) 305 (Line to Neutral)
208 240 277
Operating frequency range (Hz) AC MIN NOMINAL MAX 59.3
AC Output power factor 1
Max. operating current DC 180 A (6 x 30 A) ENCLOSURE
Type 3R (IP54)
60.5
60.0
continous output current AC 3Max. x 117 A
Temperature ambient +113°F Grid type 3 phase
* For more details see the Operator´s Manual
(1) SB 2 SB 3
SB 1
2
SB 5 SB 4
SB 6 3
(1) AC/DC Disconnect
(2) Service Access Cover (3) Conduit Access/Mounting plate
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The Sunny Tower ST6US
2.3 Dimensions 35.07
~ 57.24
~ 25.75
71.3
~ 27.4
40.55
35.07
19.84
20.59
19.69
40.55 Dimensions are in inches
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The Sunny Tower ST6US
2.4 Name Plate You can identify the Sunny Tower ST6US with the aid of the name plate. The name plate is found on the back side (visible above the service access cover).
2.5 WebBoxTowerUS The WebBoxTowerUS is a communication option available from SMA America Inc. It enables remote communication with the Sunny Tower ST6US. The Sunny WebBox power supply is available in 2 voltage ranges, one version for voltages between 120 Vac and 240 Vac, the second version for 480 Vac. Verify that you have the correct version for the utility voltage prior to commissioning the Sunny Tower ST6US. Communication via RS485 is pre-wired as a standard feature.
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The Sunny Tower ST6US
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Installation Guide
SMA Technologie AG
IMPORTANT SAFETY INSTRUCTIONS
3 IMPORTANT SAFETY INSTRUCTIONS Save these instructions! This manual contains important instructions for model(s) ST6US that shall be followed during installation and maintenance of the power system.
3.1 Handling of the Sunny Tower ST6US The Sunny Tower ST6US has a weight of approximately 330 Ibs (without SB6000US / SB7000US). Four people must carry the unit, or a suitable transport trolley must be used. Always wear personal protective equipment (protective clothing, gloves, safety boots) to reduce risk of injury! Follow the instructions in the diagrams, signs and labels on each inverter and ensure that they are legible at all times.
Do not install the Sunny Tower ST6US •
on flammable construction materials
•
in areas where highly flammable materials are stored
•
in potentially explosive areas
Open and close the Sunny Tower ST6US only as described in section 5 “Opening and Closing the Sunny Tower ST6US” (Page 21) and follow the safety instructions listed there. Work on the Sunny Tower ST6US with the cover removed must be carried out by a qualified electrician. High voltages are present in the device. Before working on the Sunny Tower ST6US with the cover removed, AC and DC voltage MUST be disconnected from the Sunny Tower ST6US. When working on the Sunny Tower ST6US and handling the assemblies, remember to observe all ESD safety regulations. Electronic components are susceptible to electrostatic charge. Discharge any electrostatic charge by touching the grounded housing before handling any electronic component.
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IMPORTANT SAFETY INSTRUCTIONS
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Guarantee that the louvers of the Sunny Tower ST6US are not covered. There is the danger of an accumulation of heat!
The temperature of individual parts of the case and of components inside the SB 7000US/SB 6000US can reach more than 60 °C (140 °F). Touching these parts could result in severe burns. The Sunny Tower must be securely fastened to the floor prior to installing and connecting the inverters.
Note that the roof of the Sunny Tower ST6US protrudes at a height of approximately 70.87“!
General safety rules for working on photovoltaic systems: 1.
Disconnect Before you start to work on the Sunny Tower ST6US, disconnect all wires which could carry voltage to the area you are working on!
2.
Protect against reenergizing. To prevent the device from being reenergized ensure that you block or lock it.
3.
Test each unit to ensure that all voltages have been removed. Use a voltmeter to ensure that the unit is completely deenergized.
3.2 Installer‘s Responsibilities Each person working on an electrical device is responsible for the safety of all persons involved and for the safety of the device.
Always be sure to observe all standards and regulations applicable to the installation and site.
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IMPORTANT SAFETY INSTRUCTIONS
This installation guide, the operating manual and the documentation of installed components must be kept in the immediate vicinity of the Sunny Tower ST6US, and must be available to installation, operation, maintenance and service staff at all times. The Sunny Tower ST6US should only be used when it is safe to do so. All safety features must be accessible at all times and their correct operation should be regularly tested. Read this installation guide carefully and be sure to observe and understand all safety regulations when installing and commissioning the system. You must also observe and understand all connection requirements of the local energy supplier and all applicable national codes and standards for installation of this equipment of the local energy supplier and all applicable national provisions of the country in which the system is installed. This information regarding operational safety refers to the regulations of the European Union valid at the time the Sunny Tower ST6US was produced. The installer is obliged to make sure that the mentioned safety measures comply with the regulations valid at the time and to observe new regulations when installing the Sunny Tower ST6US and the inverters. Outside the European Union, the laws on occupational safety applicable in the deployment location of the device and the respective national requirements must be adhered to. In addition to the work safety measures described in this installation guide, the general safety and accident prevention regulations which apply where the Sunny Tower ST6US is installed and the valid environmental protection regulations must be observed and followed. Follow all instructions in this installation guide completely and without restrictions!
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IMPORTANT SAFETY INSTRUCTIONS
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Installation Guide
SMA Technologie AG
Installation
4 Installation 4.1 Required Tools and Materials Quantity Tool / Material
Purpose
1
Hammer drill with a suitable drill bit Drilling the holes for the base plate anchors
4
Concrete anchors with a minimum di- Anchor the Sunny Tower base to the ameter of 3/8“ concrete pad
1
Hexagon (allen) key (5 mm)
Attaching the SB6000US / SB7000US wall mount brackets to the Sunny Tower ST6US
4.2 Installing the Sunny Tower ST6US The information contained in the installation guide must be observed when installing the Sunny Tower ST6US. The inverters are designed for installation outdoors, with a NEMA rating of 3R. The Sunny Tower ST6US must be installed in such a manner that the proper electrical connections, adequate ventilation, and adequate fire protection are possible.
4.2.1 Foundation The foundation must guarantee solid and safe positioning of the Sunny Tower ST6US. The foundation must provide the necessary load-carrying capacity to cope with the weight of the Sunny Tower ST6US (the fully equipped Sunny Tower ST6US with six inverters of type SB6000US / SB7000US weighs approximately 1100 Ibs). A foundation slab is recommended for ground-mounted installations. Pouring and structural inspection of the foundation slab should be performed onsite.
When pouring the foundation, keep in mind that the cables and conduits should enter the Sunny Tower ST6US from underneath. Therefore, suitable conduits or cable feedthroughs should be installed prior to pouring.
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Installation
4.2.2 Minimum Workspace/Ventilation Requirements Due to NEC 110.26 Work Space Requirements, a minimum of 36" of free space must be maintained around all four sides of the Sunny Tower ST6US.
4.3 Removing from the Pallet Ensure that you use the pre-installed carrying handles when removing the Sunny Tower ST6US from the pallet and moving it into place.
4.4 Carrying the Sunny Tower ST6US The Sunny Tower ST6US weighs 330 Ibs, four people must carry the Sunny Tower ST6US! It is imperative that you use the pre-installed carrying handles! Always wear personal protective equipment (protective clothing, gloves, safety boots) to avoid the danger of injuries.
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Installation
4.5 Installing at the Location ,
The Sunny Tower ST6US must stand absolutely securely (i.e. be installed) before you begin with the installation and cabling of the inverters.
The Sunny Tower ST6US must be installed on a level surface. Any existing unevenness, depressions, or slope must be corrected prior to installation.
Proceed as follows: 1.
Mark the positions of the base plate mounting holes on the mounting surface.
2.
At the marked positions, drill the holes for the anchor screws.
3.
Insert the concrete anchors in the drilled holes.
4.
Tightly screw the Sunny Tower ST6US in place.
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Installation
Once the Sunny Tower ST6US is secured, remove the carrying handles by unscrewing the stainless steel screws. Be sure to keep the screws, as they will be needed later for installation of the inverter mounting brackets.
For conduit hubs, use only UL listed rainthight, or wet location hubs for entry into the enclosure.
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Opening and Closing the Sunny Tower ST6US
5 Opening and Closing the Sunny Tower ST6US 5.1 Safety Instructions Components inside the Sunny Tower ST6US can reach more than 60 ºC (140 ºF) touching these components could lead to serious burns.
Work on the Sunny Tower ST6US must be completed only by a qualified electrician! High voltages are present in the device. Before working on the Sunny Tower ST6US disconnect AC and DC voltages sources from the Sunny Tower ST6US.
5.2 Opening the Sunny Tower ST6US 1.
Loosen the ten screws on the service access cover on the rear side of the Sunny Tower ST6US.
2.
Store the service access cover (2), mounting screws and washers in a safe place while mounting, installing or repairing the Sunny Tower ST6US.
3.
Remove the four screws that secure the conduit access/mounting plate to the rear of the Sunny Tower ST6US
4.
Store the conduit access/mounting plate (3), mounting screws and washers in a safe place while mounting, installing or repairing the Sunny Tower.
SMA America Inc. phone: 530.273.4896 www.sma-america.com
ST6US Mounting Frame for utiliy interactive inverter
Serial Number: 0000000001
SMA Technologie AG Hannoversche Straße 1 - 5 34266 Niestetal Germany Date of manufacture 05/2007
Max. continuous output Power* AC 42 kW
Range of input operating voltage DC 250 - 600 Vdc
voltage range (Vac)* AC Operating MIN NOMINAL MAX
Range of operating DC voltage* DC MPPT 250 - 480 Vdc
183 211 244
229 (Line to Line) 264 (Line to Line) 305 (Line to Neutral)
208 240 277
Operating frequency range (Hz) AC MIN NOMINAL MAX 59.3
AC Output power factor 1
Max. operating current DC 180 A (6 x 30 A) ENCLOSURE
Type 3R (IP54)
60.5
60.0
continous output current AC Max. 3 x 117 A
Temperature ambient +113°F Grid type 3 phase
* For more details see the Operator´s Manual
2
3
You will now have access to the AC and DC distribution terminals inside the Sunny Tower ST6US.
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Opening and Closing the Sunny Tower ST6US
SMA Technologie AG
5.3 Closing the Sunny Tower ST6US 1.
Align the holes in the service cover with the tapped holes in the rear of the Sunny Tower.
2.
Install the ten screws and washers, the teeth of the washers should face the cover to ensure proper grounding of the cover.
3.
Align the holes in the cable feed-through cover with the tapped holes in the rear of the Sunny Tower.
4.
Install the four screws and washers, the teeth of the washers should face the cover to ensure proper grounding of the cover.
5.4 Opening and Closing the SB 7000US/SB 6000US At this point, we ask that you refer to the SB 7000US/SB 6000US installation guide. Information on this subject can be read in the appropriate section.
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Attaching the Conduits
6 Attaching the Conduits In this section you will learn where to insert the cables in the Sunny Tower and where to punch the holes for the conduits. NOTICE! Moisture can seep through incorrect conduits and conduit hubs. Damage to the electronics of the Sunny Tower. •
For conduit hubs, use only UL Listed rainproof, or wet location hubs complying with UL 514B for entry into the enclosure.
•
Adjust the diameter of the conduit hubs to match the diameter of the conduits.
The PV panel cables, the AC cables and the communication cables can be routed into the Sunny Tower from the rear or from below. The two options are described below.
6.1 Insert cables from the rear into the Sunny Tower Insert the solar generator cables, the AC cables and the data cables into the Sunny Tower from the rear. An aluminum sheet is attached to the Sunny Central for this purpose. 1.
Remove the four screws that secure the conduit access/mounting plate to the rear of the Sunny Tower.
2.
Store the conduit access/mounting plate (3), mounting screws and washers in a safe place while mounting, installing or repairing the Sunny Tower.
3.
Mark all the holes for the conduits. You need one conduit for the AC cables (minimum), one conduit for the communication cables and one conduit for the DC cables (minimum).
4.
Punch holes for the conduits.
Figure to the right: Example for a plate with conduits. A: Conduit for AC cables. B: Conduit for communication cables. C: Conduit for DC cables.
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Attaching the Conduits
5.
Attach the plate to the Sunny Tower.
6.
Attach the screws and washers and tighten with a torque of 53 in-lbs.
7.
Insert the conduits into the openings.
8.
Attach the conduits with the appropriate hubs.
9.
Insert the cables into the Sunny Tower.
SMA Technologie AG
The cables are inserted.
6.2 Insert cables from below into the Sunny Tower Insert the solar generator cables, the AC cables and the data cables into the Sunny Tower from the bottom through the foundation. There are four openings in the base of the Sunny Tower through which the cables can be inserted into the Sunny Tower. Two aluminum sheets are attached above the openings. 1.
Remove the six screws that secure the aluminum sheets to the bottom of the Sunny Tower.
2.
Store the aluminum sheets, mounting screws and washers in a safe place.
3.
Place the Sunny Tower with the openings above the cable conduits onto the base.
4.
Fasten the Sunny Tower to the base as described in section 4.5 „Installing at the Location”.
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5.
Attaching the Conduits
Seal the Sunny Tower to the base. Without alumi- • num sheet
Seal the openings down to the base.
With aluminum • sheet
Punch holes for the conduits. Figure to the right: Example for plates with conduits. A: Conduit for AC cables. B: Conduit for communication cables. C: Conduit for DC cables.
6.
•
Insert the conduits into the openings.
•
Attach the plate to the bottom of the Sunny Tower.
•
Attach the screws and washers and tighten with a torque of 53 in-lbs.
•
Attach the conduits with the appropriate hubs.
Insert the cables into the Sunny Tower.
The cables are inserted.
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Attaching the Conduits
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Electrical Connection
7 Electrical Connection Save these instructions. This manual contains important instructions for model(s) ST6US, that should be followed during installation and maintenance of the power system. Refer to the table below for the appropriate torque values and wire sizes. Terminal
in. Ibs.
Nm.
Wire Size
Wire type
DC Terminal Blocks (PV-return or PV grounded conductors)
80
9
2 - 6 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
35
3.9
14 - 8 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
19
2.2
10 - 16 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
200
22.6
350 mcm -
600 V minimum rated 90 °C; copper or copper clad conductors only
DC Fuse Holder (PV-hot or PV ungrounded conductors)
3/0 AWG 100
11.4
2/0 - 1 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
80
9
2 - 6 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
35
3.9
8 - 14 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
Primary protective earthing terminal
89
10
2 - 2/0 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
Inverter protective earthing terminal
27
3
14 - 6 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
Cover Screws
53
6
—
—
AC Terminal Blocks
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Electrical Connection
SMA Technologie AG
7.1 Connecting Ground The diagram below shows the equipment grounding terminals of the Sunny Tower ST6US. They are located on the lower right side underneath the DC connections inside the Sunny Tower ST6US. The minimum size for the primary grounding electrode conductor is 6 AWG. The minimum size for the individual inverter grounding electrode conductors is 8 AWG.
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Electrical Connection
7.2 Connecting the AC Output When inserting the fuses provided with the ST6US, you must consider the local grid configuration and voltage! If the Sunny Tower is to be used in a 480/277 volt installation, the fuses for the L2 connections of each inverter must not be installed. These fuse holders are marked with yellow warning labels on the fuse holders inside the Sunny Tower. Maximum Inverter AC output fuse size is 50 A, Fuse must be fast acting Class J (for example: Ferraz A4J50, Bussman JKS-50, Littelfuse JLS-50) Ensure that the Sunny Tower is properly grounded and the bonding of your equipment is in accordance with NEC articles 250 and 690.
Attention: AC-output/neutral is not bonded to ground!
1.
Turn OFF the main breaker in the main utility box.
2.
Ensure that the correct breaker sizes specified in the table below are installed. System
Breaker
6 - SB7000U @ 480/277 V
70 A
6 - SB7000U @ 208/120 V
150 A
6 - SB7000U @ 240 V
125 A
6 - SB6000U @ 480/277 V
60
6 - SB6000U @ 208/120 V
125 A
6 - SB6000U @ 240 V
110 A
Ensure that conductors are sized in accordance with NEC article 310.
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Electrical Connection
SMA Technologie AG
The inscription goes from left to right. Ø
Connection terminal for the grid connection to L1
Ø
Connection terminal for the grid connection to L2
Ø
Connection terminal for the grid connection to L3
N
Connection terminal for the grid connection to N (neutral)
7.3 Connecting the DC Input When connecting the DC conductors from the PV array ensure proper high voltage safety precautions are followed. Before connecting the conductors ensure that an opaque covering is applied to the modules to protect against electric shock.
Make sure that your cable has sufficient length.
1.
Open the fuse switch of each individual safety device.
2.
PV array wiring can enter the tower enclosure from below or through the cable access cover. If necessary use an appropriate knock out punch to create knockouts for the array conduits.
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Electrical Connection
PV array wiring should be fed to string fuse holders shown below. PV string conductors should be supported using the cable tie tabs near the inputs of the fuse holders and terminal blocks.
PV hot SB6
PV return SB6
PV return SB1 PV hot SB1
PV return SB2
PV hot SB5
PV hot SB2
PV return SB5
PV return SB3
PV hot SB4
PV hot SB3
PV return SB4
4.
PV hot (PV ungrounded) conductors should be connected to the fuse holders. PV return (PV grounded) conductors should be connected to the associated terminal blocks. The maximum allowable fuse size for the DC string fuses is 15 amps. Fuse must be fast acting (for example: Ferraz ATM15, Bussman KTK15, Littelfuse KLK15)
15 Amp fuses are provided with the Sunny Tower ST6US. The proper size PV string fuse is determined by 1.56 x Isc (of the PV module) and then rounding up to the next standard fuse size. Example: If the Isc of the PV module = 6.9 Adc then the fuse size is determined by 1.56 x 6.9 = 10.76. The next standard fuse size would be 12A, 600Vdc fuse. WARNING: The string fuse size must not be greater than the maximum fuse size rating of the PV module.
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7.4 Installing the inverters on the Sunny Tower ST6US The Sunny Tower ST6US must be securely fastened to the floor prior to installing and connecting the inverters.
Install the wall brackets for each SB6000US / SB7000US. Proceed as follows: 1.
Hold the wall bracket over the corresponding screw anchor holes.
2.
Fasten the wall bracket using the stainless steel screws (M8 x 16 with corresponding locking washers) provided with the Sunny Tower ST6US.
3.
Perform steps one and two for the remaining five wall brackets. Once the wall brackets are installed refer to the SB6000US / SB7000US manual For further installation instructions.
7.5 Wiring Connections to the SB6000US / SB7000US The AC and DC system cables are already pre-wired to the inverter mounting locations. In addition to this manual, refer to the SB6000US / SB7000US manual for instructions on wiring the AC and DC cables inside the inverters. The AC/DC switch serves to simultaneously disconnect the AC and DC connections. To learn how to connect a SB6000US / SB7000US on the AC side and how to configure the AC voltage of the inverter, please refer to the SB6000US / SB 7000US installation guide. Information on this subject can be read in the appropriate section. The DC input and AC output circuits are isolated from the enclosure and system grounding. If an alternative grounding scheme is required, it is the responsibility of the installer. The Photovoltaic system grounding shall be installed per the requirements of sections 690.41 through 690.47 of the National Electric Code, ANSI/NFPA 70, and is the responsibility of the installer. The National Electrical Code, ANSI / NFPA 70, wiring methods are to be used.
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AC cable
Communication cable DC cable
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Electrical Connection
Refer to the table below for the appropriate torque values and wire sizes. Terminal
in. Ibs.
Nm.
Wire Size
AC & DC Terminal Blocks
18
2
6 - 10 AWG
Unused Terminal Block for AC Configuration
11
1.3
—
Cover Screws
53
6
—
7.5.1 AC Wiring of the SB 7000US/6000US Use the following procedure to connect the AC wires to the Sunny Boy with the AC/DC Disconnect: You must connect the wires that carry the AC voltage from the Sunny Boy to the utility grid in the order described in this procedure. Deviating from this procedure could expose you to lethal voltages that can cause serious injury and/or death. Avoid using wire nuts to join any wires together or to make any connections anywhere in the PV system. Wire nuts are a frequent cause of unreliable, resistive connections, and ground faults. 1.
Connect the white wire of the AC/DC Disconnect to the terminal labeled N and the black wire to the terminal labeled L1 of the Sunny Boy.
2.
For 208/240 V connect the blue wire to the terminal labeled L2 in the Sunny Boy. For 277 V connect the blue wire to the terminal labeled PE in the Sunny Boy (not used).
3.
Connect the wires to the terminal blocks in the Sunny Boy and tighten to a torque of 18 in-lb (2 Nm).
4.
Verify that all connections are correctly wired and properly torqued.
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Electrical Connection
Following figure shows AC Connection Terminals for 208 V and 240 V.
V
V 0V
240
277 V
A B + -
208
2 3 5 7
White wire connected to N terminal Blue wire connected to L2 terminal
Black wire connected to L1 terminal
Following figure shows AC Connection Terminals for 277 V.
V
V 0V
240
277 V
A B + -
208
2 3 5 7
White wire connected to N terminal Black wire connected to L1 terminal Blue wire connected to PE terminal
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Electrical Connection
7.5.2 DC Wiring of the SB 7000US/6000US The Sunny Boy comes from the factory configured for negative ground systems. Certain types of PV modules may require that the positive terminal be grounded instead of the negative terminal. To configure the Sunny Boy for positive ground, move the fuse (1) and change the jumper position (2) as shown in the following illustrations. Following figure shows GFDI Fuse and Jumper Settings for Negative Ground.
2 1
Following figure shows GFDI Fuse and Jumper Settings for Positive Ground.
2
1
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Electrical Connection
Negative Grounding Following figure shows the DC Connection with negative grounding.
V
V 0V
240
277 V
A B + -
208
2 3 5 7
Black wire (PV HOT) connected to DC+ White wire (PV RETURN) connected to DCAvoid using wire nuts to join any wires together or to make any connections anywhere in the PV system. Wire nuts are a frequent cause of unreliable connections, resistive connections, and ground faults. Use the following procedure to connect the DC wires to the Sunny Boy: 1.
Connect the black wire (PV HOT) to the terminal labeled DC+ in the Sunny Boy.
2.
Connect the white wire (PV RETURN) to the terminal labeled DC- in the Sunny Boy.
3.
Torque all wires in the terminal blocks inside the Sunny Boy to 18 in-lb (2 Nm).
4.
Verify that all connections are correctly wired and properly torqued.
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Electrical Connection
Positive Grounding Following figure shows the DC Connection with positive grounding.
V
V
0V
240
277 V
A B + -
208
2 3 5 7
White wire (PV Return) connected to DC+ Black wire (PV HOT) connected to DC-
Avoid using wire nuts to join any wires together or to make any connections anywhere in the PV system. Wire nuts are a frequent cause of unreliable connections, resistive connections, and ground faults. 5.
Connect the white wire (PV RETURN) to the terminal labeled DC+ in the Sunny Boy.
6.
Connect the black wire (PV HOT) to the terminal labeled DC- in the Sunny Boy.
7.
Torque all wires in the terminal blocks inside the Sunny Boy to 18 in-lb (2 Nm).
8.
Verify that all connections are correctly wired and properly torqued.
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Communication
8 Communication The communication cables should be run in a separate conduit / raceway and be isolated from the power lines! Information in this section is further explained in the SB6000US / SB7000US manual as well as the Sunny WebBox manual.
The Sunny Tower ST6US comes pre-wired for RS-485 communication.
You must connect the communication cables in the individual SB6000US / SB7000US, and connect other bus participants with the communication distributor. For information how to connect the communication cables to the Sunny Boy, see the installation guide of the Sunny Boy. The communication distributor is situated inside the Sunny Tower ST6US. To ensure communication with the optional WebBoxTowerUS you must connect the communication wire to each installed SB6000US / SB7000US. Additional Connections are made to the communications termination bus inside the Sunny Tower ST6US. For further information please see the appropriate manual.
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Communication
8.1 External Communication device To connect an external communication device to the communications bus of the Sunny Tower ST6US simply connect the RS485 cable to the RJ45 socket as you can see below. External communication device
For additional bus participant or termination resistor
Pin configuration from RJ45-plug: PIN 1= Data
screen
PIN 3= Data +
8
1
42
-
PIN 2= GND
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Communication
8.2 Connecting another Sunny Tower ST6US
SMA America Inc. phone: 530.273.4896 www.sma-america.com
ST6US Mounting Frame for utiliy interactive inverter
Serial Number: 0000000001
Range of input operating voltage DC 250 - 600 Vdc MPPT Range of operating DC voltage* DC 250 - 480 Vdc
183 211 244
59.3
229 (Line to Line) 264 (Line to Line) 305 (Line to Neutral)
208 240 277
ENCLOSURE
SMA Technologie AG Hannoversche Straße 1 - 5 34266 Niestetal Germany
Range of input operating voltage DC 250 - 600 Vdc MPPT Range of operating DC voltage* DC 250 - 480 Vdc
183 211 244
59.3
229 (Line to Line) 264 (Line to Line) 305 (Line to Neutral)
208 240 277
Max. operating current DC 180 A (6 x 30 A) ENCLOSURE
Type 3R (IP54)
60.5
60.0
continous output current AC 3Max. x 117 A
AC Output power factor
Grid type 3 phase
Date of manufacture 05/2007
Max. continuous output Power* AC 42 kW Operating voltage range (Vac)* AC MIN NOMINAL MAX
Operating frequency range (Hz) AC MIN NOMINAL MAX
Type 3R (IP54)
Temperature ambient +113°F
1
Temperature ambient +113°F Grid type 3 phase
* For more details see the Operator´s Manual
* For more details see the Operator´s Manual
Sunny Tower ST6US 1
RJ45 socket for WebBoxTowerUS or external communication device
ST6US Mounting Frame for utiliy interactive inverter
Serial Number: 0000000001
Max. operating current DC 180 A (6 x 30 A)
60.5
60.0
AC Output power factor 1
SMA America Inc. phone: 530.273.4896 www.sma-america.com
SMA Technologie AG Hannoversche Straße 1 - 5 34266 Niestetal Germany Date of manufacture 05/2007
Max. continuous output Power* AC 42 kW Operating voltage range (Vac)* AC MIN NOMINAL MAX
Operating frequency range (Hz) AC MIN NOMINAL MAX continous output current AC 3Max. x 117 A
Sunny Tower ST6US 2
connection of next Sunny Tower ST6US
termination resistor location
If you would like to connect an additional Sunny Tower ST6US, please complete the following. 1.
Remove and save the bus termination resistor in the first Sunny Tower ST6US.
2.
In it´s place, connect a patch cable (RJ45 plug).
3.
Route this cable to the second Sunny Tower ST6US
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Communication
4.
SMA Technologie AG
In the second Sunny Tower ST6US place the bus termination resistor in the appropriate RJ45 socket, if not already present.
8.3 Optional Sunny WebBoxTowerUS Installation The optional Sunny WebBoxTowerUS is installed inside of the Sunny Tower ST6US. The communication cables from the WebBoxTowerUS to each SB6000US / SB7000US are already pre-installed. Proceed as follows: 1.
Remove the clear cover of the WebBoxTowerUS housing.
2.
Remove the square plug of the cable entry in the WebBoxTowerUS housing.
3.
Place the square plug over the Ethernet cable.
4.
Insert the square plug with the Ethernet cable into the cable entry of the WebBoxTowerUS housing.
5.
Attach the Ethernet cable to the WebBoxTowerUS.
6.
Install the clear cover on the WebBoxTowerUS housing.
Route the Ethernet cable parallel to the communication lines, further into the right front corner, then downward to the cable entry of the Sunny Towers. The connection of the communication cable to the SB6000US / SB7000US is described in detail in the SB6000 / SB7000US documentation. Please read the appropriate section of that documentation.
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Communication
WebBoxTowerUS 120–240 V version
RS485 cable to communication distribution
Installation Guide
AC-cable to Sunny Tower ST6US
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Communication
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WebBoxTowerUS 480 V version
RS485 cable to communication distribution
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Commissioning the Sunny Tower ST6US
9 Commissioning the Sunny Tower ST6US Proceed with commissioning the Sunny Tower ST6US only after: •
the housing covers on the SB6000US / SB7000US inverters are closed.
•
the DC cables (PV strings) are fully connected.
•
the AC (power) cable is connected.
•
all conduit fittings are secured.
Commissioning Procedure If you turn the AC/DC Disconnect switches from "1" (on) to "0" (off) you will disconnect the AC and DC voltage from the inverter. Grid feeding mode is interrupted. "1" (on): AC and DC power is connected to the inverter. "0" (off): AC and DC power is disconnected to the inverter. Make sure that all AC/DC switches are set to "0" (off).
1.
Switch on the breaker of your AC distribution panel, connecting the Sunny Tower to the grid. Verify the correct voltage range at the grid connection terminals, (see section 6.2) 208 V or 240 V or 277 V/480 V.
2.
Depending on AC voltage range insert both fuses ( 208 V or 240 V) or one fuse (277 V /480 V) into the fuse holders located above the grid connection terminals in the Sunny Tower ST6US. When inserting the fuses provided with the ST6US, you must consider the local grid configuration and voltage! If the Sunny Tower is to be used in a 480/277 volt installation, the fuses for the L2 connections of each inverter must not be installed. These fuse holders are marked with yellow warning labels on the fuse holders inside the Sunny Tower. Maximum Inverter AC output fuse size is 50 A, Fuse must be fast acting Class J (for example: Ferraz A4J50, Bussman JKS-50, Littelfuse JLS-50).
3.
Ensure all DC string fuse holders are closed. The maximum allowable fuse size for the DC string fuses is 15 amps. Fuse must be fast acting (for example: Ferraz ATM15, Bussman KTK15, Littelfuse KLK15).
4.
Install the rear covers on the Sunny Tower ST6US.
5.
One after another switch on the AC/DC switch of each SB 7000US/SB 6000US to "1" (on).
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Commissioning the Sunny Tower ST6US
6.
SMA Technologie AG
Check the green LED on each SB6000US / SB7000US, to ensure that each one is operating correctly. If the SB6000US / SB7000US displays other messages or blink codes, refer to the appropriate manual for trouble shooting information.
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Technical Data
10 Technical Data 10.1 Sunny Tower ST6US with Sunny Boy SB7000US The data listed here applies for a Sunny Tower ST6US equipped with six inverters of type SB 7000US. 4
Description
Short de- Setting scr.
Input data Max. DC input power
52 kW (STC)
DC voltage range
250 V - 600 V
Max. DC voltage
UDC, max 600 V
Max. input current
IPV, max
6 x 30 A
Max. no. of strings (parallel)
24 (4 per Inverter)
Thermally monitored varistors
yes
Ground fault monitoring
yes
Reverse polarity protection
yes
Output data Continuous AC output power
PAC, max
42 kW at 40 °C
Nominal AC output
PACnom
42 kW
Max. output current
IAC, max
208 V : 3 x 117 A (3-pole 150 A) 240 V : 3 x 101 A (3-pole 125 A) 480 V : 3 x 51 A (3-pole 70 A)
Harmonic distortion of nominal current Nominal AC voltage
98 %
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Technical Data
Description
Short de- Setting scr.
CEC rebate
ηeuro
96 %
Grid monitoring (UL 1741)
grid guard
Number of supply phases
3
Housing Protection degree
NEMA Type 3R
Cooling concept
OptiCool
Permissible ambient temperature
-13 °F to + 113 °F ( -25 °C to +45 °C)
Mechanical data Weight with inverter
approx. 1115 Ibs. (approx. 500 kg)
Dimensions (W x H x D)
40.55“ x 71.3“ x 35.07“
Features System monitoring
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Technical Data
10.2 Sunny Tower ST6US with Sunny Boy SB6000US The data listed here applies for a Sunny Tower ST6US equipped with six inverters of type SB 6000US. Description
Short de- Setting scr.
Input data Max. DC input power
45 kW (STC)
DC voltage range
250 V - 600 V
Max. DC voltage
UDC, max 600 V
Max. input current
IPV, max
6 x 30 A
Max. no. of strings (parallel)
24 (4 per Inverter)
Thermally monitored varistors
yes
Ground fault monitoring
yes
Reverse polarity protection
yes
Output data Continuous AC output power
PAC, max
36 kW at 40 °C
Nominal AC output
PACnom
36 kW
Max. output current
IAC, max
208 V : 3 x 100 A (3-pole 125 A) 240 V : 3 x 87 A (3-pole 110 A) 480 V : 3 x 43 A (3-pole 60 A)
Harmonic distortion of nominal current Nominal AC voltage
98 %
CEC rebate
ηeuro
96 %
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Technical Data
Description
Short de- Setting scr.
Grid monitoring (UL 1741)
grid guard
Number of supply phases
3
Housing Protection degree
NEMA Type 3R
Cooling concept
OptiCool
Permissible ambient temperature
-13 °F to + 113 °F ( -25 °C to +45 °C)
Mechanical data Weight with inverter
approx. 1115 Ibs. (approx. 500 kg)
Dimensions (W x H x D)
43“ x 71“ x 39“
Features System monitoring
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Contact
11 Contact If you have any questions or technical problems concerning the Sunny Tower ST6US, contact our technical support. Please have the following information available when you contact SMA: •
Serial number of the Sunny Tower ST6US
•
Type of inverters and modules connected, and number of modules
•
Communication method
•
Blink codes or display messages of the connected inverters
Address: SMA America, Incorporated 4031 Alvis Court Rocklin, CA 95677 Tel. +1 916 625 0870 Fax +1 916 625 0871 [email protected] www.SMA-America.com
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Legal Restrictions
54
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Installation Guide
4.""NFSJDB *ODPSQPSBUFE
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Installation Guide
Version 1.1
ST6US-IUS092011 98-2000811
Copyright © 2009 SMA America, Inc. All rights reserved. No part of this document may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA America, Inc. SMA America makes no representations, express or implied, with respect to this documentation or any of the equipment and/or software it may describe, including (with no limitation) any implied warranties of utility, merchantability or fitness for any particular purpose. All such warranties are expressly disclaimed. Neither SMA America nor its distributors or dealers shall be liable for any indirect, incidental or consequential damages under any circumstances. (The exclusion of implied warranties may not apply in all cases under some statutes, and thus the above exclusion may not apply.) Specifications are subject to change without notice. Every attempt has been made to make this document complete, accurate and up-to-date. Readers are cautioned, however, that SMA America reserves the right to make changes without notice and shall not be responsible for any damages, including indirect, incidental or consequential damages, caused by reliance on the material presented, including, but not limited to, omissions, typographical errors, arithmetical errors or listing errors in the content material. SMA America, Incorporated 4031 Alvis Court Rocklin, CA 95677 Tel. +1 916 625 0870 Fax +1 916 625 0871 www.SMA-America.com
SMA Technologie AG
IMPORTANT SAFETY INSTRUCTIONS *SAVE THESE INSTRUCTIONS* This manual contains important instructions for the Sunny Tower ST6US that must be followed during the installation, operating and maintenance of the system. The Sunny Tower ST6US is designed and tested according to international safety requirements, but as with all electrical and electronic equipment, certain precautions must be observed when installing and/or operating the Sunny Tower ST6US. To reduce the risk of personal injury and to ensure the safe installation and operation of the Sunny Tower ST6US, you must carefully read and follow all instructions and warnings in this Installation Guide.
Safety and Hazard Symbols This symbol is used to call attention to important information that you must have when installing and/or operating the Sunny Tower ST6US. Failure to read and follow instructions marked with this symbol could result in serious injury or death and/or damage to the equipment.
Warnings WARNING: A warning describes a hazard to equipment or to personnel. It calls attention to a procedure or practice, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the SMA equipment and/or other equipment connected to the SMA equipment or personal injury. Warnings and cautions may also be accompanied by one or more of the safety and hazard symbols described above to indicate the type of hazard described therein.
Other Symbols In addition to the safety and hazard symbols described above, the following symbol is also used in this Installation Guide. This symbol indicates a fact that is important for optimum operation of the product. Read these sections carefully to ensure optimum operation of your product.
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General Warnings All electrical installation must be done by qualified personnel and in accordance with the National Electrical Code ANSI/NFPA 70, local building codes, and the requirements of the authority having jurisdiction. The Sunny Tower ST6US contains no user serviceable parts, for repair and maintenance always refer to qualified service personnel
Before installing or using the Sunny Tower ST6US, read all of the instructions, cautions and warnings on the Sunny Tower ST6US, the PV array, and this Installation Guide. Before connecting the Sunny Tower ST6US to the electrical utility grid, contact the local utility company. This connection must be made only by qualified personnel. PV arrays produce electrical energy when exposed to light and thus can create an electrical shock hazard. Wiring of the PV arrays should be performed by qualified personnel CAUTION Risk of electrical shock! Normally grounded conductors may be ungrounded and energized when a ground fault is indicated.
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Table of Contents
Table of Contents 1 1.1 1.2 1.3
Notes on this Manual. . . Validity . . . . . . . . . . . . . . Target Group . . . . . . . . . . Explanation of the Symbols
2 2.1 2.2 2.3 2.4 2.5
The Sunny Tower ST6US . Appropriate Usage. . . . . . . Device Overview . . . . . . . . Dimensions . . . . . . . . . . . . Name Plate . . . . . . . . . . . . WebBoxTowerUS. . . . . . . .
3 3.1 3.2
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . 15 Handling of the Sunny Tower ST6US . . . . . . . . . . . 15 Installer‘s Responsibilities . . . . . . . . . . . . . . . . . . . . 16
4 4.1 4.2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Required Tools and Materials . . . . . . . . . . . . . . . . 19 Installing the Sunny Tower ST6US . . . . . . . . . . . . . 19
4.2.1 4.2.2
Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 Minimum Workspace/Ventilation Requirements. . . . . . . . . . . . .20
4.3
Removing from the Pallet . . . . . . . . . . . . . . . . . . . . 20
4.4 4.5
Carrying the Sunny Tower ST6US . . . . . . . . . . . . . 20 Installing at the Location . . . . . . . . . . . . . . . . . . . . 21
5 5.1 5.2 5.3 5.4
Opening and Closing the Sunny Tower ST6US. . Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . Opening the Sunny Tower ST6US . . . . . . . . . . . . . Closing the Sunny Tower ST6US . . . . . . . . . . . . . . Opening and Closing the SB 7000US/SB 6000US .
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23 23 23 24 24 5
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6 6.1 6.2
Attaching the Conduits . . . . . . . . . . . . . . . . . . . . 25 Insert cables from the rear into the Sunny Tower . . . 25 Insert cables from below into the Sunny Tower . . . . 26
7 7.1 7.2 7.3 7.4 7.5
Electrical Connection . . . . . . . . . . . . . . . . . . . . . Connecting Ground . . . . . . . . . . . . . . . . . . . . . . . Connecting the AC Output . . . . . . . . . . . . . . . . . . Connecting the DC Input . . . . . . . . . . . . . . . . . . . . Installing the inverters on the Sunny Tower ST6US . . Wiring Connections to the SB6000US / SB7000US
7.5.1 7.5.2
AC Wiring of the SB 7000US/6000US . . . . . . . . . . . . . . . . . .36 DC Wiring of the SB 7000US/6000US . . . . . . . . . . . . . . . . . .38
8 8.1 8.2 8.3
Communication . . . . . . . . . . . . . . . . . . . . . External Communication device . . . . . . . . . . . Connecting another Sunny Tower ST6US . . . . Optional Sunny WebBoxTowerUS Installation .
9
Commissioning the Sunny Tower ST6US . . . . . . 47
10
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . 49
10.1 10.2
Sunny Tower ST6US with Sunny Boy SB7000US . . . 49 Sunny Tower ST6US with Sunny Boy SB6000US . . . 51
11
Contact. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
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29 30 31 32 34 34
41 42 43 44
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Notes on this Manual
1 Notes on this Manual 1.1 Validity This installation guide covers the correct installation and commissioning of a Sunny Tower ST6US.
1.2 Target Group Only trained electricians approved by the responsible energy supply company may install and commission a Sunny Tower ST6US. The instructions assume that you, the installer, are familiar with electrical installations and know the corresponding rules and regulations.
1.3 Explanation of the Symbols Used This symbol indicates a fact which, if not observed, could result in damage to components or represent a danger to persons. Please read these sections especially carefully. This symbol indicates a fact that is important for optimum operation of the product. Read these sections carefully to ensure optimum operation of your product.
This symbol indicates an example.
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Notes on this Manual
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SMA Technologie AG
The Sunny Tower ST6US
2 The Sunny Tower ST6US 2.1 Appropriate Usage The Sunny Tower ST6US is a mounting frame which enables you to easily install six inverters of type SB 7000US or SB 6000US. The AC and DC cabling is pre-wired, as is the communication via RS485, and the AC/DC Disconnect. An optional Sunny WebBox can be installed to allow remote monitoring of the PV plant via an internet connection. The Sunny Tower ST6US is delivered with a base plate for easy installation. Do not use the Sunny Tower ST6US for purposes other than those described here. the connection of voltage sources other than solar modules may damage the inverters. Alternative uses, modifications, as well as installing components not recommended or sold by SMA Technologie AG may void the warranty and any applicable interconnection agreements.
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The Sunny Tower ST6US
SMA Technologie AG
2.2 Device Overview The following figures provide you with an overview of the Sunny Tower ST6US and the arrangement of the SB6000US / SB7000US inverters on the Sunny Tower ST6US, as well as the rear view:
louvers
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The Sunny Tower ST6US
SMA America Inc. phone: 530.273.4896 www.sma-america.com
ST6US Mounting Frame for utiliy interactive inverter
Serial Number: 0000000001
SMA Technologie AG Hannoversche Straße 1 - 5 34266 Niestetal Germany Date of manufacture 05/2007
Max. continuous output Power* AC 42 kW
Range of input operating voltage DC 250 - 600 Vdc
voltage range (Vac)* AC Operating MIN NOMINAL MAX
Range of operating DC voltage* DC MPPT 250 - 480 Vdc
183 211 244
229 (Line to Line) 264 (Line to Line) 305 (Line to Neutral)
208 240 277
Operating frequency range (Hz) AC MIN NOMINAL MAX 59.3
AC Output power factor 1
Max. operating current DC 180 A (6 x 30 A) ENCLOSURE
Type 3R (IP54)
60.5
60.0
continous output current AC 3Max. x 117 A
Temperature ambient +113°F Grid type 3 phase
* For more details see the Operator´s Manual
(1) SB 2 SB 3
SB 1
2
SB 5 SB 4
SB 6 3
(1) AC/DC Disconnect
(2) Service Access Cover (3) Conduit Access/Mounting plate
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The Sunny Tower ST6US
2.3 Dimensions 35.07
~ 57.24
~ 25.75
71.3
~ 27.4
40.55
35.07
19.84
20.59
19.69
40.55 Dimensions are in inches
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The Sunny Tower ST6US
2.4 Name Plate You can identify the Sunny Tower ST6US with the aid of the name plate. The name plate is found on the back side (visible above the service access cover).
2.5 WebBoxTowerUS The WebBoxTowerUS is a communication option available from SMA America Inc. It enables remote communication with the Sunny Tower ST6US. The Sunny WebBox power supply is available in 2 voltage ranges, one version for voltages between 120 Vac and 240 Vac, the second version for 480 Vac. Verify that you have the correct version for the utility voltage prior to commissioning the Sunny Tower ST6US. Communication via RS485 is pre-wired as a standard feature.
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The Sunny Tower ST6US
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Installation Guide
SMA Technologie AG
IMPORTANT SAFETY INSTRUCTIONS
3 IMPORTANT SAFETY INSTRUCTIONS Save these instructions! This manual contains important instructions for model(s) ST6US that shall be followed during installation and maintenance of the power system.
3.1 Handling of the Sunny Tower ST6US The Sunny Tower ST6US has a weight of approximately 330 Ibs (without SB6000US / SB7000US). Four people must carry the unit, or a suitable transport trolley must be used. Always wear personal protective equipment (protective clothing, gloves, safety boots) to reduce risk of injury! Follow the instructions in the diagrams, signs and labels on each inverter and ensure that they are legible at all times.
Do not install the Sunny Tower ST6US •
on flammable construction materials
•
in areas where highly flammable materials are stored
•
in potentially explosive areas
Open and close the Sunny Tower ST6US only as described in section 5 “Opening and Closing the Sunny Tower ST6US” (Page 21) and follow the safety instructions listed there. Work on the Sunny Tower ST6US with the cover removed must be carried out by a qualified electrician. High voltages are present in the device. Before working on the Sunny Tower ST6US with the cover removed, AC and DC voltage MUST be disconnected from the Sunny Tower ST6US. When working on the Sunny Tower ST6US and handling the assemblies, remember to observe all ESD safety regulations. Electronic components are susceptible to electrostatic charge. Discharge any electrostatic charge by touching the grounded housing before handling any electronic component.
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IMPORTANT SAFETY INSTRUCTIONS
SMA Technologie AG
Guarantee that the louvers of the Sunny Tower ST6US are not covered. There is the danger of an accumulation of heat!
The temperature of individual parts of the case and of components inside the SB 7000US/SB 6000US can reach more than 60 °C (140 °F). Touching these parts could result in severe burns. The Sunny Tower must be securely fastened to the floor prior to installing and connecting the inverters.
Note that the roof of the Sunny Tower ST6US protrudes at a height of approximately 70.87“!
General safety rules for working on photovoltaic systems: 1.
Disconnect Before you start to work on the Sunny Tower ST6US, disconnect all wires which could carry voltage to the area you are working on!
2.
Protect against reenergizing. To prevent the device from being reenergized ensure that you block or lock it.
3.
Test each unit to ensure that all voltages have been removed. Use a voltmeter to ensure that the unit is completely deenergized.
3.2 Installer‘s Responsibilities Each person working on an electrical device is responsible for the safety of all persons involved and for the safety of the device.
Always be sure to observe all standards and regulations applicable to the installation and site.
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IMPORTANT SAFETY INSTRUCTIONS
This installation guide, the operating manual and the documentation of installed components must be kept in the immediate vicinity of the Sunny Tower ST6US, and must be available to installation, operation, maintenance and service staff at all times. The Sunny Tower ST6US should only be used when it is safe to do so. All safety features must be accessible at all times and their correct operation should be regularly tested. Read this installation guide carefully and be sure to observe and understand all safety regulations when installing and commissioning the system. You must also observe and understand all connection requirements of the local energy supplier and all applicable national codes and standards for installation of this equipment of the local energy supplier and all applicable national provisions of the country in which the system is installed. This information regarding operational safety refers to the regulations of the European Union valid at the time the Sunny Tower ST6US was produced. The installer is obliged to make sure that the mentioned safety measures comply with the regulations valid at the time and to observe new regulations when installing the Sunny Tower ST6US and the inverters. Outside the European Union, the laws on occupational safety applicable in the deployment location of the device and the respective national requirements must be adhered to. In addition to the work safety measures described in this installation guide, the general safety and accident prevention regulations which apply where the Sunny Tower ST6US is installed and the valid environmental protection regulations must be observed and followed. Follow all instructions in this installation guide completely and without restrictions!
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IMPORTANT SAFETY INSTRUCTIONS
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Installation Guide
SMA Technologie AG
Installation
4 Installation 4.1 Required Tools and Materials Quantity Tool / Material
Purpose
1
Hammer drill with a suitable drill bit Drilling the holes for the base plate anchors
4
Concrete anchors with a minimum di- Anchor the Sunny Tower base to the ameter of 3/8“ concrete pad
1
Hexagon (allen) key (5 mm)
Attaching the SB6000US / SB7000US wall mount brackets to the Sunny Tower ST6US
4.2 Installing the Sunny Tower ST6US The information contained in the installation guide must be observed when installing the Sunny Tower ST6US. The inverters are designed for installation outdoors, with a NEMA rating of 3R. The Sunny Tower ST6US must be installed in such a manner that the proper electrical connections, adequate ventilation, and adequate fire protection are possible.
4.2.1 Foundation The foundation must guarantee solid and safe positioning of the Sunny Tower ST6US. The foundation must provide the necessary load-carrying capacity to cope with the weight of the Sunny Tower ST6US (the fully equipped Sunny Tower ST6US with six inverters of type SB6000US / SB7000US weighs approximately 1100 Ibs). A foundation slab is recommended for ground-mounted installations. Pouring and structural inspection of the foundation slab should be performed onsite.
When pouring the foundation, keep in mind that the cables and conduits should enter the Sunny Tower ST6US from underneath. Therefore, suitable conduits or cable feedthroughs should be installed prior to pouring.
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SMA Technologie AG
Installation
4.2.2 Minimum Workspace/Ventilation Requirements Due to NEC 110.26 Work Space Requirements, a minimum of 36" of free space must be maintained around all four sides of the Sunny Tower ST6US.
4.3 Removing from the Pallet Ensure that you use the pre-installed carrying handles when removing the Sunny Tower ST6US from the pallet and moving it into place.
4.4 Carrying the Sunny Tower ST6US The Sunny Tower ST6US weighs 330 Ibs, four people must carry the Sunny Tower ST6US! It is imperative that you use the pre-installed carrying handles! Always wear personal protective equipment (protective clothing, gloves, safety boots) to avoid the danger of injuries.
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Installation
4.5 Installing at the Location ,
The Sunny Tower ST6US must stand absolutely securely (i.e. be installed) before you begin with the installation and cabling of the inverters.
The Sunny Tower ST6US must be installed on a level surface. Any existing unevenness, depressions, or slope must be corrected prior to installation.
Proceed as follows: 1.
Mark the positions of the base plate mounting holes on the mounting surface.
2.
At the marked positions, drill the holes for the anchor screws.
3.
Insert the concrete anchors in the drilled holes.
4.
Tightly screw the Sunny Tower ST6US in place.
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SMA Technologie AG
Installation
Once the Sunny Tower ST6US is secured, remove the carrying handles by unscrewing the stainless steel screws. Be sure to keep the screws, as they will be needed later for installation of the inverter mounting brackets.
For conduit hubs, use only UL listed rainthight, or wet location hubs for entry into the enclosure.
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Opening and Closing the Sunny Tower ST6US
5 Opening and Closing the Sunny Tower ST6US 5.1 Safety Instructions Components inside the Sunny Tower ST6US can reach more than 60 ºC (140 ºF) touching these components could lead to serious burns.
Work on the Sunny Tower ST6US must be completed only by a qualified electrician! High voltages are present in the device. Before working on the Sunny Tower ST6US disconnect AC and DC voltages sources from the Sunny Tower ST6US.
5.2 Opening the Sunny Tower ST6US 1.
Loosen the ten screws on the service access cover on the rear side of the Sunny Tower ST6US.
2.
Store the service access cover (2), mounting screws and washers in a safe place while mounting, installing or repairing the Sunny Tower ST6US.
3.
Remove the four screws that secure the conduit access/mounting plate to the rear of the Sunny Tower ST6US
4.
Store the conduit access/mounting plate (3), mounting screws and washers in a safe place while mounting, installing or repairing the Sunny Tower.
SMA America Inc. phone: 530.273.4896 www.sma-america.com
ST6US Mounting Frame for utiliy interactive inverter
Serial Number: 0000000001
SMA Technologie AG Hannoversche Straße 1 - 5 34266 Niestetal Germany Date of manufacture 05/2007
Max. continuous output Power* AC 42 kW
Range of input operating voltage DC 250 - 600 Vdc
voltage range (Vac)* AC Operating MIN NOMINAL MAX
Range of operating DC voltage* DC MPPT 250 - 480 Vdc
183 211 244
229 (Line to Line) 264 (Line to Line) 305 (Line to Neutral)
208 240 277
Operating frequency range (Hz) AC MIN NOMINAL MAX 59.3
AC Output power factor 1
Max. operating current DC 180 A (6 x 30 A) ENCLOSURE
Type 3R (IP54)
60.5
60.0
continous output current AC Max. 3 x 117 A
Temperature ambient +113°F Grid type 3 phase
* For more details see the Operator´s Manual
2
3
You will now have access to the AC and DC distribution terminals inside the Sunny Tower ST6US.
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Opening and Closing the Sunny Tower ST6US
SMA Technologie AG
5.3 Closing the Sunny Tower ST6US 1.
Align the holes in the service cover with the tapped holes in the rear of the Sunny Tower.
2.
Install the ten screws and washers, the teeth of the washers should face the cover to ensure proper grounding of the cover.
3.
Align the holes in the cable feed-through cover with the tapped holes in the rear of the Sunny Tower.
4.
Install the four screws and washers, the teeth of the washers should face the cover to ensure proper grounding of the cover.
5.4 Opening and Closing the SB 7000US/SB 6000US At this point, we ask that you refer to the SB 7000US/SB 6000US installation guide. Information on this subject can be read in the appropriate section.
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Attaching the Conduits
6 Attaching the Conduits In this section you will learn where to insert the cables in the Sunny Tower and where to punch the holes for the conduits. NOTICE! Moisture can seep through incorrect conduits and conduit hubs. Damage to the electronics of the Sunny Tower. •
For conduit hubs, use only UL Listed rainproof, or wet location hubs complying with UL 514B for entry into the enclosure.
•
Adjust the diameter of the conduit hubs to match the diameter of the conduits.
The PV panel cables, the AC cables and the communication cables can be routed into the Sunny Tower from the rear or from below. The two options are described below.
6.1 Insert cables from the rear into the Sunny Tower Insert the solar generator cables, the AC cables and the data cables into the Sunny Tower from the rear. An aluminum sheet is attached to the Sunny Central for this purpose. 1.
Remove the four screws that secure the conduit access/mounting plate to the rear of the Sunny Tower.
2.
Store the conduit access/mounting plate (3), mounting screws and washers in a safe place while mounting, installing or repairing the Sunny Tower.
3.
Mark all the holes for the conduits. You need one conduit for the AC cables (minimum), one conduit for the communication cables and one conduit for the DC cables (minimum).
4.
Punch holes for the conduits.
Figure to the right: Example for a plate with conduits. A: Conduit for AC cables. B: Conduit for communication cables. C: Conduit for DC cables.
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Attaching the Conduits
5.
Attach the plate to the Sunny Tower.
6.
Attach the screws and washers and tighten with a torque of 53 in-lbs.
7.
Insert the conduits into the openings.
8.
Attach the conduits with the appropriate hubs.
9.
Insert the cables into the Sunny Tower.
SMA Technologie AG
The cables are inserted.
6.2 Insert cables from below into the Sunny Tower Insert the solar generator cables, the AC cables and the data cables into the Sunny Tower from the bottom through the foundation. There are four openings in the base of the Sunny Tower through which the cables can be inserted into the Sunny Tower. Two aluminum sheets are attached above the openings. 1.
Remove the six screws that secure the aluminum sheets to the bottom of the Sunny Tower.
2.
Store the aluminum sheets, mounting screws and washers in a safe place.
3.
Place the Sunny Tower with the openings above the cable conduits onto the base.
4.
Fasten the Sunny Tower to the base as described in section 4.5 „Installing at the Location”.
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5.
Attaching the Conduits
Seal the Sunny Tower to the base. Without alumi- • num sheet
Seal the openings down to the base.
With aluminum • sheet
Punch holes for the conduits. Figure to the right: Example for plates with conduits. A: Conduit for AC cables. B: Conduit for communication cables. C: Conduit for DC cables.
6.
•
Insert the conduits into the openings.
•
Attach the plate to the bottom of the Sunny Tower.
•
Attach the screws and washers and tighten with a torque of 53 in-lbs.
•
Attach the conduits with the appropriate hubs.
Insert the cables into the Sunny Tower.
The cables are inserted.
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Attaching the Conduits
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Electrical Connection
7 Electrical Connection Save these instructions. This manual contains important instructions for model(s) ST6US, that should be followed during installation and maintenance of the power system. Refer to the table below for the appropriate torque values and wire sizes. Terminal
in. Ibs.
Nm.
Wire Size
Wire type
DC Terminal Blocks (PV-return or PV grounded conductors)
80
9
2 - 6 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
35
3.9
14 - 8 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
19
2.2
10 - 16 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
200
22.6
350 mcm -
600 V minimum rated 90 °C; copper or copper clad conductors only
DC Fuse Holder (PV-hot or PV ungrounded conductors)
3/0 AWG 100
11.4
2/0 - 1 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
80
9
2 - 6 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
35
3.9
8 - 14 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
Primary protective earthing terminal
89
10
2 - 2/0 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
Inverter protective earthing terminal
27
3
14 - 6 AWG
600 V minimum rated 90 °C; copper or copper clad conductors only
Cover Screws
53
6
—
—
AC Terminal Blocks
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Electrical Connection
SMA Technologie AG
7.1 Connecting Ground The diagram below shows the equipment grounding terminals of the Sunny Tower ST6US. They are located on the lower right side underneath the DC connections inside the Sunny Tower ST6US. The minimum size for the primary grounding electrode conductor is 6 AWG. The minimum size for the individual inverter grounding electrode conductors is 8 AWG.
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Electrical Connection
7.2 Connecting the AC Output When inserting the fuses provided with the ST6US, you must consider the local grid configuration and voltage! If the Sunny Tower is to be used in a 480/277 volt installation, the fuses for the L2 connections of each inverter must not be installed. These fuse holders are marked with yellow warning labels on the fuse holders inside the Sunny Tower. Maximum Inverter AC output fuse size is 50 A, Fuse must be fast acting Class J (for example: Ferraz A4J50, Bussman JKS-50, Littelfuse JLS-50) Ensure that the Sunny Tower is properly grounded and the bonding of your equipment is in accordance with NEC articles 250 and 690.
Attention: AC-output/neutral is not bonded to ground!
1.
Turn OFF the main breaker in the main utility box.
2.
Ensure that the correct breaker sizes specified in the table below are installed. System
Breaker
6 - SB7000U @ 480/277 V
70 A
6 - SB7000U @ 208/120 V
150 A
6 - SB7000U @ 240 V
125 A
6 - SB6000U @ 480/277 V
60
6 - SB6000U @ 208/120 V
125 A
6 - SB6000U @ 240 V
110 A
Ensure that conductors are sized in accordance with NEC article 310.
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Electrical Connection
SMA Technologie AG
The inscription goes from left to right. Ø
Connection terminal for the grid connection to L1
Ø
Connection terminal for the grid connection to L2
Ø
Connection terminal for the grid connection to L3
N
Connection terminal for the grid connection to N (neutral)
7.3 Connecting the DC Input When connecting the DC conductors from the PV array ensure proper high voltage safety precautions are followed. Before connecting the conductors ensure that an opaque covering is applied to the modules to protect against electric shock.
Make sure that your cable has sufficient length.
1.
Open the fuse switch of each individual safety device.
2.
PV array wiring can enter the tower enclosure from below or through the cable access cover. If necessary use an appropriate knock out punch to create knockouts for the array conduits.
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3.
Electrical Connection
PV array wiring should be fed to string fuse holders shown below. PV string conductors should be supported using the cable tie tabs near the inputs of the fuse holders and terminal blocks.
PV hot SB6
PV return SB6
PV return SB1 PV hot SB1
PV return SB2
PV hot SB5
PV hot SB2
PV return SB5
PV return SB3
PV hot SB4
PV hot SB3
PV return SB4
4.
PV hot (PV ungrounded) conductors should be connected to the fuse holders. PV return (PV grounded) conductors should be connected to the associated terminal blocks. The maximum allowable fuse size for the DC string fuses is 15 amps. Fuse must be fast acting (for example: Ferraz ATM15, Bussman KTK15, Littelfuse KLK15)
15 Amp fuses are provided with the Sunny Tower ST6US. The proper size PV string fuse is determined by 1.56 x Isc (of the PV module) and then rounding up to the next standard fuse size. Example: If the Isc of the PV module = 6.9 Adc then the fuse size is determined by 1.56 x 6.9 = 10.76. The next standard fuse size would be 12A, 600Vdc fuse. WARNING: The string fuse size must not be greater than the maximum fuse size rating of the PV module.
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Electrical Connection
SMA Technologie AG
7.4 Installing the inverters on the Sunny Tower ST6US The Sunny Tower ST6US must be securely fastened to the floor prior to installing and connecting the inverters.
Install the wall brackets for each SB6000US / SB7000US. Proceed as follows: 1.
Hold the wall bracket over the corresponding screw anchor holes.
2.
Fasten the wall bracket using the stainless steel screws (M8 x 16 with corresponding locking washers) provided with the Sunny Tower ST6US.
3.
Perform steps one and two for the remaining five wall brackets. Once the wall brackets are installed refer to the SB6000US / SB7000US manual For further installation instructions.
7.5 Wiring Connections to the SB6000US / SB7000US The AC and DC system cables are already pre-wired to the inverter mounting locations. In addition to this manual, refer to the SB6000US / SB7000US manual for instructions on wiring the AC and DC cables inside the inverters. The AC/DC switch serves to simultaneously disconnect the AC and DC connections. To learn how to connect a SB6000US / SB7000US on the AC side and how to configure the AC voltage of the inverter, please refer to the SB6000US / SB 7000US installation guide. Information on this subject can be read in the appropriate section. The DC input and AC output circuits are isolated from the enclosure and system grounding. If an alternative grounding scheme is required, it is the responsibility of the installer. The Photovoltaic system grounding shall be installed per the requirements of sections 690.41 through 690.47 of the National Electric Code, ANSI/NFPA 70, and is the responsibility of the installer. The National Electrical Code, ANSI / NFPA 70, wiring methods are to be used.
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Electrical Connection
AC cable
Communication cable DC cable
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Electrical Connection
Refer to the table below for the appropriate torque values and wire sizes. Terminal
in. Ibs.
Nm.
Wire Size
AC & DC Terminal Blocks
18
2
6 - 10 AWG
Unused Terminal Block for AC Configuration
11
1.3
—
Cover Screws
53
6
—
7.5.1 AC Wiring of the SB 7000US/6000US Use the following procedure to connect the AC wires to the Sunny Boy with the AC/DC Disconnect: You must connect the wires that carry the AC voltage from the Sunny Boy to the utility grid in the order described in this procedure. Deviating from this procedure could expose you to lethal voltages that can cause serious injury and/or death. Avoid using wire nuts to join any wires together or to make any connections anywhere in the PV system. Wire nuts are a frequent cause of unreliable, resistive connections, and ground faults. 1.
Connect the white wire of the AC/DC Disconnect to the terminal labeled N and the black wire to the terminal labeled L1 of the Sunny Boy.
2.
For 208/240 V connect the blue wire to the terminal labeled L2 in the Sunny Boy. For 277 V connect the blue wire to the terminal labeled PE in the Sunny Boy (not used).
3.
Connect the wires to the terminal blocks in the Sunny Boy and tighten to a torque of 18 in-lb (2 Nm).
4.
Verify that all connections are correctly wired and properly torqued.
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Electrical Connection
Following figure shows AC Connection Terminals for 208 V and 240 V.
V
V 0V
240
277 V
A B + -
208
2 3 5 7
White wire connected to N terminal Blue wire connected to L2 terminal
Black wire connected to L1 terminal
Following figure shows AC Connection Terminals for 277 V.
V
V 0V
240
277 V
A B + -
208
2 3 5 7
White wire connected to N terminal Black wire connected to L1 terminal Blue wire connected to PE terminal
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SMA Technologie AG
Electrical Connection
7.5.2 DC Wiring of the SB 7000US/6000US The Sunny Boy comes from the factory configured for negative ground systems. Certain types of PV modules may require that the positive terminal be grounded instead of the negative terminal. To configure the Sunny Boy for positive ground, move the fuse (1) and change the jumper position (2) as shown in the following illustrations. Following figure shows GFDI Fuse and Jumper Settings for Negative Ground.
2 1
Following figure shows GFDI Fuse and Jumper Settings for Positive Ground.
2
1
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Electrical Connection
Negative Grounding Following figure shows the DC Connection with negative grounding.
V
V 0V
240
277 V
A B + -
208
2 3 5 7
Black wire (PV HOT) connected to DC+ White wire (PV RETURN) connected to DCAvoid using wire nuts to join any wires together or to make any connections anywhere in the PV system. Wire nuts are a frequent cause of unreliable connections, resistive connections, and ground faults. Use the following procedure to connect the DC wires to the Sunny Boy: 1.
Connect the black wire (PV HOT) to the terminal labeled DC+ in the Sunny Boy.
2.
Connect the white wire (PV RETURN) to the terminal labeled DC- in the Sunny Boy.
3.
Torque all wires in the terminal blocks inside the Sunny Boy to 18 in-lb (2 Nm).
4.
Verify that all connections are correctly wired and properly torqued.
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SMA Technologie AG
Electrical Connection
Positive Grounding Following figure shows the DC Connection with positive grounding.
V
V
0V
240
277 V
A B + -
208
2 3 5 7
White wire (PV Return) connected to DC+ Black wire (PV HOT) connected to DC-
Avoid using wire nuts to join any wires together or to make any connections anywhere in the PV system. Wire nuts are a frequent cause of unreliable connections, resistive connections, and ground faults. 5.
Connect the white wire (PV RETURN) to the terminal labeled DC+ in the Sunny Boy.
6.
Connect the black wire (PV HOT) to the terminal labeled DC- in the Sunny Boy.
7.
Torque all wires in the terminal blocks inside the Sunny Boy to 18 in-lb (2 Nm).
8.
Verify that all connections are correctly wired and properly torqued.
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Communication
8 Communication The communication cables should be run in a separate conduit / raceway and be isolated from the power lines! Information in this section is further explained in the SB6000US / SB7000US manual as well as the Sunny WebBox manual.
The Sunny Tower ST6US comes pre-wired for RS-485 communication.
You must connect the communication cables in the individual SB6000US / SB7000US, and connect other bus participants with the communication distributor. For information how to connect the communication cables to the Sunny Boy, see the installation guide of the Sunny Boy. The communication distributor is situated inside the Sunny Tower ST6US. To ensure communication with the optional WebBoxTowerUS you must connect the communication wire to each installed SB6000US / SB7000US. Additional Connections are made to the communications termination bus inside the Sunny Tower ST6US. For further information please see the appropriate manual.
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Communication
8.1 External Communication device To connect an external communication device to the communications bus of the Sunny Tower ST6US simply connect the RS485 cable to the RJ45 socket as you can see below. External communication device
For additional bus participant or termination resistor
Pin configuration from RJ45-plug: PIN 1= Data
screen
PIN 3= Data +
8
1
42
-
PIN 2= GND
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Communication
8.2 Connecting another Sunny Tower ST6US
SMA America Inc. phone: 530.273.4896 www.sma-america.com
ST6US Mounting Frame for utiliy interactive inverter
Serial Number: 0000000001
Range of input operating voltage DC 250 - 600 Vdc MPPT Range of operating DC voltage* DC 250 - 480 Vdc
183 211 244
59.3
229 (Line to Line) 264 (Line to Line) 305 (Line to Neutral)
208 240 277
ENCLOSURE
SMA Technologie AG Hannoversche Straße 1 - 5 34266 Niestetal Germany
Range of input operating voltage DC 250 - 600 Vdc MPPT Range of operating DC voltage* DC 250 - 480 Vdc
183 211 244
59.3
229 (Line to Line) 264 (Line to Line) 305 (Line to Neutral)
208 240 277
Max. operating current DC 180 A (6 x 30 A) ENCLOSURE
Type 3R (IP54)
60.5
60.0
continous output current AC 3Max. x 117 A
AC Output power factor
Grid type 3 phase
Date of manufacture 05/2007
Max. continuous output Power* AC 42 kW Operating voltage range (Vac)* AC MIN NOMINAL MAX
Operating frequency range (Hz) AC MIN NOMINAL MAX
Type 3R (IP54)
Temperature ambient +113°F
1
Temperature ambient +113°F Grid type 3 phase
* For more details see the Operator´s Manual
* For more details see the Operator´s Manual
Sunny Tower ST6US 1
RJ45 socket for WebBoxTowerUS or external communication device
ST6US Mounting Frame for utiliy interactive inverter
Serial Number: 0000000001
Max. operating current DC 180 A (6 x 30 A)
60.5
60.0
AC Output power factor 1
SMA America Inc. phone: 530.273.4896 www.sma-america.com
SMA Technologie AG Hannoversche Straße 1 - 5 34266 Niestetal Germany Date of manufacture 05/2007
Max. continuous output Power* AC 42 kW Operating voltage range (Vac)* AC MIN NOMINAL MAX
Operating frequency range (Hz) AC MIN NOMINAL MAX continous output current AC 3Max. x 117 A
Sunny Tower ST6US 2
connection of next Sunny Tower ST6US
termination resistor location
If you would like to connect an additional Sunny Tower ST6US, please complete the following. 1.
Remove and save the bus termination resistor in the first Sunny Tower ST6US.
2.
In it´s place, connect a patch cable (RJ45 plug).
3.
Route this cable to the second Sunny Tower ST6US
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Communication
4.
SMA Technologie AG
In the second Sunny Tower ST6US place the bus termination resistor in the appropriate RJ45 socket, if not already present.
8.3 Optional Sunny WebBoxTowerUS Installation The optional Sunny WebBoxTowerUS is installed inside of the Sunny Tower ST6US. The communication cables from the WebBoxTowerUS to each SB6000US / SB7000US are already pre-installed. Proceed as follows: 1.
Remove the clear cover of the WebBoxTowerUS housing.
2.
Remove the square plug of the cable entry in the WebBoxTowerUS housing.
3.
Place the square plug over the Ethernet cable.
4.
Insert the square plug with the Ethernet cable into the cable entry of the WebBoxTowerUS housing.
5.
Attach the Ethernet cable to the WebBoxTowerUS.
6.
Install the clear cover on the WebBoxTowerUS housing.
Route the Ethernet cable parallel to the communication lines, further into the right front corner, then downward to the cable entry of the Sunny Towers. The connection of the communication cable to the SB6000US / SB7000US is described in detail in the SB6000 / SB7000US documentation. Please read the appropriate section of that documentation.
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Communication
WebBoxTowerUS 120–240 V version
RS485 cable to communication distribution
Installation Guide
AC-cable to Sunny Tower ST6US
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Communication
SMA Technologie AG
WebBoxTowerUS 480 V version
RS485 cable to communication distribution
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AC-cable to Sunny Tower ST6US
Installation Guide
SMA Technologie AG
Commissioning the Sunny Tower ST6US
9 Commissioning the Sunny Tower ST6US Proceed with commissioning the Sunny Tower ST6US only after: •
the housing covers on the SB6000US / SB7000US inverters are closed.
•
the DC cables (PV strings) are fully connected.
•
the AC (power) cable is connected.
•
all conduit fittings are secured.
Commissioning Procedure If you turn the AC/DC Disconnect switches from "1" (on) to "0" (off) you will disconnect the AC and DC voltage from the inverter. Grid feeding mode is interrupted. "1" (on): AC and DC power is connected to the inverter. "0" (off): AC and DC power is disconnected to the inverter. Make sure that all AC/DC switches are set to "0" (off).
1.
Switch on the breaker of your AC distribution panel, connecting the Sunny Tower to the grid. Verify the correct voltage range at the grid connection terminals, (see section 6.2) 208 V or 240 V or 277 V/480 V.
2.
Depending on AC voltage range insert both fuses ( 208 V or 240 V) or one fuse (277 V /480 V) into the fuse holders located above the grid connection terminals in the Sunny Tower ST6US. When inserting the fuses provided with the ST6US, you must consider the local grid configuration and voltage! If the Sunny Tower is to be used in a 480/277 volt installation, the fuses for the L2 connections of each inverter must not be installed. These fuse holders are marked with yellow warning labels on the fuse holders inside the Sunny Tower. Maximum Inverter AC output fuse size is 50 A, Fuse must be fast acting Class J (for example: Ferraz A4J50, Bussman JKS-50, Littelfuse JLS-50).
3.
Ensure all DC string fuse holders are closed. The maximum allowable fuse size for the DC string fuses is 15 amps. Fuse must be fast acting (for example: Ferraz ATM15, Bussman KTK15, Littelfuse KLK15).
4.
Install the rear covers on the Sunny Tower ST6US.
5.
One after another switch on the AC/DC switch of each SB 7000US/SB 6000US to "1" (on).
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Commissioning the Sunny Tower ST6US
6.
SMA Technologie AG
Check the green LED on each SB6000US / SB7000US, to ensure that each one is operating correctly. If the SB6000US / SB7000US displays other messages or blink codes, refer to the appropriate manual for trouble shooting information.
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Technical Data
10 Technical Data 10.1 Sunny Tower ST6US with Sunny Boy SB7000US The data listed here applies for a Sunny Tower ST6US equipped with six inverters of type SB 7000US. 4
Description
Short de- Setting scr.
Input data Max. DC input power
52 kW (STC)
DC voltage range
250 V - 600 V
Max. DC voltage
UDC, max 600 V
Max. input current
IPV, max
6 x 30 A
Max. no. of strings (parallel)
24 (4 per Inverter)
Thermally monitored varistors
yes
Ground fault monitoring
yes
Reverse polarity protection
yes
Output data Continuous AC output power
PAC, max
42 kW at 40 °C
Nominal AC output
PACnom
42 kW
Max. output current
IAC, max
208 V : 3 x 117 A (3-pole 150 A) 240 V : 3 x 101 A (3-pole 125 A) 480 V : 3 x 51 A (3-pole 70 A)
Harmonic distortion of nominal current Nominal AC voltage
98 %
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SMA Technologie AG
Technical Data
Description
Short de- Setting scr.
CEC rebate
ηeuro
96 %
Grid monitoring (UL 1741)
grid guard
Number of supply phases
3
Housing Protection degree
NEMA Type 3R
Cooling concept
OptiCool
Permissible ambient temperature
-13 °F to + 113 °F ( -25 °C to +45 °C)
Mechanical data Weight with inverter
approx. 1115 Ibs. (approx. 500 kg)
Dimensions (W x H x D)
40.55“ x 71.3“ x 35.07“
Features System monitoring
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prewired Sunny WebBox (optional)
Installation Guide
SMA Technologie AG
Technical Data
10.2 Sunny Tower ST6US with Sunny Boy SB6000US The data listed here applies for a Sunny Tower ST6US equipped with six inverters of type SB 6000US. Description
Short de- Setting scr.
Input data Max. DC input power
45 kW (STC)
DC voltage range
250 V - 600 V
Max. DC voltage
UDC, max 600 V
Max. input current
IPV, max
6 x 30 A
Max. no. of strings (parallel)
24 (4 per Inverter)
Thermally monitored varistors
yes
Ground fault monitoring
yes
Reverse polarity protection
yes
Output data Continuous AC output power
PAC, max
36 kW at 40 °C
Nominal AC output
PACnom
36 kW
Max. output current
IAC, max
208 V : 3 x 100 A (3-pole 125 A) 240 V : 3 x 87 A (3-pole 110 A) 480 V : 3 x 43 A (3-pole 60 A)
Harmonic distortion of nominal current Nominal AC voltage
98 %
CEC rebate
ηeuro
96 %
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SMA Technologie AG
Technical Data
Description
Short de- Setting scr.
Grid monitoring (UL 1741)
grid guard
Number of supply phases
3
Housing Protection degree
NEMA Type 3R
Cooling concept
OptiCool
Permissible ambient temperature
-13 °F to + 113 °F ( -25 °C to +45 °C)
Mechanical data Weight with inverter
approx. 1115 Ibs. (approx. 500 kg)
Dimensions (W x H x D)
43“ x 71“ x 39“
Features System monitoring
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prewired Sunny WebBox (optional)
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SMA Technologie AG
Contact
11 Contact If you have any questions or technical problems concerning the Sunny Tower ST6US, contact our technical support. Please have the following information available when you contact SMA: •
Serial number of the Sunny Tower ST6US
•
Type of inverters and modules connected, and number of modules
•
Communication method
•
Blink codes or display messages of the connected inverters
Address: SMA America, Incorporated 4031 Alvis Court Rocklin, CA 95677 Tel. +1 916 625 0870 Fax +1 916 625 0871 [email protected] www.SMA-America.com
Installation Guide
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Legal Restrictions
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Installation Guide
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