Medium Voltage
Catalogue
KOFD Indoor Type Current Transformers Cast Resin Insulated 12, 13.8, 17.5, 24 and 36 kV
96-1054
KOFD 1 GB 97-12
Medium Voltage ABB Transmit
1 KOFD 1 GB
KOFD Indoor Type Current Transformers Cast Resin Insulated 12, 13.8, 17.5, 24 and 36 kV
Index Description ............................................................................................ 3
Technical data and ordering information — Test voltages ................................................................................. –– Secondary wiring ........................................................................... –– Short circuit strength ..................................................................... –– Environment .................................................................................. –– Ordering data ................................................................................ –– Enquiry and order specifications .................................................. –– Order example .............................................................................. –– Use at high altitudes .....................................................................
4 4 4 5 5 5 5 6
Dimensions –– Medium and long size 12–17.5 kV .............................................. 7 –– Medium and long size 24 kV ....................................................... 13 –– Medium size 36 kV ....................................................................... 16
2 KOFD 1 GB
ABB Transmit
KOFD Indoor Type Current Transformers Cast Resin Insulated
96-1054
12, 13.8, 17.5, 24 and 36 kV
Description The current transformer series KOFD is built according the dimension standard DIN 42600, Narrow Type. The standard giving dimensions for only the herein called medium size ABB Transmit also has developed a longer version to provide more core space. The KOFDseries of transformers covers the current range 15–3000 Amps for 12–36 kV. The 13.8 kV and 17.5 kV versions have the same dimensions as the 12 kV version.
ABB Transmit
KOFD transformers are available as single ratio, primary reconnectible double ratio and secondary reconnectible double ratio (or multiratio) types.
3 KOFD 1 GB
Indoor Type Current Transformers Technical data and ordering information
Rated primary currents: Max. 600–1200 A primary reconnectable and 3200 A single ratio. Maximum rated continuous thermal current is 3600 A Secondary current:
5 A, 1 A. Others on request.
Accuracy classes:
0.2, 0.5, 1.0 for measuring 5P10, 5P15, 5P20, 10P10, 10P15, 10P20 for protection Others on request
Standards:
IEC 185, IEC 44-1, VDE 0414. Others on request.
Frequencies:
50 Hz, 60 Hz, others on request
Test voltages Type
Highest system voltage Power-frequency test, 1 min. Impulse withstand voltage (peak)
KOFD 12 kV
KOFD 13.8 kV
KOFD 17.5 kV
KOFD 24 kV
KOFD 36 kV
12 28 75
13.8 34 95
17.5 38 95
24 50 125
36 70 170
Short circuit strength Maximum short circuit values (type tested): Type 12–24 12–24 12–24 36 36
Ith
Idyn
1250 500–1000 3200 500–1000 1500
40 kA 3s, 70 kA 1s 70 kA/1 s 40 kA 3 s 31.5 kA 1 s 40 kA 3s
175 kA 175 kA 125 kA 80 kA 175 kA
92-1085
KOFD KOFD KOFD KOFD KOFD
Ipn/A
92-1089
Secondary wiring
4 KOFD 1 GB
The terminal box is metal with plastic cover and provided with two detachable threaded inserts, size Pg. 16. Degree of protection is IP 30. The terminals are provided with M5 screws for the termination of the secondary wiring and with throughgoing holes for direct earthing of the secondary circuit by M6 screws. 6 terminals can be supplied with this construction. Maximum 11 terminals with earthing bridges can be mounted when more than 6 terminals are required. Of these, 9 pcs may be used as core secondary terminals. The terminal cover is sealable.
ABB Transmit
Indoor Type Current Transformers Technical data and ordering information Cantilever strength: 5 kN Environment The ambient temperature range is from –5 oC to +40 oC (IEC recommendations). The transformers must be protected against unusually heavy deposits of dust or similar pollution, as well as against direct sunshine.
Ordering data For core tables and order information please see separate price list.
Enquiry and order specifications – – – – – – – – – – – –
Quantity Type System voltage Insulation level Frequency Short-time currents Ith (time) and Idyn Rated primary and secondary currents, extended current rating Rated burden and accuracy class for each core Electrical standard Ambient temperature if other than IEC (–5...+40 oC) Special requirements, if any (polarity, tropical version, high altitude etc.) Test report, if required, language specified
Order example 33 pcs KOFD 24C41 Un = 20 kV 24 / 50 / 125 kV 50 Hz 25 kA 1s / 63 kA 750 / 5 / 5 A, ext. 120 % core 1: cl. 0,5 Fs 10, 10 VA core 2: cl. 5P10, 5 VA IEC 185 Reversed polarity (P2 at the end with the sec. terminals) Test report needed, in english
ABB Transmit
5 KOFD 1 GB
Indoor Type Current Transformers Technical data and ordering information Use at high altitudes In mountaineous areas the height above sea level may be higher than the height specified in the IEC standard as design criteria (= 1000 m). The thin air at high altitudes affects the cooling of the transformers as well as the required creepage & free air distance to earth and between phases. The manufacturer should be consulted in such cases. The problem with creepage and free air distance can be solved by choosing transformer type designed for higher voltages. The requirement for impulse test voltge (BIL-level) should preferably NOT be higher than normal for the service voltage used as this may have a negative effect on the available output from the secondaries. The transformer specification can in such a case be for example: Type Service voltage Test voltages
KOFD 24 D2 17.5 kV 38 kV 1 min. / 95 kV impulse
The transformer type KOFD 17.5 D2 would have been suitable if used below 1000 m. Permissable torques for screw connections Strenght class for the screws is 8.8. The length of the screw within the nut part should be at least 1.4 x screw diameter. Screw
6 KOFD 1 GB
Max. torque Nm
Min. torque Nm
M5
3.5
2.8
M8
20
16
M12
70
56
ABB Transmit
Medium and long size Dimensions
12–17.5 kV
Medium size 2 6 0 2
2 5
Ipn < 1250 A Imax.cont. = 1500 A
2 0
2 2 0
1
4
1 7 0
P g 1 6 , P r 2 2 ,5
1 5 0
1 0 4
3 4 5 2 7 0
P 2
1 4 8
1 1
1 2 5
L
P 1
K
M 8
M 1 2
1 3 5
1 1 2 0
KOFD1
1 5
3 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 20 kg Type KOFD 12 A 21 KOFD 12 C 21 KOFD 12 E 21
KOFD 13.8 A 21 KOFD 13.8 C 21 KOFD 13.8 E 21
KOFD 17.5 A 21 KOFD 17.5 C 21 KOFD 17.5 E 21
Long size Ipn < 1250 A
2
2 5
3 8 0
Imax.cont. = 1500 A
2 0
2 2 0
1
P g 1 6 / P R 2 2 ,5
4
1 7 0
1 0 4
4 6 5 3 9 0 M 1 2
1 4 8
1 1
1 2 5
L
M 8
P 2
K
P 1
1 3 5
1 2 0
3 2
1
KOFD3
1 5
If more than 6 secondary terminals required (max. 11)
Weight ~ 31 kg Type KOFD KOFD KOFD KOFD
ABB Transmit
12 12 12 12
A C E G
41 41 41 41
KOFD KOFD KOFD KOFD
13.8 13.8 13.8 13.8
A C E G
41 41 41 41
KOFD KOFD KOFD KOFD
17.5 17.5 17.5 17.5
A C E G
41 41 41 41 7 KOFD 1 GB
Medium and long size Dimensions Medium size
12–17.5 kV
2 2 5
2 6 0
Ipn < 600–1200 A Imax.cont. = 1200 A
4
2 0
2 2 0
1
1 7 0
P k 1 6 , P g 1 6 P g 1 6 /P r 2 2 ,5
1 5 0
1 0 4
3 4 5 2 7 0
M 8
1 3 5
1 2 0
1 4 8
L b
1
3 2
KOFD2
1 5
L a
1 1
1 2 5
C 1 C 2 K b
P 2
P 1 K a
M 1 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 20 kg Type KOFD 12 B 21 KOFD 12 D 21 KOFD 12 F 21
KOFD 13.8 B 21 KOFD 13.8 D 21 KOFD 13.8 F 21
KOFD 17.5 B 21 KOFD 17.5 D 21 KOFD 17.5 F 21
Long size 3 8 0
2
2 5
Ipn < 600–1200 A Imax.cont. = 1200 A
4
2 0
2 2 0
1
1 7 0
2 7 0
P k 1 6 , P g 1 6 P g 1 6 /P r 2 2 ,5
4 6 5 3 9 0
M 8
1 2 0
1 4 8
3 2
1
KOFD4
1 5
L b
1 1
1 2 5
C 1 C 2 K b L a
P 2
P 1
M 1 2
K a
1 3 5
1 0 4
If more than 6 secondary terminals required (max. 11)
Weight ~ 31 kg Type KOFD KOFD KOFD KOFD
8 KOFD 1 GB
12 12 12 12
B D F H
41 41 41 41
KOFD KOFD KOFD KOFD
13.8 13.8 13.8 13.8
B D F H
41 41 41 41
KOFD KOFD KOFD KOFD
17.5 17.5 17.5 17.5
B D F H
41 41 41 41
ABB Transmit
Medium and long size Wide body Dimensions
12–17.5 kV
2 5 0 2
2 5
Medium size Wide body 1
2 2 0
Ipn < 1250 A
2 0
Imax.cont. = 1500 A 1 6 5
1 5 0
P g 1 6
1 0 4
3 4 0
2 7 0 1 3 5
1
M 8 M 1 2
P 1
P 2
8 0
1 8 4
K
L
1 2
4 0 1 6 0
L
P 2
K
P 1
4 0
O n re q u e s t
3 2 1 2 0
1 5
KOFD7
If more than 6 secondary terminals required (max. 11)
1 2 0
3 2
Weight ~ 29 kg Type KOFD 12 AA 21 KOFD 12 CA 21 KOFD 12 EA 21
KOFD 13.8 AA 21 KOFD 13.8 CA 21 KOFD 13.8 EA 21
KOFD 17.5 AA 21 KOFD 17.5 CA 21 KOFD 17.5 EA 21
3 4 5
Long size
2 5
1 2 5 2
Wide body Ipn < 1250 A
2 2 0
1
2 0
Imax.cont. = 1500 A 1 6 5 1 9 0
P g 1 6
2 7 2
1 0 4
4 6 2
3 9 0
If more than 6 secondary terminals required (max. 11)
4 0
O n re q u e s t P 1
P 2
1 8 4
1 6 0
KOFD15
L
K
8 0
1 2
4 0
L
1
P 2
K
M 8
M 1 2
P 1
1 3 5
1 2 0
1 5
3 2
3 2
1 2 0
Weight ~ 40 kg Type KOFD KOFD KOFD KOFD
ABB Transmit
12 12 12 12
AA CA EA GA
41 41 41 41
KOFD KOFD KOFD KOFD
13.8 13.8 13.8 13.8
AA CA EA GA
41 41 41 41
KOFD KOFD KOFD KOFD
17.5 17.5 17.5 17.5
AA CA EA GA
41 41 41 41 9 KOFD 1 GB
Medium and long size Wide body Dimensions Medium size
12–17.5 kV
2 5
2 5 0 2
Wide body Ipn < 600–1200A
2 2 0
1
2 0
Imax.cont. = 1200 A 1 5 0
1 6 5
P g 1 6
1 0 4
3 4 0
2 7 0
M 8
C 1 C 2
P 2
K b L a
L b
3 2
KOFD8
1 2
4 0 1 6 0
P 1 K a
1 2 0
1 5
1 8 4
M 1 2
1 3 5
1
If more than 6 secondary terminals required (max. 11)
Weight ~ 29 kg Type
KOFD 12 BA 21 KOFD 12 DA 21 KOFD 12 FA 21
Long size
KOFD 13.8 BA 21 KOFD 13.8 DA 21 KOFD 13.8 FA 21
KOFD 17.5 BA 21 KOFD 17.5 DA 21 KOFD 17.5 FA 21
3 4 5
2
Wide body
2 5
1 2 5
Ipn < 600–1200A 1
2 0
2 2 0
Imax.cont. = 1200 A
1 6 5 1 9 0
P g 1 6
2 7 2
1 0 4
4 6 2
3 9 0
M 8
P 2 L b
1 8 4
C 1 C 2 K b L a
4 0
P 1 K a
1 2
1 6 0
M 1 2
1 3 5
KOFD16
1 1 5
1 2 0
3 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 40 kg Type KOFD KOFD KOFD KOFD
10 KOFD 1 GB
12 12 12 12
BA DA FA HA
41 41 41 41
KOFD KOFD KOFD KOFD
13.8 13.8 13.8 13.8
BA DA FA HA
41 41 41 41
KOFD KOFD KOFD KOFD
17.5 17.5 17.5 17.5
BA DA FA HA
41 41 41 41
ABB Transmit
Medium and long size Dimensions Medium size
12–17.5 kV
2 6 0 2 2 5
Ipn < 3200 A Imax.cont. = 3200 A
2 0
2 2 0
1
3 4 5 2 7 0
1 0 4
M 8 M 1 2
1
K
L
1 1
4 0 8 0 1 2 5
P 2
P 1
1 3 5
1 4 8
4
P g 1 6 / P r. 2 2 ,5
1 5 0
1 7 0
KOFD6
1 5
1 2 0
3 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 26 kg
Type KOFD 12 P 21 KOFD 12 R 21 KOFD 12 S 21
Long size
KOFD 13.8 P 21 KOFD 13.8 R 21 KOFD 13.8 S 21
KOFD 17.5 P 21 KOFD 17.5 R 21 KOFD 17.5 S 21
3 8 0 2 2 5
Ipn < 3200 A Imax.cont. = 3200 A
2 0
2 2 0
1
P g 1 6 / P r. 2 2 ,5
2 7 0
4 6 5 3 9 0 M 1 2
M 8
KOFD5
K
L
1 1
4 0
P 2
P 1
1 3 5
1 0 4
8 0 1 2 5 1 4 8
4
1 7 0
1 5
1 2 0
3 2
1
If more than 6 secondary terminals required (max. 11)
Weight ~ 37 kg Type KOFD KOFD KOFD KOFD ABB Transmit
12 12 12 12
P R S T
41 41 41 41
KOFD KOFD KOFD KOFD
13.8 13.8 13.8 13.8
P R S T
41 41 41 41
KOFD KOFD KOFD KOFD
17.5 17.5 17.5 17.5
P R S T
41 41 41 41 11 KOFD 1 GB
Medium and long size Wide body Dimensions
12–17.5 kV
2 5 0 2
Medium size Wide body 1
2 2 0
Ipn < 3200 A
2 0
Imax.cont. = 3600 A 1 5 0
1 6 5
P g 1 6
1 0 4
3 4 0
2 7 0
M 8
1 8 4
8 0
1 6 0
1 2
L
K
4 0
P 2
P 1
M 1 2 x 2 5 tie f
1 3 5
1 KOFD64
1 5
1 2 0
If more than 6 secondary terminals required (max. 11)
3 2
Weight ~ 30 kg Type KOFD 12 K 21 KOFD 12 L 21 KOFD 12 M 21
Long size Wide body
KOFD 13.8 K 21 KOFD 13.8 L 21 KOFD 13.8 M 21
KOFD 17.5 K 21 KOFD 17.5 L 21 KOFD 17.5 M 21
3 4 5 2
1 2 5
Ipn < 3200A
2 2 0
1
2 0
Imax.cont. = 3600A
2 7 2
1 6 5 1 9 0
P g 1 6
1 0 4
4 6 2
3 9 0
M 8
1 8 4
8 0
1 2
L
K
4 0
P 1
P 2
1 6 0
M 1 2 x 2 5
1 3 5
KOFD65
1 1 5
1 2 0
3 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 41 kg Type KOFD 12 K 41 KOFD 12 L 41 KOFD 12 M 41 KOFD 12 N 41
12 KOFD 1 GB
KOFD 13.8 K 41 KOFD 13.8 L 41 KOFD 13.8 M 41 KOFD 13.8 N 41
KOFD 17.5 K 41 KOFD 17.5 L 41 KOFD 17.5 M 41 KOFD 17.5 N 41 ABB Transmit
Medium and long size Dimensions Medium size
24 kV
2
2 5
2 5 0
Ipn < 1250 A 2 8 0
Imax.cont. = 1500 A
2 0
1
P 2
1 7 8
1
1 4
1 5 0
K
M 8
M 1 2
P 1
1 4 0
3 4 5 2 8 0
1 0 4
L
4
P g 1 6 / P r. 2 2 ,5
1 5 5
1 6 5
3 2
1 2 0
Weight ~ 29 kg
KOFD9
1 9
If more than 6 secondary terminals required (max. 11)
Type KOFD 24 A 21 KOFD 24 C 21 KOFD 24 E 21 3 4 5 2 2 5
Long size Ipn < 1250 A
2 8 0
Imax.cont. = 1500 A
2 0
1
2 5 0
1 7 8
1 4
KOFD11
1 0 4
M 8
1 5 0
K
4 4 0 3 7 5 M 1 2
P 1
1 4 0
P k 1 6 , P g 1 6 P g 1 6 /P r 2 2 ,5
L P 2
4
1 6 5
1 9
1 2 0
3 2
1
If more than 6 secondary terminals required (max. 11)
Weight ~ 42 kg Type KOFD KOFD KOFD KOFD ABB Transmit
24 24 24 24
A E C G
41 41 41 41 13 KOFD 1 GB
Medium and long size Dimensions
24 kV
2 5 0
2 2 5
Medium size Ipn < 600–1200A
2 8 0
Imax.cont. = 1200 A
2 0
1
1 5 5
P k 1 6 , P g 1 6 P g 1 6 /P r 2 2 ,5
3 4 5 2 8 0 1 4 0
M 8
C 1 C 2
P 2
K b L a
L b
1 5 0
P 1
M 1 2
K a
1 4 KOFD10
1 9
1 0 4
1 7 8
4
1 6 5
1
3 2
1 2 0
If more than 6 secondary terminals required (max. 11)
Weight ~ 29 kg Type KOFD 24 B 21 KOFD 24 D 21 KOFD 24 F 21
Long size 3 4 5 2
2 5
Ipn < 600–1200 A
2 8 0
Imax.cont. = 1500 A
2 0
1
4
1 6 5
2 5 0
P k 1 6 , P g 1 6
1 0 4
P g 1 6 /P r 2 2 ,5
P 2 L b
1 7 8
C 1 C 2 K b L a
1 4
1 5 0
P 1
M 8
K a
1 4 0
4 4 0 3 7 5 M 1 2
KOFD12
1 1 9
1 2 0
3 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 42 kg Type KOFD KOFD KOFD KOFD
14 KOFD 1 GB
24 24 24 24
B D F H
41 41 41 41
ABB Transmit
Medium and long size Dimensions Medium size
24 kV
2 5
2 5 0 2
Ipn < 3200 A
2 8 0
Imax.cont. = 3600 A
2 0
1
4
1 6 5
P g 1 6 / P r. 2 2 ,5
1 5 5
1 0 4
3 4 5
2 8 0 1 4 0
M 8
4 0 8 0 1 5 0 1 7 8
1
1 4
KOFD13
K
L
P 1
P 2
M 1 2
Weight ~ 33 kg
3 2
1 2 0
1 9
If more than 6 secondary terminals required (max. 11)
Type KOFD 24 K 21 KOFD 24 L 21 KOFD 24 M 21
Long size 3 4 5 2 2 5
Ipn > 3200 A
2 8 0
Imax.cont. = 3600 A
2 0
1
4
P g 1 6 / P r 2 2 .5
2 5 0
1 6 5
1 0 4
4 4 0
3 7 5
L
4 0
P 2
P 1 K
1 4
KOFD14
1 9
1 2 0
3 2
1 5 0 1 7 8
M 8
M 1 2
8 0
1 4 0
1
If more than 6 secondary terminals required (max. 11)
Weight ~ 46 kg Type KOFD 24 K 41 KOFD 24 L 41 KOFD 24 M 41 KOFD 24 N 41
ABB Transmit
15 KOFD 1 GB
Medium size Dimensions Narrow body
36 kV
3 4 3 2
Ipn < 1250 A
4 0 5
3 9 0
2 5
Imax.cont. = 1500 A
2 0
1
2 1 1
1 7 1 ,5
P k 1 6
M 8
1 0 5
4 1 0 3 0 0 M 1 2
1
If more than 6 secondary terminals required (max. 15)
Weight ~ 52 kg 4 0 2 2 5 2 4 9
L
P 2
P 1
K
1 5 0
KOFD18
1 4
Type
3 2
2 2 0
1 9
Wide body
KOFD KOFD KOFD KOFD
36 36 36 36
A C E G
41 41 41 41
2
3 4 3
Ipn < 1250 A
4 0 5
3 9 0
2 5
Imax.cont. = 1500 A
2 0
1
2 1 1
1 7 1 ,5 M 8
P k 1 6
1 0 5
4 1 0 3 0 0 1 5 0
M 1 2
If more than 6 secondary terminals required (max. 15)
Weight ~ 72 kg
1 4
4 0 2 2 5 2 4 9
L
P 2
P 1
K
1
KOFD20
Type
16 KOFD 1 GB
1 9
2 2 0
3 2
KOFD KOFD KOFD KOFD
36 36 36 36
AA CA EA GA
41 41 41 41
ABB Transmit
Medium size Dimensions
36 kV
3 4 3
2
Narrow body Ipn < 600–1200 A
3 9 0
4 0 8
2 5
Imax.cont. = 1200 A
2 0
1
2 1 1
1 7 1 ,5
P k 1 6
M 8
1 0 5
4 1 0 3 0 0 1 5 0
M 1 2
L b
L a
K b
4 0 2 2 5 2 4 9
Weight ~ 52 kg
1 4
K a
If more than 6 secondary terminals required (max. 15)
P a
C 2
P 1
C 1
1
KOFD19
Type 2 2 0
1 9
Wide body
KOFD KOFD KOFD KOFD
3 2
36 36 36 36
B D F H
41 41 41 41
3 4 3 2
Ipn < 600–1200 A
4 0 8
3 9 0
2 5
Imax.cont. = 1200 A
2 0
1
2 1 1
1 7 1 ,5 M 8
P k 1 6
1 0 5
4 1 0 3 0 0 1 5 0
M 1 2
2 4 9
2 2 5
4 0 L b
L a
K b
K a
1 4 KOFD21
ABB Transmit
If more than 6 secondary terminals required (max. 15)
P 2
C 2
C 1
P 1
1
Weight ~ 72 kg Type
1 9
2 2 0
3 2
KOFD KOFD KOFD KOFD
36 36 36 36
BA DA FA HA
41 41 41 41 17 KOFD 1 GB
Medium size 36 kV Dimensions 3 4 3
Ipn < 3000 A
3 9 0
Imax.cont. = 3000 A
4 0 5
2 5
2
Medium size Wide body
2 0
1
2 1 1
1 7 1 ,5 4 1 0
M 8
P k 1 6
1 0 5
3 0 0
1 5 0
M 1 2
If more than 6 secondary terminals required (max. 15)
Weight ~ 72 kg 1 4
KOFD22
K
L
4 0 8 0 2 2 5 2 4 9
P 2
P 1
1
7 0
1 9 2 2 0
18 KOFD 1 GB
3 2
Type KOFD 36 K 41 KOFD 36 L 41 KOFD 36 M 41 KOFD 36 N 41
ABB Transmit
ABB Transmit
19 KOFD 1 GB
KOFD 1 GB 97-12
20 KOFD 1 GB
Waasa Graphics Oy 3000, 97-12
ABB Transmit Oy MV Systems Division Instrument Transformers P.O. Box 613, FIN-65101 Vaasa, Finland Phone +358 10 22 4000 Telefax +358 10 22 42616
ABB Transmit
KOFD Indoor Type Current Transformers Cast Resin Insulated 12, 13.8, 17.5, 24 and 36 kV
96-1054
KOFD 1 GB 97-12
Medium Voltage ABB Transmit
1 KOFD 1 GB
KOFD Indoor Type Current Transformers Cast Resin Insulated 12, 13.8, 17.5, 24 and 36 kV
Index Description ............................................................................................ 3
Technical data and ordering information — Test voltages ................................................................................. –– Secondary wiring ........................................................................... –– Short circuit strength ..................................................................... –– Environment .................................................................................. –– Ordering data ................................................................................ –– Enquiry and order specifications .................................................. –– Order example .............................................................................. –– Use at high altitudes .....................................................................
4 4 4 5 5 5 5 6
Dimensions –– Medium and long size 12–17.5 kV .............................................. 7 –– Medium and long size 24 kV ....................................................... 13 –– Medium size 36 kV ....................................................................... 16
2 KOFD 1 GB
ABB Transmit
KOFD Indoor Type Current Transformers Cast Resin Insulated
96-1054
12, 13.8, 17.5, 24 and 36 kV
Description The current transformer series KOFD is built according the dimension standard DIN 42600, Narrow Type. The standard giving dimensions for only the herein called medium size ABB Transmit also has developed a longer version to provide more core space. The KOFDseries of transformers covers the current range 15–3000 Amps for 12–36 kV. The 13.8 kV and 17.5 kV versions have the same dimensions as the 12 kV version.
ABB Transmit
KOFD transformers are available as single ratio, primary reconnectible double ratio and secondary reconnectible double ratio (or multiratio) types.
3 KOFD 1 GB
Indoor Type Current Transformers Technical data and ordering information
Rated primary currents: Max. 600–1200 A primary reconnectable and 3200 A single ratio. Maximum rated continuous thermal current is 3600 A Secondary current:
5 A, 1 A. Others on request.
Accuracy classes:
0.2, 0.5, 1.0 for measuring 5P10, 5P15, 5P20, 10P10, 10P15, 10P20 for protection Others on request
Standards:
IEC 185, IEC 44-1, VDE 0414. Others on request.
Frequencies:
50 Hz, 60 Hz, others on request
Test voltages Type
Highest system voltage Power-frequency test, 1 min. Impulse withstand voltage (peak)
KOFD 12 kV
KOFD 13.8 kV
KOFD 17.5 kV
KOFD 24 kV
KOFD 36 kV
12 28 75
13.8 34 95
17.5 38 95
24 50 125
36 70 170
Short circuit strength Maximum short circuit values (type tested): Type 12–24 12–24 12–24 36 36
Ith
Idyn
1250 500–1000 3200 500–1000 1500
40 kA 3s, 70 kA 1s 70 kA/1 s 40 kA 3 s 31.5 kA 1 s 40 kA 3s
175 kA 175 kA 125 kA 80 kA 175 kA
92-1085
KOFD KOFD KOFD KOFD KOFD
Ipn/A
92-1089
Secondary wiring
4 KOFD 1 GB
The terminal box is metal with plastic cover and provided with two detachable threaded inserts, size Pg. 16. Degree of protection is IP 30. The terminals are provided with M5 screws for the termination of the secondary wiring and with throughgoing holes for direct earthing of the secondary circuit by M6 screws. 6 terminals can be supplied with this construction. Maximum 11 terminals with earthing bridges can be mounted when more than 6 terminals are required. Of these, 9 pcs may be used as core secondary terminals. The terminal cover is sealable.
ABB Transmit
Indoor Type Current Transformers Technical data and ordering information Cantilever strength: 5 kN Environment The ambient temperature range is from –5 oC to +40 oC (IEC recommendations). The transformers must be protected against unusually heavy deposits of dust or similar pollution, as well as against direct sunshine.
Ordering data For core tables and order information please see separate price list.
Enquiry and order specifications – – – – – – – – – – – –
Quantity Type System voltage Insulation level Frequency Short-time currents Ith (time) and Idyn Rated primary and secondary currents, extended current rating Rated burden and accuracy class for each core Electrical standard Ambient temperature if other than IEC (–5...+40 oC) Special requirements, if any (polarity, tropical version, high altitude etc.) Test report, if required, language specified
Order example 33 pcs KOFD 24C41 Un = 20 kV 24 / 50 / 125 kV 50 Hz 25 kA 1s / 63 kA 750 / 5 / 5 A, ext. 120 % core 1: cl. 0,5 Fs 10, 10 VA core 2: cl. 5P10, 5 VA IEC 185 Reversed polarity (P2 at the end with the sec. terminals) Test report needed, in english
ABB Transmit
5 KOFD 1 GB
Indoor Type Current Transformers Technical data and ordering information Use at high altitudes In mountaineous areas the height above sea level may be higher than the height specified in the IEC standard as design criteria (= 1000 m). The thin air at high altitudes affects the cooling of the transformers as well as the required creepage & free air distance to earth and between phases. The manufacturer should be consulted in such cases. The problem with creepage and free air distance can be solved by choosing transformer type designed for higher voltages. The requirement for impulse test voltge (BIL-level) should preferably NOT be higher than normal for the service voltage used as this may have a negative effect on the available output from the secondaries. The transformer specification can in such a case be for example: Type Service voltage Test voltages
KOFD 24 D2 17.5 kV 38 kV 1 min. / 95 kV impulse
The transformer type KOFD 17.5 D2 would have been suitable if used below 1000 m. Permissable torques for screw connections Strenght class for the screws is 8.8. The length of the screw within the nut part should be at least 1.4 x screw diameter. Screw
6 KOFD 1 GB
Max. torque Nm
Min. torque Nm
M5
3.5
2.8
M8
20
16
M12
70
56
ABB Transmit
Medium and long size Dimensions
12–17.5 kV
Medium size 2 6 0 2
2 5
Ipn < 1250 A Imax.cont. = 1500 A
2 0
2 2 0
1
4
1 7 0
P g 1 6 , P r 2 2 ,5
1 5 0
1 0 4
3 4 5 2 7 0
P 2
1 4 8
1 1
1 2 5
L
P 1
K
M 8
M 1 2
1 3 5
1 1 2 0
KOFD1
1 5
3 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 20 kg Type KOFD 12 A 21 KOFD 12 C 21 KOFD 12 E 21
KOFD 13.8 A 21 KOFD 13.8 C 21 KOFD 13.8 E 21
KOFD 17.5 A 21 KOFD 17.5 C 21 KOFD 17.5 E 21
Long size Ipn < 1250 A
2
2 5
3 8 0
Imax.cont. = 1500 A
2 0
2 2 0
1
P g 1 6 / P R 2 2 ,5
4
1 7 0
1 0 4
4 6 5 3 9 0 M 1 2
1 4 8
1 1
1 2 5
L
M 8
P 2
K
P 1
1 3 5
1 2 0
3 2
1
KOFD3
1 5
If more than 6 secondary terminals required (max. 11)
Weight ~ 31 kg Type KOFD KOFD KOFD KOFD
ABB Transmit
12 12 12 12
A C E G
41 41 41 41
KOFD KOFD KOFD KOFD
13.8 13.8 13.8 13.8
A C E G
41 41 41 41
KOFD KOFD KOFD KOFD
17.5 17.5 17.5 17.5
A C E G
41 41 41 41 7 KOFD 1 GB
Medium and long size Dimensions Medium size
12–17.5 kV
2 2 5
2 6 0
Ipn < 600–1200 A Imax.cont. = 1200 A
4
2 0
2 2 0
1
1 7 0
P k 1 6 , P g 1 6 P g 1 6 /P r 2 2 ,5
1 5 0
1 0 4
3 4 5 2 7 0
M 8
1 3 5
1 2 0
1 4 8
L b
1
3 2
KOFD2
1 5
L a
1 1
1 2 5
C 1 C 2 K b
P 2
P 1 K a
M 1 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 20 kg Type KOFD 12 B 21 KOFD 12 D 21 KOFD 12 F 21
KOFD 13.8 B 21 KOFD 13.8 D 21 KOFD 13.8 F 21
KOFD 17.5 B 21 KOFD 17.5 D 21 KOFD 17.5 F 21
Long size 3 8 0
2
2 5
Ipn < 600–1200 A Imax.cont. = 1200 A
4
2 0
2 2 0
1
1 7 0
2 7 0
P k 1 6 , P g 1 6 P g 1 6 /P r 2 2 ,5
4 6 5 3 9 0
M 8
1 2 0
1 4 8
3 2
1
KOFD4
1 5
L b
1 1
1 2 5
C 1 C 2 K b L a
P 2
P 1
M 1 2
K a
1 3 5
1 0 4
If more than 6 secondary terminals required (max. 11)
Weight ~ 31 kg Type KOFD KOFD KOFD KOFD
8 KOFD 1 GB
12 12 12 12
B D F H
41 41 41 41
KOFD KOFD KOFD KOFD
13.8 13.8 13.8 13.8
B D F H
41 41 41 41
KOFD KOFD KOFD KOFD
17.5 17.5 17.5 17.5
B D F H
41 41 41 41
ABB Transmit
Medium and long size Wide body Dimensions
12–17.5 kV
2 5 0 2
2 5
Medium size Wide body 1
2 2 0
Ipn < 1250 A
2 0
Imax.cont. = 1500 A 1 6 5
1 5 0
P g 1 6
1 0 4
3 4 0
2 7 0 1 3 5
1
M 8 M 1 2
P 1
P 2
8 0
1 8 4
K
L
1 2
4 0 1 6 0
L
P 2
K
P 1
4 0
O n re q u e s t
3 2 1 2 0
1 5
KOFD7
If more than 6 secondary terminals required (max. 11)
1 2 0
3 2
Weight ~ 29 kg Type KOFD 12 AA 21 KOFD 12 CA 21 KOFD 12 EA 21
KOFD 13.8 AA 21 KOFD 13.8 CA 21 KOFD 13.8 EA 21
KOFD 17.5 AA 21 KOFD 17.5 CA 21 KOFD 17.5 EA 21
3 4 5
Long size
2 5
1 2 5 2
Wide body Ipn < 1250 A
2 2 0
1
2 0
Imax.cont. = 1500 A 1 6 5 1 9 0
P g 1 6
2 7 2
1 0 4
4 6 2
3 9 0
If more than 6 secondary terminals required (max. 11)
4 0
O n re q u e s t P 1
P 2
1 8 4
1 6 0
KOFD15
L
K
8 0
1 2
4 0
L
1
P 2
K
M 8
M 1 2
P 1
1 3 5
1 2 0
1 5
3 2
3 2
1 2 0
Weight ~ 40 kg Type KOFD KOFD KOFD KOFD
ABB Transmit
12 12 12 12
AA CA EA GA
41 41 41 41
KOFD KOFD KOFD KOFD
13.8 13.8 13.8 13.8
AA CA EA GA
41 41 41 41
KOFD KOFD KOFD KOFD
17.5 17.5 17.5 17.5
AA CA EA GA
41 41 41 41 9 KOFD 1 GB
Medium and long size Wide body Dimensions Medium size
12–17.5 kV
2 5
2 5 0 2
Wide body Ipn < 600–1200A
2 2 0
1
2 0
Imax.cont. = 1200 A 1 5 0
1 6 5
P g 1 6
1 0 4
3 4 0
2 7 0
M 8
C 1 C 2
P 2
K b L a
L b
3 2
KOFD8
1 2
4 0 1 6 0
P 1 K a
1 2 0
1 5
1 8 4
M 1 2
1 3 5
1
If more than 6 secondary terminals required (max. 11)
Weight ~ 29 kg Type
KOFD 12 BA 21 KOFD 12 DA 21 KOFD 12 FA 21
Long size
KOFD 13.8 BA 21 KOFD 13.8 DA 21 KOFD 13.8 FA 21
KOFD 17.5 BA 21 KOFD 17.5 DA 21 KOFD 17.5 FA 21
3 4 5
2
Wide body
2 5
1 2 5
Ipn < 600–1200A 1
2 0
2 2 0
Imax.cont. = 1200 A
1 6 5 1 9 0
P g 1 6
2 7 2
1 0 4
4 6 2
3 9 0
M 8
P 2 L b
1 8 4
C 1 C 2 K b L a
4 0
P 1 K a
1 2
1 6 0
M 1 2
1 3 5
KOFD16
1 1 5
1 2 0
3 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 40 kg Type KOFD KOFD KOFD KOFD
10 KOFD 1 GB
12 12 12 12
BA DA FA HA
41 41 41 41
KOFD KOFD KOFD KOFD
13.8 13.8 13.8 13.8
BA DA FA HA
41 41 41 41
KOFD KOFD KOFD KOFD
17.5 17.5 17.5 17.5
BA DA FA HA
41 41 41 41
ABB Transmit
Medium and long size Dimensions Medium size
12–17.5 kV
2 6 0 2 2 5
Ipn < 3200 A Imax.cont. = 3200 A
2 0
2 2 0
1
3 4 5 2 7 0
1 0 4
M 8 M 1 2
1
K
L
1 1
4 0 8 0 1 2 5
P 2
P 1
1 3 5
1 4 8
4
P g 1 6 / P r. 2 2 ,5
1 5 0
1 7 0
KOFD6
1 5
1 2 0
3 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 26 kg
Type KOFD 12 P 21 KOFD 12 R 21 KOFD 12 S 21
Long size
KOFD 13.8 P 21 KOFD 13.8 R 21 KOFD 13.8 S 21
KOFD 17.5 P 21 KOFD 17.5 R 21 KOFD 17.5 S 21
3 8 0 2 2 5
Ipn < 3200 A Imax.cont. = 3200 A
2 0
2 2 0
1
P g 1 6 / P r. 2 2 ,5
2 7 0
4 6 5 3 9 0 M 1 2
M 8
KOFD5
K
L
1 1
4 0
P 2
P 1
1 3 5
1 0 4
8 0 1 2 5 1 4 8
4
1 7 0
1 5
1 2 0
3 2
1
If more than 6 secondary terminals required (max. 11)
Weight ~ 37 kg Type KOFD KOFD KOFD KOFD ABB Transmit
12 12 12 12
P R S T
41 41 41 41
KOFD KOFD KOFD KOFD
13.8 13.8 13.8 13.8
P R S T
41 41 41 41
KOFD KOFD KOFD KOFD
17.5 17.5 17.5 17.5
P R S T
41 41 41 41 11 KOFD 1 GB
Medium and long size Wide body Dimensions
12–17.5 kV
2 5 0 2
Medium size Wide body 1
2 2 0
Ipn < 3200 A
2 0
Imax.cont. = 3600 A 1 5 0
1 6 5
P g 1 6
1 0 4
3 4 0
2 7 0
M 8
1 8 4
8 0
1 6 0
1 2
L
K
4 0
P 2
P 1
M 1 2 x 2 5 tie f
1 3 5
1 KOFD64
1 5
1 2 0
If more than 6 secondary terminals required (max. 11)
3 2
Weight ~ 30 kg Type KOFD 12 K 21 KOFD 12 L 21 KOFD 12 M 21
Long size Wide body
KOFD 13.8 K 21 KOFD 13.8 L 21 KOFD 13.8 M 21
KOFD 17.5 K 21 KOFD 17.5 L 21 KOFD 17.5 M 21
3 4 5 2
1 2 5
Ipn < 3200A
2 2 0
1
2 0
Imax.cont. = 3600A
2 7 2
1 6 5 1 9 0
P g 1 6
1 0 4
4 6 2
3 9 0
M 8
1 8 4
8 0
1 2
L
K
4 0
P 1
P 2
1 6 0
M 1 2 x 2 5
1 3 5
KOFD65
1 1 5
1 2 0
3 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 41 kg Type KOFD 12 K 41 KOFD 12 L 41 KOFD 12 M 41 KOFD 12 N 41
12 KOFD 1 GB
KOFD 13.8 K 41 KOFD 13.8 L 41 KOFD 13.8 M 41 KOFD 13.8 N 41
KOFD 17.5 K 41 KOFD 17.5 L 41 KOFD 17.5 M 41 KOFD 17.5 N 41 ABB Transmit
Medium and long size Dimensions Medium size
24 kV
2
2 5
2 5 0
Ipn < 1250 A 2 8 0
Imax.cont. = 1500 A
2 0
1
P 2
1 7 8
1
1 4
1 5 0
K
M 8
M 1 2
P 1
1 4 0
3 4 5 2 8 0
1 0 4
L
4
P g 1 6 / P r. 2 2 ,5
1 5 5
1 6 5
3 2
1 2 0
Weight ~ 29 kg
KOFD9
1 9
If more than 6 secondary terminals required (max. 11)
Type KOFD 24 A 21 KOFD 24 C 21 KOFD 24 E 21 3 4 5 2 2 5
Long size Ipn < 1250 A
2 8 0
Imax.cont. = 1500 A
2 0
1
2 5 0
1 7 8
1 4
KOFD11
1 0 4
M 8
1 5 0
K
4 4 0 3 7 5 M 1 2
P 1
1 4 0
P k 1 6 , P g 1 6 P g 1 6 /P r 2 2 ,5
L P 2
4
1 6 5
1 9
1 2 0
3 2
1
If more than 6 secondary terminals required (max. 11)
Weight ~ 42 kg Type KOFD KOFD KOFD KOFD ABB Transmit
24 24 24 24
A E C G
41 41 41 41 13 KOFD 1 GB
Medium and long size Dimensions
24 kV
2 5 0
2 2 5
Medium size Ipn < 600–1200A
2 8 0
Imax.cont. = 1200 A
2 0
1
1 5 5
P k 1 6 , P g 1 6 P g 1 6 /P r 2 2 ,5
3 4 5 2 8 0 1 4 0
M 8
C 1 C 2
P 2
K b L a
L b
1 5 0
P 1
M 1 2
K a
1 4 KOFD10
1 9
1 0 4
1 7 8
4
1 6 5
1
3 2
1 2 0
If more than 6 secondary terminals required (max. 11)
Weight ~ 29 kg Type KOFD 24 B 21 KOFD 24 D 21 KOFD 24 F 21
Long size 3 4 5 2
2 5
Ipn < 600–1200 A
2 8 0
Imax.cont. = 1500 A
2 0
1
4
1 6 5
2 5 0
P k 1 6 , P g 1 6
1 0 4
P g 1 6 /P r 2 2 ,5
P 2 L b
1 7 8
C 1 C 2 K b L a
1 4
1 5 0
P 1
M 8
K a
1 4 0
4 4 0 3 7 5 M 1 2
KOFD12
1 1 9
1 2 0
3 2
If more than 6 secondary terminals required (max. 11)
Weight ~ 42 kg Type KOFD KOFD KOFD KOFD
14 KOFD 1 GB
24 24 24 24
B D F H
41 41 41 41
ABB Transmit
Medium and long size Dimensions Medium size
24 kV
2 5
2 5 0 2
Ipn < 3200 A
2 8 0
Imax.cont. = 3600 A
2 0
1
4
1 6 5
P g 1 6 / P r. 2 2 ,5
1 5 5
1 0 4
3 4 5
2 8 0 1 4 0
M 8
4 0 8 0 1 5 0 1 7 8
1
1 4
KOFD13
K
L
P 1
P 2
M 1 2
Weight ~ 33 kg
3 2
1 2 0
1 9
If more than 6 secondary terminals required (max. 11)
Type KOFD 24 K 21 KOFD 24 L 21 KOFD 24 M 21
Long size 3 4 5 2 2 5
Ipn > 3200 A
2 8 0
Imax.cont. = 3600 A
2 0
1
4
P g 1 6 / P r 2 2 .5
2 5 0
1 6 5
1 0 4
4 4 0
3 7 5
L
4 0
P 2
P 1 K
1 4
KOFD14
1 9
1 2 0
3 2
1 5 0 1 7 8
M 8
M 1 2
8 0
1 4 0
1
If more than 6 secondary terminals required (max. 11)
Weight ~ 46 kg Type KOFD 24 K 41 KOFD 24 L 41 KOFD 24 M 41 KOFD 24 N 41
ABB Transmit
15 KOFD 1 GB
Medium size Dimensions Narrow body
36 kV
3 4 3 2
Ipn < 1250 A
4 0 5
3 9 0
2 5
Imax.cont. = 1500 A
2 0
1
2 1 1
1 7 1 ,5
P k 1 6
M 8
1 0 5
4 1 0 3 0 0 M 1 2
1
If more than 6 secondary terminals required (max. 15)
Weight ~ 52 kg 4 0 2 2 5 2 4 9
L
P 2
P 1
K
1 5 0
KOFD18
1 4
Type
3 2
2 2 0
1 9
Wide body
KOFD KOFD KOFD KOFD
36 36 36 36
A C E G
41 41 41 41
2
3 4 3
Ipn < 1250 A
4 0 5
3 9 0
2 5
Imax.cont. = 1500 A
2 0
1
2 1 1
1 7 1 ,5 M 8
P k 1 6
1 0 5
4 1 0 3 0 0 1 5 0
M 1 2
If more than 6 secondary terminals required (max. 15)
Weight ~ 72 kg
1 4
4 0 2 2 5 2 4 9
L
P 2
P 1
K
1
KOFD20
Type
16 KOFD 1 GB
1 9
2 2 0
3 2
KOFD KOFD KOFD KOFD
36 36 36 36
AA CA EA GA
41 41 41 41
ABB Transmit
Medium size Dimensions
36 kV
3 4 3
2
Narrow body Ipn < 600–1200 A
3 9 0
4 0 8
2 5
Imax.cont. = 1200 A
2 0
1
2 1 1
1 7 1 ,5
P k 1 6
M 8
1 0 5
4 1 0 3 0 0 1 5 0
M 1 2
L b
L a
K b
4 0 2 2 5 2 4 9
Weight ~ 52 kg
1 4
K a
If more than 6 secondary terminals required (max. 15)
P a
C 2
P 1
C 1
1
KOFD19
Type 2 2 0
1 9
Wide body
KOFD KOFD KOFD KOFD
3 2
36 36 36 36
B D F H
41 41 41 41
3 4 3 2
Ipn < 600–1200 A
4 0 8
3 9 0
2 5
Imax.cont. = 1200 A
2 0
1
2 1 1
1 7 1 ,5 M 8
P k 1 6
1 0 5
4 1 0 3 0 0 1 5 0
M 1 2
2 4 9
2 2 5
4 0 L b
L a
K b
K a
1 4 KOFD21
ABB Transmit
If more than 6 secondary terminals required (max. 15)
P 2
C 2
C 1
P 1
1
Weight ~ 72 kg Type
1 9
2 2 0
3 2
KOFD KOFD KOFD KOFD
36 36 36 36
BA DA FA HA
41 41 41 41 17 KOFD 1 GB
Medium size 36 kV Dimensions 3 4 3
Ipn < 3000 A
3 9 0
Imax.cont. = 3000 A
4 0 5
2 5
2
Medium size Wide body
2 0
1
2 1 1
1 7 1 ,5 4 1 0
M 8
P k 1 6
1 0 5
3 0 0
1 5 0
M 1 2
If more than 6 secondary terminals required (max. 15)
Weight ~ 72 kg 1 4
KOFD22
K
L
4 0 8 0 2 2 5 2 4 9
P 2
P 1
1
7 0
1 9 2 2 0
18 KOFD 1 GB
3 2
Type KOFD 36 K 41 KOFD 36 L 41 KOFD 36 M 41 KOFD 36 N 41
ABB Transmit
ABB Transmit
19 KOFD 1 GB
KOFD 1 GB 97-12
20 KOFD 1 GB
Waasa Graphics Oy 3000, 97-12
ABB Transmit Oy MV Systems Division Instrument Transformers P.O. Box 613, FIN-65101 Vaasa, Finland Phone +358 10 22 4000 Telefax +358 10 22 42616
ABB Transmit
