1vap428581 Obct
1vap428581 Obct
1vap428581 Obct
Product features
Single and multi-ratio
Externally mounted
50-60 Hz
600 V class
Application
Outdoor bushing current transformers are used for relaying on
existing power transformers or circuit breakers. Installation time
is minimum since it is not necessary to remove bushings or
open the tank for mounting.
Due to varying bushing dimensions, it is recommended that the
power transformer or circuit breaker manufacturer determine
if the bushing strike distance will be affected by the size of the
bushing current transformer being installed.
Construction features
The core and coil assemblies are housed in an aluminum case and
filled with polyurethane. The aluminum case has a shielding effect,
protecting the winding in case of bushing flashover. A secondary
junction box with three conduit fittings is standard on every unit.
Curves
Saturation, overcurrent, ratio correction factor, and phase-angle
curves are available upon request.
Test reports
IEEE test reports are stored electronically and can be e-mailed
in various formats at the time of shipment.
Standards
This unit meets all applicable IEEE and NEMA standards.
Installation notes
Remove bushing flange nuts (4 total as shown) and assemble
mounting brackets.
Remove bushing gaps to allow clearance for lowering current
transformer over bushing.
Maintain 3/8" clearance between current transformer housing
and bushing tap socket.
Caution: When mounting current transformer, care must be
taken to see that the inside wall of the current transformer
clears and does not touch any metal parts of bushing or
mounting, so as not to complete a ground circuit around
current transformer housing.
Maximum K (bushing shed diameter) is F - 1/8"
Maximum L (for voltage tap socket clearance) is F/2 - 3/8"
Minimum M (bushing flange height) is J + 1/4"
BOLT CIRCLE
DIAMETER
Selection guide
Inside diameter (in.)
Style number
C400
0.3B-0.5
1.33
7881A86G01
18
C400
0.6B-0.5
1.33
7881A86G02
22
C400
0.6B-0.5
1.33
7881A86G03
32
C400
0.6B-0.2
1.33
7881A86G04
C800
0.3B-2.0
1.33
7881A86G05
18
C800
0.3B-0.5
1.33
7881A86G06
22
C800
0.3B-0.5
1.33
7881A86G07
32
C800
0.3B-0.2
1.33
7881A86G08
C800
0.3B-2.0
1.33
7881A86G09
18
C800
0.3B-2.0
1.33
7881A86G10
22
C800
0.3B-2.0
1.33
7881A86G11
32
C800
0.3B-0.5
1.33
7881A86G12
C800
0.3B-2.0
1.33
7881A86G51
18
C800
0.3B-2.0
1.33
7881A86G52
22
C800
0.3B-2.0
1.33
7881A86G53
32
C800
0.3B-2.0
1.33
7881A86G54
Additional styles available upon request. Contact your ABB sales representative or call +1-252-827-3212 for more information.
Number of bolts
Style number
12
7.25
0.6875
589A864G01
12
8.25
0.6875
589A864G01
12
9.25
0.875
589A864G02
18
9.25
0.875
589A864G04
22
13.25
1.25
589A864G03
22
13.25
1.25
589A864G04
22
15.75
1.25
589A864G05
32
21.00
12
1.25
589A864G06
Unit dimensions
Note: metric dimensions are displayed in [mm].
SECONDARY JUNCTION
BOX WITH CONDUIT CONN.
ON THREE SIDES
NAMEPLATE
PRIMARY
POLARITY
MARKER
2.19
[56]
THIS SURFACE
TO BE MOUNTED
DOWN
B.C.
HOLES FOR
.63 MTG
BOLTS
4-TOTAL
GO.D.
LIFTING LUG
4-TOTAL
F I.D.
45
.38
[10]
45
Dimensions (in)
Style number
7881A86G01
26.53
12.06
14.47
12.53
22.88
12.0
24.13
6.0
6.38
Weight (lb)
240
7881A86G02
33.03
15.19
17.84
15.91
29.13
18.0
30.38
6.0
6.38
330
7881A86G03
37.28
17.25
20.03
18.09
33.25
22.0
34.50
6.0
6.38
400
7881A86G04
47.56
22.31
25.25
23.31
43.38
32.0
44.63
6.0
6.38
550
7881A86G05
26.53
12.06
14.47
12.53
22.88
12.0
24.13
6.0
6.38
240
7881A86G06
33.03
15.19
17.84
15.91
29.13
18.0
30.38
6.0
6.38
330
7881A86G07
37.28
17.25
20.03
18.09
33.25
22.0
34.50
6.0
6.38
400
7881A86G08
47.56
22.25
25.25
23.31
43.38
32.0
44.63
6.0
6.38
550
7881A86G09
25.88
11.75
14.13
12.19
22.25
12.0
23.50
4.56
4.94
155
7881A86G10
32.34
14.84
17.50
15.56
28.44
18.0
29.69
4.56
4.94
210
7881A86G11
36.44
16.84
19.59
17.66
32.44
22.0
33.69
4.56
4.94
245
7881A86G12
46.75
21.91
24.84
22.91
42.56
32.0
43.81
4.56
4.94
340
7881A86G51
24.94
11.31
13.63
11.69
21.38
12.0
22.63
4.38
4.75
125
7881A86G52
31.03
14.22
16.81
14.88
27.19
18.0
28.44
4.19
4.56
160
7881A86G53
35.34
16.31
19.03
17.09
31.38
22.0
32.63
4.19
4.56
190
7881A86G54
45.66
21.38
24.28
22.34
41.50
32.0
42.75
4.19
4.56
200
Weight (kg)
Dimensions (mm)
Style number
7881A86G01
674
306
368
318
581
305
613
152
162
109
7881A86G02
839
386
453
404
740
457
772
152
162
150
7881A86G03
947
438
509
459
845
559
876
152
162
181
7881A86G04
1208
567
641
592
1102
813
1134
152
162
249
7881A86G05
674
306
368
318
581
305
613
152
162
109
7881A86G06
839
386
453
404
740
457
772
152
162
150
7881A86G07
947
438
509
459
845
559
876
152
162
181
249
7881A86G08
1208
565
641
592
1102
813
1134
152
162
7881A86G09
657
298
359
310
565
305
597
116
125
70
7881A86G10
821
377
445
395
722
457
754
116
125
95
7881A86G11
926
428
498
449
824
559
856
116
125
111
7881A86G12
1187
556
631
582
1081
813
1113
116
125
154
7881A86G51
633
287
346
297
543
305
575
111
121
57
7881A86G52
788
361
427
378
691
457
722
106
116
73
7881A86G53
898
414
483
434
797
559
829
106
116
86
7881A86G54
1160
543
617
567
1054
813
1086
106
116
91
ABB Inc.
Medium Voltage Distribution Components
3022 NC 43 North
Pinetops, NC 27864
USA
Phone: +1 252 827 3212
Fax: +1 252 827 4286
www.abb.com/mediumvoltage
Note:
We reserve the right to make technical changes or modify the contents of this
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particulars shall prevail. ABB does not accept any responsibility whatsoever for
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Copyright 2011 ABB.
All rights reserved.