1vap428581_obct

Outdoor bushing current transformerSingle and multi-ratio, externally mounted

Instrument transformers

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

lled with polyurethane. The aluminum case has a shielding effect,

protecting the winding in case of bushing ashover. A secondary

junction box with three conduit ttings 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 appl icable IEEE and NEMA standards.

2 Outdoor bushing current transformer | ABB product bulletin

Installation notes

Additional sty les available upon request. Contact your ABB sales representati ve or call +1-252-827-3212 for more in formation.

Selection guide

Inside diameter (in.) IEEE relaying accuracy IEEE metering accuracy Continuous rating factor Style number

Nominal ratio 600:5 MR

12 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


12 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


12 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


12 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

− 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"

Mounting bracket selection guide

IEEE bushing flange characteristics

Inside diameter (in.) Bolt circle diameter (in.) Number of bolts Bolt size (in.) Style number

12 7.25 4 0.6875 589A864G01

12 8.25 4 0.6875 589A864G01

12 9.25 6 0.875 589A864G02

18 9.25 6 0.875 589A864G04

22 13.25 6 1.25 589A864G03

22 13.25 6 1.25 589A864G04

22 15.75 8 1.25 589A864G05

32 21.00 12 1.25 589A864G06

K

L

M

BOLT CIRCLE

DIAMETER

ABB product bulletin | Outdoor bushing current transformer 3

B.C.

I.D.

D

B

C

A

45°

O.D.

45°

G

F

2.19[56]

H

E

J

.38[10]

PRIMARYPOLARITY

MARKER

NAMEPLATE SECONDARY JUNCTIONBOX WITH CONDUIT CONN.ON THREE SIDES

HOLES FOR.63 MTGBOLTS4-TOTAL

LIFTING LUG4-TOTAL

THIS SURFACETO BE MOUNTEDDOWN

Unit dimensions

Dimensions (in)

Style number A B C D E F G H J Weight (lb)

7881A86G01 26.53 12.06 14.47 12.53 22.88 12.0 24.13 6.0 6.38 240

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

Dimensions (mm)

Style number A B C D E F G H J Weight (kg)

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

7881A86G08 1208 565 641 592 1102 813 1134 152 162 249

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

Note: metric dimensions are displayed in [mm].

1 V A P 4 2 8 5 8 1 - D B

M a y 2 0 1 1 R e v .

A

For more information please contact:

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

document without prior notice. With regard to purchase orders, the agreed

particulars shall prevail. ABB does not accept any responsibility whatsoever for

potential errors or possible lack of information in this document. We reserve

all rights in this document and in the subject matter and illustrations contained

therein. Any reproduction–in whole or in parts–is forbidden without ABB’s prior

written consent.

Copyright 2011 ABB.

All r ights reser ved.

1vap428581_obct

Documents

Transcript of 1vap428581_obct