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Medium Voltage Products

TPO 7x.xxOutdoor current transformers

The TPO 7x.xx transformers are cast in epoxy resin, capable of withstanding outdoor environmental conditions, and designed for insulation voltages to 40.5 kV.

DescriptionThe TPO 7x.xx transformers are designed as single-or-multiple turn transformers, with one transformer ratio, and, if necessary, with the possibility to be reconnectable on the primary or secondary side.

The number of secondary windings ranges from 1 to 4 (usu-ally 2) depending on parameters (such as the accuracy class, short-circuit current, overcurrent factor, burden…).

The secondary windings are used for measurement or pro-tection purposes, or for special use (testing windings, „PX” class). One terminal of each secondary winding used, and one terminal of the unused, short-circuited, winding must be earthed during the transformer operation.

The transformer body is fixed by using four screws. For ease of handling and assembly the transformer is supplied with suspension lugs.

The secondary winding is led out into a cast secondary termi-nal board covered with a sealable cover.

The transformers are designed and manufactured to conform with the requirements and recommendations of the following standards: IEC, VDE, ANSI, BS, GOST, ČSN and PN-EN.

ParametersRated primary currents 1) [A] 10 ÷ 3000

Primary current reconnectable [A] 20-40 ÷ 600-1200

Rated secondary currents 2) [A] 5; 1

Rated frequency [Hz] 50; 60

Highest voltage for equipment [kV] up to 40.5

Rated power-frequency withstand

voltage (r.m.s.), 1 min.

[kV] up to 90

Rated lightning impulse withstand

voltage (peak)

[kV] up to 200

Rated short – time thermal current,

1 sec.

[kA] 100

Max. rated burden/classes 3) [VA/cl] 3 ÷ 60/ 0,2; 0,2S; 0,5; 0,5S;

1; 3; 5P; 10P

Temperature class E

Ambient temperature [°C] -60...+55

Reconnectable primary or secondary

1) Different primary currents can be supplied to special order.2) It is possible to combine different values in one transformer.3) Other classes are available on request.

2 TPO 7x.xx

Dimensions

weight: approx. 90 kgcreepage distance: 1600 mm


TPO 70.11

TPO 70.12

TPO 7x.xx 3

TPO 71.11-76.11

TPO 7 x . x x

0...up to 600 A multi-turn1...up to 400 A one-turn2...up to 600 A one-turn3...up to 1250 A one-turn4...up to 1500 A one-turn5...up to 2000 A one-turn 6...up to 3000 A one-turn

1...non-reconnectable on primary side2...reconnectable on primary side

... design

Basic marking

Marking of the current transformer outlets

Insulation levels for TPO 7x.xx transformers

36/70/170 kV38.5/80/180 kV40.5/95/200 kV

a) Single-core design

d) Single-core design, reconnectable on the secondary side

b) Double-core design

e) Double-core design, reconnectable on the secondary side

c) Three-core design

f) Double-core design, reconnectable on the primary side

P1 (K)

S1(k)

S2(l)

P2 (L) P1 (K)

1S1(1k)

1S2(1l)

2S1(2k)

2S2(2l)

P2 (L) P1 (K)

1S1(1k)

1S2(1l)

2S1(2k)

2S2(2l)

3S1(3k)

3S2(3l)

P2 (L)

P1 (K)

S1(k)

S3(l2)

S2(l1)

P2 (L) P1 (K)

1S1(1k)

1S3(1l2)

1S2(1l1)

2S1(2k)

2S3(2l2)

2S2(2l1)

P2 (L)

P1(Ka)

C1(Kb)

C2(La)

P2(Lb)

1S1(1k)

1S2(1l)

2S1(2k)

2S2(2l)


3405

PL4

04-W

2-en

. Ed

ition

04.

2011For more information please contact:

ABB Sp. z o.o. Branch in Przasnysz59 Leszno Str. 06-300 Przasnysz Phone: +48 29 75 33 000 Fax: +48 29 75 33 327

www.abb.pl

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 Sp. z o.o. 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, disclosure to third parties or utilization of its contents – in whole or in parts – is forbidden without prior written consent of ABB Sp. z o.o.

© Copyright 2011 ABBAll rights reserved

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