Page 133 - intelligent encyclopedia ( equipment issue 1 )

intelligent
TRANSFORMERS

Protection
of public bars:

Frame Leakage
Protection that’s at 33 KV
bars only.

Buchholz relay:
Bu
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closed and the alarm occurs.
In case of disconnected the electrical transformer after
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electric transformer.

The temperature ,W KDV OLPLW IRU WKH WHPSHUDWXUH RI RLO LQ WKH WUDQVIRUPHU ZKHQ EH
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EH PDNH DODUP ZKHQ EH PDNH WULS

Pressure: +HUH LQ WKH FDVH RI GHOD\LQJ WKH RSHUDWLRQ RI WKH %XFKKRO]H 5HOD\ DQG WKH 'LIIHUHQ-
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Transformer testing

The transformers should meet the conditions of the HOHFWURFXWLRQ VWDQGDUG VSHFLÀFDWLRQV ZKLFK DUH UH-
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No load tests

The load is raised on the sides of the low voltage in the transformer with keeping the sides of the medium
voltage open, the following parameters are measured:

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• 0HDVXULQJ WKH ORVV RI SRZHU DW QR ORDG QR ORDG ORVVHV
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DFFHSWHG WDEOHV RI JXDUDQWHH
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Short circuit test

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