Page 131 - intelligent encyclopedia ( equipment issue 1 )

intelligent
TRANSFORMERS

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WURPDJQHWLF LQGXFWLRQ

Types of transformers

Step up transformer ZKHQ WKH QXPEHU RI WXUQV RI WKH SULPDU\ FRLO ´
1Sµ PRUH WKDQ QXPEHU RI WXUQV RI WKH VHFRQG-
DU\ FRLO µ1Vµ LW·V FDOOHG VWHS XS WUDQVIRUPHU WKDW
means the output of the transformer more than its
input

Step down transformer ZKHQ WKH QXPEHU RI WXUQV RI WKH VHFRQGDU\ FRLO
´1Vµ PRUH WKDQ QXPEHU RI WXUQV RI WKH SULPDU\
FRLO µ1Sµ LW·V FDOOHG VWHS GRZQ WUDQVIRUPHU WKDW
means the output of the transformer less than its
input

7KH HIÀFLHQF\ RI WUDQVIRUPHU

,WV UDWLR RI WKH PD[LPXP FDSDFLW\ FDQ EH SXOOHG IURP WKH VHFRQGDU\ FRLO WR WKH SULPD-
ry coil capacity.
The protection of the transformer

The main component for protection circuit

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& 7 9 7
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'LUHFW YROWDJH VRXUFH FRQWDLQ IURP EDWWHU\ DQG 'F FKDUJHU

The main component for protection circuit

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$X[LOLDU\ 5HOD\
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FH FRQWDLQ IURP EDWWHU\ DQG 'F FKDUJHU

How to work the stages of protection

Measure the electrical quantities. Measure the electrical quantities after con-
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6HQG GLVFRQQHFW VLJQDO WR WKH FLUFXLW EUHDNHU ed before
DQG VHQG DODUP VLJQDO
Isolate the fault.

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