What are methods to avoid the inrush current at the time of starting of power

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What are methods to avoid the inrush current at the time of
starting of power transformer ?

Question Posted / maheshreddy

8 Answers
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What are methods to avoid the inrush current at the time of starting of power transformer ?..

Answer / suresh kumar

We cannot avoid inrush current when any transformer is
switched on after a long period of shutdown. Only thing we
can do is minimising it by charging the transformer by the
lowest voltage (using tapp changers)and we can avoid
spurious tripping by inrush current by using only
transformer differential relays in which an inrush current
filter is used.

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15 Yes

1 No

What are methods to avoid the inrush current at the time of starting of power transformer ?..

Answer / vinothbabu.k

BRFORE STARTING ON THE TRANSFORMER WE SHOULD SWITH OFF ALL
THE OUTGOING FEEDER FROM THE DISTRIBUTED PANEL BOARD,THEN
ON THE TRANSFORMER WITHOUT CONNECTING ANY LOAD, THEN SWITH
ON THE FEEDER ONE BY ONE,R CONNECTED LOAD.THIS THE METHOD
TO AVOID THE INRUSH CURRENT FROM THE TRANSFORMER...

Is This Answer Correct ?

13 Yes

4 No

What are methods to avoid the inrush current at the time of starting of power transformer ?..

Answer / mukhesh

their is no chanses to avoid the magnetic inrush currents
in p t/f by wn inrush curens come the t/f will doing the
vibrations to avoid vibrations steel chains are fixced

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What are methods to avoid the inrush current at the time of starting of power transformer ?..

Answer / makku

we can reduse inrush currrent by using winding having high reactance

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What are methods to avoid the inrush current at the time of starting of power transformer ?..

Answer / priyan

You can reduce the second harmonic by using the DELTA
connection in the CT’s but I prefer to play with the
protection relay parameters, in this case it is better to
control the differential current, there is 2 slopes for the
differential zones, try to increase the slope N01 to get
passing the inrush current.
By filtering the 2 nd harmonics, refer to relay co
ordination and set the values

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1 Yes

2 No

What are methods to avoid the inrush current at the time of starting of power transformer ?..

Answer / vijay

apply a coil before applicable circuit

Is This Answer Correct ?

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7 No

What are methods to avoid the inrush current at the time of starting of power transformer ?..

Answer / karthikeyan

Its recommended to install an CLR (Current Limiting Reactor)
befroe the Power Transformer to reduce the inrush current.

Is This Answer Correct ?

3 Yes

7 No

What are methods to avoid the inrush current at the time of starting of power transformer ?..

Answer / a.kossay

TO AVOID INRUSH CURRENT IN TRANSFORMER WE MUST USE A
VOLTAGE SENSE RELAY TO MONITOR THE VOLTAGE PEAK , SO WHEN
ITS VOLTAGE PEAK THE C.B CAN BE CLOSED AND INRUSH CURRENT
WILL BE LIMITED

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7 No

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