Answer Posted / rd dadhich

1.It is very common practice to use battery with charger for
protection , operation & indication in HT switch gears due
to most relable system to work as after charging only
battery comes directly in line during failure of AC supply.
or power supply.

UPS can be used theoretically , but we are adding one more
week link in critical protection supply due to addition of
inverter. , as inverter is :-

AC supply . > Battery Charger > Battery > Inverter

Where as battery charger is only :-

AC supply . > Battery Charger > Battery

2. AC coils of tripping & closing are un common & bigger in
size.

prove that power consumed in 3 phase delta system is 3 times as compared to 3 phase star system

2276

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High voltage test procedure of in swgr board. why should measure millivolt drop on testing time?

2101

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What was the Dg set radiator and lube oil temperatures trip in ACB

1831

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What current position are you holding in your current company?

2078

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explain different types of d.c motors?

1154

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Advantages of using generator circuit breaker (GCB) scheme in a power station ?

5281

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what is the working process of over & under voltage relay.

2226

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when it is possible kvrah lead & fundamental kwh be equal in electonic trivector meters (3 ph)

1997

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how can tell us the AC indoor or outdoor which Tr and formulls

1766

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What is the difference between a fuse and a breaker?

1141

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hello!my name is sheikh iam preparing for indian engineering servieces,please send me the old question papers..to sheikhshaazforjobs@gmail.com

2087

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WHERE NEUTRAL WIRE IS CONNECTED AT DOMESTIC TO TRANSMISSION LINE(SINGLE PHASE TO THREE PHASE)

1837

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What are IR values and what it should be for coil and for insulator

2999

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why the frequency and voltage in india is 230v and 50HZ. when compared to USA say 110v and 60 HZ.

1448

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What is conventional thermal current (Ith)

4444

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