Answer Posted / aashish

pf is maintained to close to
unity....to avoid leading pf
operation when lightly loaded....to
save enrgy monitorng is necesary..

What are test values for an 63 KVA and 100 Kva Distribution Transformers for the following typical tests 1)Magnetic balance 2)Short circuit test 3)Open Circuit test 4)Vector group confirmation test .please give me the standard values for all the above tests.

2773

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previous year paper of ntpc bhel for degree in electrical enng

3272

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Two bulbs of 100w and 40w respectively connected in series across a 230v supply which bulb will glow bright and why?

1116

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dg started in plc mode and load taken later one battery terminal connection will be disconnected by loose connection what will happen for dg and shall we connect battery terminals while dg in load time?

2135

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what is integrated ac contact circuit

2140

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explain me the relation between torque, frequency,speed,voltage and current in the 3 phase induction motor?

2302

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The ripple frequency in output of fullwave bridge rectifier is a. Half the input b. Twice the input c. Same as input

2312

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How 48-relay (incomplete sequence) functions?

4172

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how can calculate 1kva generator running time in 1 liter keroscene

2662

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one split ac how can told of this ac which Tr tell me us

2088

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what are the advantages and disadvantages of oil filled cables over XLPE cables

19678

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What is the use of iron core in a transformer?

1178

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For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

2382

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why we change the direction of winding in rotor ?how we make the north and south pole?

2092

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Is there any abbrevation for STUB in Stub bus protection

1993

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