Answer / sanjeet kumar singh

Megger is used to check whether the insulation is ready for
bearing the nominal voltage at which the equipment is to
run. Since, a 6.6KV motor is to face the voltage of 6.6KV;
hence it is to be tested with 5KV megger. On the other hand,
if you measure the megger of 33KV transformer with 500V
megger, it means that you are giving the pressure of 500V
only to a system which is claiming to be sustain 33000V of
pressure. Hence, the test becomes meaningless, because you
are giving only 500V to a system which has to bear atleast
33000V. In addition, we should also know that basic meeger
voltage are: 500V, 2500V, 5000V. Above that you have to go
Hi-POT test.

Answer / praveena k

Slipring induction motor is a heavy motor that winding is heavy voltage carrying

Sir, plz tell me the relation b/w KW and frequency in Variable frequency Drive?

2 Answers  

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how a circuit breakers work at fault condition .plz give a specified answer.

1 Answers   Regen Powertech,

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the distance from my office to d.g is aprox 400mtrs and voltage drops ibn my office near about 40 volt what should i do p[ls suggest.

4 Answers  

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for same rating of a transformer and induction motor which one will have higher magnetising current flowing?

2 Answers  

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HOW MANY POLES ARE THERE IN 3 SLOTS PER POLE PER PHASE MOTOR

2 Answers  

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why we are calculating the capacitance between phase(conductor line)and ground in transmission line?why cant we calculate capacitance between the phase and the nuetral line?if so what is procedure.

1 Answers   Mytrah Energy,

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How can calculate the daily electrical consumption of 7.5 HP motor, if the moter runs 24 hrs continiously. Also have to know about 3.5 hp chiller.

0 Answers   Wipro,

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what is the concept of star delta starter?

7 Answers  

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what is the main difference b/w contactor and relay

2 Answers   Pace Pharmaceuticals,

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what is the difference between inductive load and capacitive load?give me some examples in general

3 Answers  

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for a 500 KVA connected load, I calculated 30% of capactor for power correction. Even after using 225 KVR capactor PF is not improving. What could be reason for low Phase correction factor?

0 Answers   Power World,

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I am having a DG set.The 415 V from Generator is step up to 460 v and then the same is used for Induction furnace. before Step up, I am connecting LT load to my factory use. When Induction furnace is in service from DG, when i try to start a motor, the generator is tripped.Please tell me the reason.

3 Answers  

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