Answer / srinualn117

purpose of checking IR value is to find,the insulation
resistance between the phases of winding and with
respective to body also.
Minimum IR value required is for 2megaohms/1KV

Answer / deena

it is check for insulation of windiig between the ground

Answer / prasang

IR is tested to check the soundness of insulation resistance & freedom from earth leakage faults between phase to phase, phase to neutral, phase to earth and earth to neutral...

Answer / bsoni

to chake the winding insulaions & likage of winding

Answer / udaya17

is it to check open or closing circuit of the motor windings

how could we calculate the no of outgoings from a 800 watt distribution board

0 Answers   United Engineering,

what is meant by distance protection ? how distance protection relay function ?

1 Answers   ABB,

1 HP = how many kw

9 Answers  

I have 2500KVA transformer delta/star,13.8KV/380V provided with LV 4000A breaker. Already I have 2300KW motor feeder with a full load 90%. Is it possible to connect another 1600A from that breaker? If so how the calculation is done?

0 Answers  

Neutral to earth and phase to earth voltage how much.

2 Answers  

how to find the starting current of the motor?

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If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables

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what is the difference between contactors & relay.

2 Answers  

How many types oil using in transformer ? How many letars using in transformer..?

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What are the maximum and minimum ratings of MCB,MCCB,ACB,OCB,VCB and SF6 breakers?

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in 33kv/11kv stepdown t/f why should we use Star point

2 Answers  

how can we understand that where we have to use ac or dc coil for solenoid valve and why?what is the different between coil of ac and dc explain please.

0 Answers   TK Group,