What is PIR (pre inserting resistance) in 400kv EHV SF6 BREAKER? Why it use?

1 Answers   Adani,

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On a 6 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 42 AH). What Shall be the current rating of DC MCB ?

0 Answers   TNEB Tamil Nadu Electricity Board,

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how to calculate the mf of kwh meter,if ct the ratio on meter is 100/5A

2 Answers  

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how to read idmt curva

0 Answers  

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Can anybody tell me what the breakdown voltage is for air and what it is for transformer oil please?

4 Answers   Pooja Cables,

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a wire in which bulb is connected there is two terminal when one terminal is connected to phase than why the value of current shock in nutral terminal is max. or large??

4 Answers  

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what are difference between indoor and out door substation

1 Answers  

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Is there any other method of damping the oscillation in a synchronous motor other than using damper winding and if yes what is it?

2 Answers   IOCL,

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What is the difference between EARTH & NEUTRAL?

13 Answers   L&T,

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why rating in KVA and KVAR?

4 Answers  

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A 11 KV motor is working. if the supplay is fail. what will happened with it's breaker? Trip / remain the same condition?

4 Answers  

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the power loss in an overloaded line is mainly due to? a. resistance b. capacitance d. inductance d. none

4 Answers  

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