Answer / anitha

spark is a flash of light produced by electrical discharge
and arc is the phenomenon that occurs between the contacts
of the circuit breaker due to short circuit and also due to
large fault currents

Answer / k.prakashchandra

Arc is continuous(line) and spark is intermittent(dots)

why 400Hz is used for aircraft systems ?

14 Answers   Cabin Crew, Jet Airways,

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If a capacitor bank is having rating 750kvar for 6.6kv. Then for 3.3kv how much will be the rating of capacitor bank.

1 Answers   OCL,

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what will be the minimum megger value for 132 Kv (earthed) potential transformer

3 Answers  

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(1)For 3 No 1500 KVA transformer require on one single bus bar or need to be section through bus coupler means upto 3MVA.(2) 22KV Net work system as ring, How maney I/C required or 0ne I/C and one O/G.(3) What should be rating of VCB for 22 KV line.(4)Electrical/mechanical inter lock, why we need.

0 Answers  

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What makes the difference between 50Hz supply and 60Hz supply which one is economical and how can you support your answer...........?

2 Answers   Fertichem, Kuwait Oil Company,

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why we don't discuss power facter in dc?

5 Answers  

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There is any especial requirement for motor to drive through with VFD?

0 Answers  

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What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?

0 Answers  

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Please explain me abt PQ diagaram in the power sector.

0 Answers  

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What are the raitings of Mcb,mccb and Acb in detail ??

0 Answers   Engineering Vision,

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What is NGR . What is the purpose of 10 sec ,60 sec rating of NGR.

0 Answers   KOTC,

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why two windings are using in single phase AC motor

3 Answers  

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