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)

Which of the following connection is best suited for 3-ph, 4 wire system A delta-delta B star-star C delta-star D star-delta

2 Answers  

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What is the speed of 3 phase IM(Induction motor) at no load? How will the Motor meet the increased load(Explain through fundamental)?

2 Answers  

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During he starting up of the motor, the upstream's MCCB (350A) always trips due to the UVT relay activated. Can Star-delta starter use for a 20kW Motor (For a powder mixer machine) cause voltage-dip in the supply line voltage? If so, what are the recommended solution to eliminate/reduce the transient voltage dip in the line voltage?

4 Answers  

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6.6 KV /.415KV Step down trf. we can get 6.6 KV from primary by applying .415 KV secondary side by same TRF.

3 Answers   Suzlon,

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What are the components of a substation?

3 Answers   IOCL,

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what is the diff.between neutral and earth?

4 Answers  

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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  

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How the neutral earthing is connected in DG alternator

6 Answers  

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What are high pass filter and low pass filter? and What are the flowmeter ?

0 Answers  

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what are the points to be consider for MCB(miniature circuit breaker selection?

3 Answers  

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What is OLTC in transformers and what is its function?

4 Answers  

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what is the basic principle of operating of a television camera tube?

0 Answers   Student,

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