Answer / loganath

Winding differential protection, thermal overload, negative
sequence(unbalance), locked rotor, excess long start,
Instantaneous over current, earth fault, bearing,stator
winding temperature monitor

Answer / gowtham

High precision current transformer is used to trip the circuit breaker.for low rating motors current transformer is not required to trip the circuit breaker.

WHY THE DIMENSION OF TWO SAME RATED MACHINE IS DIFFERENT ?

0 Answers  

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How seriving & testing of the HT & LT breakers are done. What are the standard Ir values on which we can come to know the test is passed or failed?

0 Answers  

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Explain the function of VFD

10 Answers   Dalkia,

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what happens when back feeding supply accidently collapses with normal supply ??? How?? [that is sometimes in a substation 11kv feeder if their ws long time permit work, back feeding supply will provide from nearest substation... if accidently after the permit work,they charged the feeder without removing back feeding wat will happen...?]

1 Answers   KSEB,

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how calculate cable size in squre mm, when the load is given by in kw? do u have current rating chart of elctrical cables?

4 Answers  

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what happens when back charging of transformer is done for longer period

1 Answers  

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We need to current density & short circuit calculation at 65kA for aluminium & copper busbar.

0 Answers  

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what is use of reactive power in ac ckt.

2 Answers  

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why we generate 11kv power supply in generating station?

1 Answers   DBG, NTPC,

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What is the LUX

2 Answers  

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howmany electrician should maintain for a 1000 kva used plant... in kerala..

0 Answers   Godrej,

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what is difference between co-generation and captive power plant?

3 Answers   TATA,

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