Answer / farhan hashmat

ELCB mean earth leakage circuit breaker,and it is the old
name of RCCB(Residual current circuit breaker, further ELCB
is voltage depended operation and RCCB is current depended
phenomena.and MCB is miniature circuit breaker which is
operated on thermal or magmatic effect of current.

Answer / guest

ELCB

how we check vector group dyn7

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How much allowable difference current between on three phases Dear sir, We have a 1870 KW HT motor, 11 Kv supply,FLA-120A,2870 rpm,2-pole squirrel cage induction Motor.And stator is connected in star connection with Liquid resistance stater to limit the starting current.It has coupled with Centrifugal air compressor.My question is it is loading 73% of FLA taking R-phase 86.7 A, Y-phase-85.4A,B-phase- 78.3A.why the B phase current is that much of difference.Is it allowable, or any one tell me how much allowable current.If any method to calculate.

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Essential condition for parallel operation of two single phase transformer is that they should have same A polarity B kVA rating C voltage ratio D % impedance

1 Answers   wbsedcl,

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Why PT burnts?

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I am an electrical engg and has got selected in wipro should i go there now or try in some core company ?

3 Answers   Wipro,

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Hi If connecting a temp generator 670KVA .415kv with step up Tx .415/11kv. I am given Generator impedances Z1 Z2 Z0 to 100MVA base. Do I need to work out the generator fault current by using these impedances i.e gen rating / impedance. Then use this as my source impedance for the calculations that follow.

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What do you understand by avr?

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why voltage swells and dips in transmission line?

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why the substation require din electrical system?

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The rotor current is directly proportional to slip. How?

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How to maintain ac plant?

0 Answers   HCL,

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what is the difference between R Y B windings in three phase.does it differ by construction or by number of windings?Explain the difference between them.

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