What is the diffrence between an ELCB(earth leakage circuit breaker) and RCCB(residual current circuit breaker)?which has higher degree of safety and why?

2 Answers  

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How to test lightning Arrester?

0 Answers  

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difference between turns ratio and transformation ratio?

2 Answers  

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How to calculate % Impedence?

3 Answers   ISRO,

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if a 3phase 100kva distribution transformer , 400 v,50 hz, 4-wire system is loaded at 160 k.w mostly 1-phase Lighting & Airconditioning split a.c load what will be the net effect on the power system in terms of voltage, powerfactor, current , efficiency of xformer

0 Answers  

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How does an induction motor start?

0 Answers   Ericsson,

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what is the meaning of harmonic in AC waves and when which are prduce and what is the effects on line and give any other information about harmonics

1 Answers  

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what is KSR type transmission tower? What is LSR type transmission tower?

0 Answers   Ford,

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what is the mechanical safety of DG ?

0 Answers  

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. The string effcy in AC sys is 80% Then for same power, the string effcy in dc sys is a) less than 80% b) 80% c) more than 80% d) zero

1 Answers   Engineers India Limited,

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in small capacitor we use uf( micro farad) and in big quantity we used kvar. i want to know that in 1 kva how much will b uf(micru farad).

2 Answers  

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what are carbondioxide and dcp used in fire extinguishers

0 Answers  

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