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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Corona occurs between two transmission wires when they (a) are closely-spaced (b) are widely-spaced (c) have high potential difference (d) carry d.c. power

2 Answers   Power Grid,

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How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks

1 Answers   Siemens,

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Why Generator rotate only clock wise ?

8 Answers   L&T,

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What will the effect on a motor designed at 60 HZ, and operated on 50 HZ ??

8 Answers  

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difference between power surge and switching transient

0 Answers  

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How to calculate amount of copper used in a motor (AC&DC), generator and transformer? Datasheet provides power rating and mass of the equipment....can we somehow use this available info.

1 Answers  

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Why DG self motor winding burnt out?

1 Answers   Aegis,

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UPS battery Back time = no.of Batteries * Ah of the Battery / output KVA * 130 ? what is the 130 means ? can any one help? because all are using this formula how its came 130?

2 Answers  

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What is the permissible value of earth resistance!

11 Answers   Torrent Power,

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What is the knee point voltage of CT-100/5,15VA,5P20 ?

3 Answers   ERL, NTPC,

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what is the formula for calculation of sac?

4 Answers   TCS,

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