how and where does star and delta connection is used ?

2 Answers  

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what is ISF

1 Answers  

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what is the illumination level required for child play area?

0 Answers  

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What happens if the capacitive reactance of a transmission line is very high?

5 Answers   ABB, Power Grid,

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How to the calculating the Reactive power ( kvar )

3 Answers  

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What is the Good Earth resistance value of G.I & Cu. Chemical Earthing & Normal Pipe Earthing?

0 Answers   ABC, Reliance Life Sciences, TCS,

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what is the advantage of using 3 phase line rather than using 2 phase line?

2 Answers   Havells,

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Three set (each phase contain 2 cable of 400 mmsq CU XLPE AWA) of single core cables are connected to 11 KV motor of 14 MW & the switch gear supplay is taken from 11kv feeder & this supplay taken from 275 KV substation. Problem is one pair cable(L3- 2 cable ) getting very hot & gland melted and damaged in switch gear side. the other two cable haven't any more hot(ambient temp only & L3 haveing 95- 100 Degree C. The same problem happened in 275 KV substation switch gear side also where the supply taken for 11 kv switch gear. But here L2 phese cable had problem. Why it is happening like this?. The cable having temperature different at different location from gland side inthe case of 11KV feeder of 275 kv substation. why ?

2 Answers  

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what will happen to give a dc supply in transformers?

3 Answers  

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while checking the flourscent tube elctrodes some glow is cominag. this type of glow tube working or not working

1 Answers  

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In Air circuit breaker LSIG protection unit is used. Without fault in cables (2 runs 3Cx150Sq.mm Copper, 1Kv grade, XPLE armored cable IR value is more than 550Mohm @ 500V Megger) and load section Long time Overcurrent protection is triggers and trips the unit. We changed LSIG protection with new factory tested unit. Even then fault is persisting. Please suggest the possible causes

0 Answers  

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i have been tasked with a design of protection, metering and control(PMC) relay panel extension to accommodate all PMC relays.There is an already existing panel where this one will be built.What are the design aspects for this kind of project? thank you.

0 Answers  

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