what is the difference between single core,three core,three and half core and four core, and where it can be used ,

1 Answers  

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If i have two 3000 kW motors and the whole facility requires a 10 MVA transformer. What would be better installing two 5 MVA transformers(one for 1 motor ) or just a single 10 MVA transformer for both of them. Give reasons for your answer.

4 Answers  

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what are the safety of chiller.

7 Answers  

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For high voltage and low current Circuit Breaker preferred is vacuum circuit breaker.why?

1 Answers  

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How to put breaker in service / test position.

1 Answers   KSEB, L&T, Siemens,

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Dear Respected sir how to test ABB REX521 protection relay by relay tester.

0 Answers  

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what is the difference between elcb and rccb ?

0 Answers   Trident,

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What is VFD, and how its work

5 Answers  

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why the voltage transmission is always in a multiple of 11? e.g. 110 V, 220 V, 33 kVA, 11 kVA

16 Answers   IAF, MahaGenco,

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dear all, in motor operation , motor is of 100 hp and bimetal relay setting is 130 amp, if relay is getting tripped on 120 amp balance current what can be the reason? Relay is newly replaced. I dont know but is there any frequency effect in thit case? Can frequency variation affect bimetal relay operation?

1 Answers  

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what is voltage gradient?

8 Answers   Bhel,

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how can i find ct ratio of meter by seeing name plate of meter and how it should be used in MF calculation if it shows only-/1???

0 Answers   Harshal Electrical,

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