fazal ur rehman


{ City } kabul
< Country > 0
* Profession * manager technical
User No # 60624
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Questions / { fazal ur rehman }
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In power generator sets, when they are coverted from 50hz to 60hz, the kva rating after conversion increases. For example, the manufacturer of a perkins 200kva @ 50Hz generator set has mentioned it to become 220kva after converstion to 60hz. What is the relation between the frequency & the KVA rating. Any formula please.

 3 Electrical Engineering 6529

Can we use same copper cable for both AC & DC power.

3 Electrical Engineering 4826



Answers / { fazal ur rehman }

Question { Essar, 22293 }

What is Earthing?


Answer

Yes, Hm is absolutely right

Purpose of earthing is to provide a low potential path to
fault current which result in tripping the protective
device & thus cut off the supply. Once the supply is cut
off, both equipment & operator is safe. But remember
earthing witout the use of protective device in the circuit
is of no use.

Is This Answer Correct ?    15 Yes 3 No