Hi My dear all Friends, There is a question regarding HVAC Engineering and widely used in Power Projects. Question- What is the diffrence Between REF, SEF and Differential Protection....???? Where REF - Restricted Earth Fault SEF - Senstive Earth Fault.

0 Answers  

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if we convert Ampers into kva,which one formula use by us,pls tell me?

10 Answers   ABB,

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How a capacitor discharge weld power supply works? what is the use of a pulse transformer?

0 Answers  

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comparision between ACB and VCB

0 Answers   Lupin,

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What is the Operating Powerfactor of UPS??? Why??

3 Answers  

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what is phase to phase voltage? what is line to line voltage

46 Answers   Exmar, HBL Power Systems,

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how much allowable resistance that can be difference in motor all coils?

0 Answers  

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To determine the Healthiness of Insulation we will be performing Dielectric tests i.e Insulation Resistance test, Partial Discharge test,Switching Impulse, Lightning impulse, Tan Delta test ...etc why we required to perform this many test, why cant we do only one test. for Transformer, CT's

1 Answers  

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why ac wave is sinusoidal not square or triangular wave what will be reason

1 Answers   ACPL,

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what is the function of choke and starter in a tube light?

2 Answers  

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I have AC automatic voltage regulator 15KVA What output currant?

3 Answers   Siemens,

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What it indicates by 25/41MVA on transformer?

4 Answers  

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