WHEN SINGLE PHASE SUPPLY AS 220V, WHY THE 3 PHASE- 4 WIRE MEASURED AS 440 VOLTS INSTEAD OF 660 VOLTS (220 VOLTS PER PHASE i.e 220x3 = 660 volts ).

1 Answers  

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Explain different types of d.c motors? Give their applications

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How can one connect three source of electricity in a house..the source are 2 gen and one electricity.

2 Answers   SAUDI ARABIAN BAYTUR, Wantro Technical Services,

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How the cable size for a motor is decided

14 Answers   NTPC,

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what is over frequency protection

1 Answers  

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we have a 2000kva step down transformer at our site. The HT side is charged from 22000V. So the primary current will be 52.48A. So why the HT breaker(SF6 ABB) is rated of 1250Amps ?

2 Answers  

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hai...... tis is Hemanth. jst now completed electrical engineering... i wanna to apper for ap tranco exam... plzz send me the previous q's paper link......thanx in advance.

0 Answers  

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what is IP 55 & IP 54 ?

1 Answers  

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How many earthing pits are requier to disapper the surge current of one lighting arrester.

3 Answers  

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why transformer are rated in KVA not in watt?

7 Answers   DMRC, L&T, TCS,

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What is AMF Panel????

3 Answers   Emerson,

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What is meant by vector group

0 Answers   GPSC Gujarat Public Service Commission, VA Tech Wabag,

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