Answer / abhi

i think the arc quenching in sf6 is better than vacuum. so for 33kv vacuum is usedc whereas for 132kv sf6 is used...

Answer / sathyamoorthy r

my idea 132kv vacum circuit breaker ,vacum create is most costly & difficult compare sf6 so usely sf6 and low kv use vacum . another difficult arc quencing medium is high for sf6

what is the effect when the shunt field winding is opened in dc shunt motor (i) at the time of starting ? (ii) in running condition ?

4 Answers  

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Can a transformer designed for a particular voltage and frequency rating be used for different set of mentioned ratings? Assume that the winding does not get burnt because of overheating at higher voltage. If yes, then under which constraint it is possible?

1 Answers  

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How can we calculate the power factor of an electrical appliance ? Is there any formula ? Is there any meter around to calculate it ? And how to use that meter ? thanks

2 Answers   Essar, Philips,

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If auto trip is operated, can you close the breaker.

2 Answers   KSEB, L&T, Siemens,

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Will u plz give me simple diagram for tube light connection & also function of chock?

8 Answers   Bhushan Power Steel, Dalmia Group, Jindal, Practical Viva Questions, TCS, Windmoller,

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why we are using earth pit in sub stations.?

0 Answers  

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what is AH of battery

6 Answers   NSIC,

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1 HP = how many kw

9 Answers  

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in elevator industries , how to calculate the required KVA for the elevator (elevator spec- 40A module , motor of 13.5KW, 20A)

1 Answers   DLF, Tata Steel Limited,

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In our plant we are having 6.6 v motor wih MV drive running frm last two years.udenly at some speed motor getting vey vibrations what is the problem

2 Answers   ITC Infotech,

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Why are calling leading power factor is a capacitive load?

1 Answers  

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what is swirl induction in i.c engine????????

1 Answers   Ashok Leyland,

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