Answer / sak

SF6 is a good insulator medium, it takes less quenching time, thats why it is used on high voltages

Answer / hasan mehdi

Bcoz it has high arc quenching.

Answer / ankit_17aug

gas qunching good meduim then use

Answer / eedeepak

sf6 is the best material till now because it's ability to extinguish arc

Answer / manju

In ht side current is very low

In india the power supply is always in multiple of 11, eg.220 V, 440 V... what is the reason?

11 Answers   BSES, Electrical, L&T, PSIT,

how and where megger works?

9 Answers   Power Grid,

How to test and satisfy the conditions of the vector group YNd1 for power transformer?

1 Answers   Areva,

explain the working principal of the circuit breaker?

5 Answers  

What is a compensator?

0 Answers  

If the soil resistivity is more large, how can we earthing our 11 k.v. transmission line?

2 Answers  

what is shunt trip coil? what was the function in rmu?

1 Answers  

how to calculate the tarriff for an industry whose kva demand is 10 mva

0 Answers  

Brief working principle of fluorcent tubelight,function of starter & choke.

3 Answers   Havells,

When should I use earth leakage circuit breaker for incomer and when should I use it for each feeder seperately?

1 Answers  

How to check it good or bad capacitor

4 Answers   IMD, ST,

Draw SLD feeding from the SS up to distribution board of the load, calculate cable size, breaker sizes, and meter for the following case: Ground Floor: electric room, pump room, 5 shops, each is 15 KW First Floor: 5 shops, each is 15 KW Second Floor: showroom 30 KW Service Loads: water pump 3 KW (3ph) , fire pump 3 KW (3ph), and one DB service 12 KW (3ph).

0 Answers   FEWA, HMK,