Answer / ravi kumar

Safety of vcb :[ Vacuum circuit breaker]
1: Earth fault relay
2: Master trip relay
3: Supervision relay
4: Short circuit
5: Shunt relay
6: Closing coil

Answer / arvind kumar

VCB SEFTY
Earth fault
Short circuit
Over current

Answer / kumar manish

VCB saftey-
1.Earth leakage
2.Current unwanted due to Short Circuit.
3.Over load

Answer / vijay raj

Oil type transfomar sefty ans dry type

Answer / bhanu pratap singh

all right

What is dc current source?

0 Answers  

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WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?

0 Answers  

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HOW DO A DISTANCE RELAY SENSES THE FAULTY ZONE.

5 Answers  

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what is hunting?

2 Answers  

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I find that underground strip-armoiured,4core,LT PVC cables in an earthed power distribution sytem are occasionly found in charred condition-with no trace of it except ash. Is this because of no proper earth connection/continuity (giving rising to high armour resistance)in the joint enroute or because of insufficient capability (again due to high armour resistance)of cable-armour to carry fault current or due to neglected /unprotected overloading of the cable or due to high armour currents caused by power thefts where only phase(s) are unauthorisely tapped & at the point of poer consumption earth terminal is established by burring underground a not so good earthing rod (or using an underground water pipe for the purpose)

1 Answers  

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in electrical control panel. how can i choose the cable rating. (example - 11kw motor, 18-25A mpcb}

0 Answers  

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how oti and wti connections are different from each other?

0 Answers  

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can transformer develop three phase poer from a single phase source?

2 Answers  

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how the reverse power relay acts..

2 Answers  

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what is the purpose of high speed earth switch in gas insulated substat

0 Answers   ABB,

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Then what do you call a transformer that is installed on the ground?"

1 Answers  

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What should be cable size for 75KVA 380/220 3ph transformer

3 Answers  

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