Answer / ram kumar singh

It is used in HT installations.Arc quenching medium is
vaccum.VCB has one fixed contact and another moving
contact.Vaccum aprox.above one mili bar required.IR value
of Vacuum CB will be very good when open condition.Surge
suppressor is required in series .Contact make & break in
Vaccum.Dieclectric strength becomes very good in VCB.It has
more details.

Answer / santhosh samy

Vaccum Means Notthing In A Working Period The Circuit Will
Be Any Sparking Due To (Short circuit)Period It Will Not
Accept Burning Process Becaus No Air Means How To Get A
Fire ok Its My Openion

if we have 380 KVA DG. how to calculate Power Factor. With detailed formula

1 Answers  

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The speed of a dc motor can be controlled by the variation of 1. armature voltage. 2. field current. 3. armature circuit resistance. 4. angle of brush shift. Which of the statements given above are correct? (a) 1,2 and 3 (b) 2,3 and 4 (c) 1,3 and 4 (d) 1,2 and 4

1 Answers  

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What is differential relay? How it operates?

1 Answers  

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2 Answers  

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How to select the rating of the Transformer?

2 Answers  

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0 Answers   npcc,

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0 Answers  

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Can we use the Poly Phenly Sulphide instead of Poly Phenly Ether? Do clarify your opinion.

1 Answers  

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I AM INTERESTED TO WIND A 3 PHASE MOTOR HOW I CALCULATE TURNS, PITCH,AND WIRE SIZE FROM STATOR DIMENTIONS

0 Answers  

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0 Answers   Avalon, SVS,

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What is motor type DG starter

5 Answers   EFS, HDFC,

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iam working in power plant. In hot places tube lights are glowing at the end portion only. what is the reason for that?

0 Answers  

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