Answer / viraj

all are used to protect electrical equipment
in normal conduction all works as close switch but in abnormal condition they become open
vcb acb and sf6 are used with relay
vcb vaccume is used for arc removal
acb air is used for arc removal
sf6 sf6 is used for arc removal
mccb molded case circuit breaker to limit current

if there is a voltage difference between neutral and earth when we operate any instrument for fraction of time then where is problem?

1 Answers  

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What is the size of a 60 watt and 80 watt tubelight?

0 Answers  

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Voltage drop is the:(a) Maximum potential(b) Difference in potential between two points(c) Voltage at the end of a circuit(d) Voltage produced by a source

3 Answers  

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Operation of isolators.

0 Answers   KSEB, L&T, Siemens,

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What happen if you keep open the Neutral Grounding Switch in open condition of the HT Generator at starting and again on load if it open then?

1 Answers  

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We have 250 KVAR cacitor bank & our average load is 200kva but our power factor is average 0.66 how can we maintane it? how can we balance our load?

4 Answers  

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Hello friends., my question is related to testing of current transformer... A Ct having knee point voltage of 750 volts., and I have two step up transformer's of rating 230 v to 440 volts., can I obtain the value of 750 volts by using the two transformer's.... If yes then how could I connect the transformer's to obtain knee point voltage?? thank you in advance

1 Answers   ABB,

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why we avoid parallel operation of diesl generator?

4 Answers  

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In EDO ACBs what is a purpose of closing coil and motor, what is the operation of these devices are they inetconnected. means if we give supply to motor and by BCS we charge Closing coil,what exact is operation is and how it charge a spring of ACB. Sir if anybody has an wiring diagram please send me the link to operate and EDO breaker.

0 Answers   PCE,

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How power factor of a transformer is calculated

3 Answers  

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what is the exact meaning of power

1 Answers   SKB,

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what is tha between elcb & rccb?

3 Answers   Essar,

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