Answer / m.shoaib

Isolator is divise for energiz and disenergize of circuit and circuit breaker is divise for on load triping

Answer / ashokkumar

Isolator is opens the supply line at both ends (In and out
terminals)so the supply line is disconnected at both ends
MCB is open at one side only

__ \__ ----o / o----
In out
MCB Isolator when it opens

Answer / gaurav

Isolator means for two one phase & one neutral & mcb stands
for only one phase.

HOW TO CUT A CAKE IN 8 PIECES IN 1 STROKE

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what is impedence voltage

1 Answers   Thermax,

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what is green house effect?

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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)

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explain the process of commutation in a dc machine. Explain what are inter-poles and why they are required in a dc machine.

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in Contactor opearation Why there is a difference in the values of the operate and release voltage in case AC supply

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Q2). When 3 dice are simultaneously thrown, which of the following would be obtained? (a) Result 1: “A 5, a 3 and a 6” (b) Result 2:” A 5 three times” (c) Result 3:”A 5 twice and a 3” (d) All three results are equally likely. (Musigma Question)

2 Answers   Mu Sigma,

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Amoung all types of short circuit faults in a transmission line which one has less number of occurance and why?

1 Answers  

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how much distance is required for earth pit to earth pit in substation???

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Which type of material used for fuse wire & solder wire.

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WHAT IS THE COOLANTS IN TRANSFORMER?

7 Answers   Bhel,

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Generally In transformer Tap Changer on HT side, but I have seen in 66KV side in 220/66 KV, 100 MVA, Areva make transformer. Why ?

7 Answers  

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