Answer / k.prakashchandra

They are also called bypass isolators which are connected
across an equipment especially CB to bypass it for certain
operation.

Answer / er.gurpreet singh

the isolators connected in series for isolating the
particular equipment from the system while the isolators
connected in parallel are used to connect that particular
equipment to earth.they are also called as earth switch.

Answer / k.prakashchandra

Series isolators are in series with the equipment for
isolating it,parallel one is connected across the equipment
to bypass it

why PT transformer primary r the grounded?

2 Answers   L&T,

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Can you any explain about active,reactive and apparent power in power system with example.

1 Answers  

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SSC JE ELECT.

1 Answers   CPWD, SSC,

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how to calculate the kw, Amps consumed by a capacitor, give me the formula for KVAr into capacitance,KVAr into KW & KVA, Amps

3 Answers  

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what is the easiest method of short circuit current calculation ? pls. derive with a mathematical example in real life application.

0 Answers   Mepax, NEPCO,

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how to test the turn ratio of 3 phase transformer using volt meter shoe the curcit diagram.

0 Answers  

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Why does not AC excitation use in rotor of AC Generator instead of DC excitation?

2 Answers   A2Z Group,

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hi.. i am krishna. i've complide my diploma engg.in electrical.i applied many places for jobs.but i am always fear from written test.ican't get success in it. i think my basic engg. is weak..show me some idea please..!

5 Answers  

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Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.

0 Answers   HAL,

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what kind of material to be used after ngr unit? cu or GI

1 Answers   Michelin,

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please tell me when we start motor without load in star or delta connection whose current above condition,pl write formula

0 Answers   Foxconn,

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An 11kv system consisting of an underground cable to a sub station about 300 meters away was shut down for about 10 hrs. On energising, it tripped off on earth fault about 10---20 mins later 6 times but since than it is not tripping.its already 3 weeks now. The SPAJ was found to be fine. what could be the cause.No test had been done to determine the cause of the trippings till now because of demand.

2 Answers  

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