Answer Posted / brd ganesh

We can use dol stater up to 5HP (dol stater can
not control starting current of motor but protect
by them up to 5HP). We have been using dol
staters to lower rating ac motors due to low cost.

What is the difference between PS & metering CT (5p20,0.5 etc.)? Why in PS class CT only Vk is given ? Is PS class CT is more accurate than metering CT?

1125

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How to check the cable fault / hv test of transformer cable.

1880

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A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is observed the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?

2321

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WHY IN AC DRIVES,INPUT PHASE CURRENT SHOW UNBALANCE?

2301

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What is an Air COmpressor

2246

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Why you are switching off arc protection mcb when you are taking shutdown for lv board.

1697

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WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.

2072

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how does grading rings & spacers in transmission line works? Working Principle?

2087

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Testing procedure of DG alternator stability test

1564

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why occ characteristics curve in not tracing back when we are bringing back the rhoestat?

1870

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we have two motors 1250kW,6.6kV to be coupled on the same shaft ,so please provide assistance for their synchronisation.

2065

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What is the method to solve circuit using source transformation?

1149

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can we install HT panel & LT panel side by side or how much clearance is required ?

1594

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What are the reasons for the parallel operation of transformers?

1128

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Can any body tell me the different types of LT cables & their application.

2105

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