Answer Posted / subbu

normally the genaration station genarates only 6.6kv it is
step up and sen to near substation then we r using
6.6kv/11kv it for avoiding lossesi.e eddy current.then we
step up/down as per load on the feeder

If the feeder rating is 7.5 kw or 10 HP star-delta feeder, MCCB is taken as 63 a, contactors-32 a, how much will be the OLR rating or which range OLR should be considered when we concern about type-2 coordination?

2362

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Pls Breifly explain about UPS (Inverter,Reserve,Rectifier,Float voltage,Boost voltage).

2826

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If symmetrical fault occurs at the terminal of a synchronous motor then how the motor will act...explain it..

2201

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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.

1229

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There is any especial requirement for motor to drive through with VFD?

2651

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What is the diffrence (Technical & Construction ) between CBCT & Normal CT?

2083

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Why the unit sizes of hydro generating machines are not standardized as in case of thermal powerplants?

1150

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what is formula to cal cute earth pit numbers and size of earth strip used in earthing?

2268

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what is the terminal voltage of dc series generator running at rated speed at no load?

7734

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why it is not advisable to run low rating (19KVA) DG sets in parallel for long durations even though they are provided with droop ckts (QDC)

1959

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What is mason's gain formula?

1360

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What is proportional controller?

1350

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Why lose 1 phase voltage in 33kv to 415v stepdown transformer

1790

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To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?

1968

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In CTs tan delta point should be earthed , what is the reason behind it?

3082

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