Answer Posted / v.venkata ramana

DELTA Connection

as for long transmission it is economical to transfer power
with 3 wire

What is the maximum No. of out going mccbs permitted from an LV distribution paqnel? What is the ampere relation between incomer and out going switch gears/mccbs?

2010

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Don't you have similar question banks related to Oral Certification Examination conducted by Mercantile Marine Departments / Directorate of Shipping, Ministry of Shipping for Electro Technical Officer?

1619

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If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these

1956

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If the earth is a good conductor of electricity, why don't people get shocked every time they walking on earth?

1731

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how copper and aluminium wires or cables are choose for current rating? please provide copper and aluminium wire selection chart for different current rating ?

1968

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Can RCD's used to protect the VVVF drive if not why.

2091

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Whether should be the oil level in OCTC transfomer? It should be upto winding immersed completely or should be upto tap changer s/w? How it will affect the performance of the transformer. Rating may be 33KVA

1789

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How to calculate the heat load for a electrical room

3023

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State kirchoff voltage law?

1082

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I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF

3976

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What are marginally stable systems?

1047

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what ispositive, negative, zero sequence impedence?

1982

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What is the relationship between voltage,current & frequency?

1715

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What is the rotor frequency of 10 Hp 1440 RPM 50HZ 415V ?

1877

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i have attended the interview on 4th June,08 at Kolkata in IOCL, can anybody tell me what is its result

1925

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