Answer Posted / vignesh

Thumb Rule - all AC power sources - Generators,
Transformers, UPS etc. are rated in KVA and all loads are
rated in Watt or Kilowatt..
AND hence there is no need of power factor.

KVA=V X A (FRO SINGLE PHASE TRANSFORMER)
KVA = 1.732 X V XA (FOR THREE PHASE TRANSFORMER)

how can i determine the KVA/MVA rating of transformer precisely?? is there any standard test?????

2392

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what you have to see after one week or month from the day of installation of transformer ?

1720

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what size steel armoured cable is required to support 1500kva capacity. would 70mm squared be enough or would I need 90 or 120mm squared 3c plus earth

1385

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In control room of our one plant there is a continuously the incoming power goes to PC is vary,means in stabilizer it continuously indicate from high input to low and low input to high. what is the reason and its solution.

1974

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please send me last 5 year interview questions

2196

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a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5

1707

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how we findout a ignater is faulty or not?

2108

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What is transmittance?

1125

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why the protection turbo generators is most complex?

2046

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what is thermal resistance of PVC Cable.

1805

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what is value of Jin transformer

2100

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How to decide CT & PT ratings for a given transmission line carrying some rated voltage?

2332

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Which Class insulation is prefered for the sandwich Busducts ? Why?

2031

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we need a ntpc previous papers

1929

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hi frnds can any one help me ? plz send me placement paper of IOCL of Electrical streem .... plz send ....its urgent....

1729

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