Answer Posted / varma

TNC is a 3 position switch used for closing or tripping a
circuit breaker manually from panel locally. TNC siwtch
returns to Neutral position after any operation.

How we can come to know the substation range,without go through any name plate ?

2115

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why wire sizes are 3/29 or 7/29 and why not wire sizes are 2/29 or 6/29?

5154

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why transformer ratings in kva? & DG ratings in kva? & Motor ratings in kw/HP?

1515

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WHY CBCT USE ONLY IN Y PHASE NOT OTHER PHASES

2117

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We have a distribution transformer of 750KVA/11kv/440v and an AVR (Servo Stabilizer) of 750KVA on the LT side of distribution transformer. Also we have an ACB of 1200A on the output of distribution transformer (that is on the input of AVR). We want to have an MCCB on the output of AVR. What should be the rating?

2105

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What is PQA???Applications........

2394

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Define active and passive network?

1150

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What is center gravity load in substation?

2424

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what is difference between cpp electrical system and refinery electrical system

2305

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Why is the air gap between the pole pieces and the armature kept very small?

1406

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Starting Time of LT & HT Motor

1958

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The SFC of an engine is 0.25 kg/kW hr. when the fuel used has a calorific value of 36000 kJ/kg. the thermal efficiency of the engine is

1976

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What is the difference between UPS & inverter ? which UPS is better and whos got the edge ? what is the difference between & inverter ? which UPS is better and whos got the edge 12 V , 24 V , 36 V etc what are the advantages of 12 V, 24 V , 36 V etc and what are the disadvantages of 12 V, 24 V, 36 V etc thanks

1909

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calculate external resistance values to add to the rotor of a slip ring induction motor. STATOR- 415 V, 3 phase delta, 1100 A, 50 Hz, 1490 rpm, pf 0,86 ROTOR - 660 V, 590 A, 50 Hz. STATOR current at each steps STEP1-600A,STEP2- 800A,STEP3-1000A,STEP4-1100A.

3571

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which VFD is better ( LT or HT)

2072

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