can anyone plz tell me in 3 phase induction motor, whare we use STAR CONNECTED MOTOR and whare we use DELTA CONNECTED MOTOR

3 Answers  

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1.why ACB is not connected in HT side what Happens? 2.how much voltage maintained in ACB breaker? 3.OLTC is connected in primary side in case secondary side connected what happened?

3 Answers   L&T,

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if we use contactor & MCCB both in a feeder.in this feeder rating of contactor is higher or lower or same of MCCB rating & why?

1 Answers  

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why cannot we use a freuency more than 400hz is used in aircrafts?

1 Answers  

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1 HT service how many LT Service

1 Answers  

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whats is the role of power factor in designing a tariff structure?

1 Answers   IIT,

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An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The slip when motor stalls is A 1 B 0 C 13.33% D 10.33%

0 Answers  

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VCB in closed position during opertion if vaccume break then what will happend? it has any protection ?

1 Answers  

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Why transformer rating in kVA not in kW?

5 Answers   ABB,

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WHAT IS MEANT BY TV TERMINAL IN 500MVA TRANSFORMER?

0 Answers   KPRS, L&T,

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We wish to test 60 Hz systems from a 50 Hz supply. To acheive frequency conversion, we use a VFD. The VFD powers 40 kVA transformer, which has motor and non-motor loads on it. Will the transformer work?

2 Answers   Suzlon,

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I want to know that a 160kva diesel generator contains capacity of 160kva on each phase like R=160 Y=160 B=160 total RYB=480kva or it is total capacity of all there phases like RYB=160kva ... thanks in advance ...

2 Answers   jlpl, JP Saraswat Engineers,

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