what's the different between ELCB, ELR and ELS?

1 Answers   CP,

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Can a 150 kva 3 phase,440v/230v delta-wye connection stepdown transformer can be used in reverse as a step up tranformer ?

3 Answers   Meralco,

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In star delta Schematic can we connect OLR in delta circuit

2 Answers   ABB, Lanco,

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what you mean by transformer neutral earthig

1 Answers   IOCL,

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what is the difference between LATCH and FLIP FLOP

4 Answers   Wipro,

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a new 3ph induction motor doesn't rotates their ratted speed, why ?

2 Answers   Sail,

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Assume a condition such that two motors of rating 6.6kv,415v are connected to blower,so tell me which motor draw large current give appropriate reason?

2 Answers   NTPC, Student,

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what is the saturation point of crgo lamination.

0 Answers  

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In 110V DC supply,if a closed circuit gets open, How can we identify the voltage which is measured after the resistor(4KOhm) which is open with negative.it shows 55V +ve when measured, also the actual positive source is 55V +ve .Because there is no voltage drop in open circuit. How can we identify whether this is the voltage which is series with the resistor or the DC source direct +ve.

1 Answers   GE,

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what is meant by loss of field in a DC motor? how a universal motor works?

0 Answers  

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What is meant by Guard relay ?

2 Answers  

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why neutral grounding transformer is used for generator and why it is not used for transformers?

2 Answers   UPCL,

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