Answer / Deepika Kapoor

Yes, relays can be used to coordinate the operation of load break switches. The purpose is to control the sequence of opening and closing of the circuit breakers (or switches) for safe and controlled loading of a power system. This helps to avoid excessive current or voltage fluctuations during switching operations.

how many methods for starting an induction motor?

7 Answers   Hindustan Unilever Limited, Hyundai, TPL,

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A 400 V, 50 Hz, Δ connected synchronous generator has a field reactance of 0.1 Ω and armature resistance of 0.015 Ω. At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the machine’s overall efficiency? Ignore any field circuit losses.

1 Answers   VECL,

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what is the multi strand cable size? 0.45mm is area of one strand & 370nos of strand.

1 Answers  

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What is the difference between MCCB & MOCB?

1 Answers  

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why transformers not work at d.c.-

3 Answers  

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Why cannot we insulate HT over head cable to avoid ionization of air around the HT Cable?..By this we can minimise corona loss also..

1 Answers  

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what is difference between differential protection and distance protection and how we calculate the sloop?

5 Answers   OPS, Power Grid,

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What is the difference between Rectifier & Converter?

12 Answers   Bajaj,

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Describe the difference between a microcontroller and a general purpose computer.

2 Answers   Siemens,

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What is surger vector in 33Kv transmission feeder? We have AC power generator of 8MW which is paralleled with 33Kv EB grid. Some times our HT breaker gets trip off due to surge vector problem. How to over come it? Is there any device to observe the surge and avoid tripping?

3 Answers  

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what is interpose? where it is used and why it is used?

1 Answers  

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can I connect step down transformer(25KvA,240V Phase to phase)to output of online UPS(15KvA,440V PHASE TO PHASE) Load connect to TRANSFORMER is 13KvA,240V PHASE TO PHASE. please brief if it is wrong

1 Answers   DRJ ARDE,

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