What is difference between mcb and mccb.

0 Answers  

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DG lube oil and waste oil how to dispose outside and there is any authorised vendors will be there for this.

2 Answers  

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wat is d first thing to be seen 2 lay a cable in a particular area??

1 Answers  

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how work the lighting arrestor?

2 Answers  

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In the N-series schneider reclosers. What is the difference between current during fault time and current at tripping? This appears in the Event log in an event of a trip out.

0 Answers   Kaytech,

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why earth hole size is biggest in plug point?

22 Answers   Al Qabas, HCL, RRB,

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How much load with stand the copper cable by sq mm apro..

1 Answers   L&T, Taj Group,

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what is the difference between RMS & TRUE RMS VOLTAGE

0 Answers   IIT,

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How to calculate the TR (AC's)

4 Answers  

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Any one can explain if there is any harm from humming noise heard from air circuit breaker : we have 415 switch board having two incomers from transformers 3.3KV/415V , when bus coupler closed, and open one ACB incomer to work in one of the transformers, the current started hunting around 50 Amps, and heard humming noise from the air circuit breaker, although the load current was only 1200 amps while the ACB capacity is 2500 Amps, and the transformer 1600 KVA. The same didn't happen when taken the other transformer offline. Why this humming noise and current fluctuation? is there any implication or danger, bearing in mind that we just returned everything back to normal and stopped the maintenance of the transformer. Shall we go ahead and ignore this noise?

6 Answers  

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What are the effects of electrical faults?

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In electric motors, according to the no. of compartments, The no. of input's (pantagraph collector's) were increased, why?

1 Answers  

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