What is IDMT relay how it works.

3 Answers   Electrotherm, Sulzer,

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In a simple spur gear train, gears with 24, 48, 32, 72 and 96 teeth are in sequence. The gear with 24 teeth runs at 900 rpm. The speed in rpm of gear with 72 teeth is

1 Answers   Caterpillar,

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what is the disadvantages of star connected alternator?

4 Answers  

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what's the thickness of 1.5sqmm wire

1 Answers   Bhel,

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?? how to calculate lighting system ????

1 Answers   L&T, Synergy,

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how can we calculate the cooper armed cable size if the protection load of main fuse is 80 ampere.

1 Answers  

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What are the conditions to be satisfied before connecting two DC generators in parallel?

9 Answers   Bhel, Godrej,

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how can i use REF and diffrencial relay both in 1 CT core for transformer protection?

0 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 is the function of fire alarm system?

5 Answers  

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What happens if i apply 500V to 440V rotary Switch ?

0 Answers  

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how to find out this one mcb r mccb?

4 Answers   L&T,

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