Answer / mubeen

If your load is unbalance,or distrubting to different
panels you should use Earth leakage relay not ELCB.ELCB can
be used for branch circuit or any sperate panel such as for
light, power sockets etc.Earth leakage relay can be use to
trip the breaker on calculated current.

in fuel level controller what is MOV please define.

2 Answers  

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why the armature coil in dc machine is round?? swagat k.

1 Answers  

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why we use to transmit the power in three phases intead of single phase ?

5 Answers  

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without name plate detail of blower how we can find out the HP & Rpm ? the input voltage is 230v single phase

1 Answers  

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can we use breather in a SEALED power or distribution transfomer instead of injecting nitrogen.

1 Answers  

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how to select overload-relay for perticular motor 1.for D.O.L. starter 2. for Star-delta starter ????

0 Answers   Vatika,

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why we use delta connection in transformer

2 Answers   UPPCL,

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i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.

0 Answers   SCM,

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How many types of Differential protection are there? and what the special arrangement are made at the time of charging of a transformer on the Differential protection?

1 Answers  

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Why we use two wattmeter during block rotor test and no load test of 3phase induction motor? And how can we understand the neat power requirement of from this test?

2 Answers  

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What happens if 25 Hz frequency is applied for 400/200,50 Hz single phase Transformer.Will Voltage increase ?

2 Answers   Bhel, Dawlance, IBM,

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What will happen if 40W and 60W Bulb is Connected in Series.

2 Answers  

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