what is the purpose of commutator in DC motor?

3 Answers  

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our plant maximum demand has 500 kva.need to suggest me to maintained pf 0.98.how much capacitor bank will be connect to the supply line.

1 Answers  

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i want to do a project on PLC.... please give me an idea.....

1 Answers  

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why current transformer secondary is short circuited an what will happen if connect very high resistance acrossthe secondary side of current transformer?

1 Answers   NPCIL,

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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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How can we calculate ac current from the given DC current when AC voltage is given?

0 Answers  

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what is a vector protection in transformer

0 Answers  

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what is the significance of cabability curve of alternator

0 Answers  

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what is the difference between diode and zener diode?

21 Answers  

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I have raw material for making Compact-Choke for flourscent lamp of 40 Watts. We are suppose to get 0.4 amps output at end. but we are getting 0.42 or 0.44 amps and above. We have done many testings in different but nothing worked out. Please suggest me how to get the correct output. We are using 1. core winding of 700 windings of aluminium 2. E-shape iron fillings and I-shape iron fillings to surround the winding.

6 Answers  

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Why we say three phase voltage 440v.

2 Answers   VDP,

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in a diesel generator is there any relation between AVR to fule system?

2 Answers  

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