how we can varying the speed of dc motor ?

6 Answers  

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i HP = ?? 746 watts or 735.5 and how??

1 Answers  

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why do we use magnetic contactors ?circuit breakers are not enough?

5 Answers  

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How is the connection of the tap changer on the HV side been made?

0 Answers  

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sir , what happen if we decrease ( approx 3 inch ) the lenth of shaft in 110KW Induction , three phase motor. actually a 110KW motor is couppled with star couplling to 120TR compressor. When we doing maintenance in compressor it is required to skid the motor backword and resulting dis- alightnment . so we want to change the tyre coupling in place of existing coupling. so it is required to cut off the rotor aprox 3 inch form driving side.

2 Answers  

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why supervision relay is used in incoming feeders?

1 Answers  

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can anyone tell me can the electromagnetic waves can be reflected back?if so how &by which material it can be reflected back?please tell me so that it can help to my wireless power trasnmission device.

0 Answers  

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If an induction motor is restarted before its rotor stop rotating, then what will be the amount of current drawn? Is this current will be the same as motor starting current?

5 Answers  

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what is the acceptable earth resistance value ?

4 Answers  

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why all selected supply voltages are multiple of 11.i.e440,11 kv,33 kv,66 kv,110 kv etc

6 Answers   Suzlon, TCS,

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in 220 kv substation,what is the mean of avr voltage reading? means at oltc temp. 36 the avr voltage was 109v.so what the mean of 109v

1 Answers  

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What would be the size of wire used for 2 Ton of window A.C?

0 Answers  

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