why does a dc machine has high efficiency while working as a generator than as a motor

1 Answers  

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Difference between a pilot wire and a normal conductor?

0 Answers   United Arab Aluminum Company,

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What is the formula to calculate the rating of power cable for three phase current.

0 Answers  

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upto how much low RPM we will run the commercial motor which is run through VFD without any problem occurs in motor.Motor rating Duty is S1 & RPM is 1400.

0 Answers   ABC,

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Why dc voltage used to excite alternator field in stead of ac?

4 Answers  

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HOW CALCULATE MOTOR KW, IF MOTOR NAME PLATE MISSING, WE FIND ONLY MOTOR WINDING RESISTANCE ONLY

1 Answers  

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Does all the output contacts (N/O as well as N/C) of a Numerical relay operate when relay receives a binary input/inputs or contacts are designated to specific logic input/inputs and only these contacts operate?

0 Answers  

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how we have to calculate the short circuit current for 33/11kv 2mva, 7.5% Z, Transformer primary side breaker and secondary side breaker short circuit current for both sides?.

5 Answers  

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I have a transformer 3phase 11kv/410v and its name plate missing. now how can I judge its rated kva?

2 Answers   Coca Cola,

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We have 2 11kv/433v transformers for 2saperate acb for mv panels and 1 bus coupler acb. Suppose I’ll close bus coupler what will happen or it will be share the load. Please suggestion and any modification required.

1 Answers  

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The neutral to earth connection in my industry is showing a zero reading (shorted). I have a machine which has to be installed where neutral to earth is not shorted and shows a leak voltage <3 Volts. Please suggest me how it is possible.

6 Answers  

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what will happen at the time of CT saturation?and what will be the Relay's function at the time of CT saturation?

2 Answers  

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