what is the working principle of dc motor & its application ?

3 Answers  

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why power not passes in plastic and rubber material

0 Answers   GPG,

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Why HT motors are connected in star.

7 Answers   GIL,

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what is the signification of trivector meter? why its name is trivector meter ?

3 Answers  

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ther is any difference if we use 240 V A.C,50 Hz,1 Ph. in place of 230 V A.C,50 Hz,1 Ph.

4 Answers  

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while doing high potential for 11KV 3 core cable how much leakage current will obtain?, what will be acceptance value?

0 Answers   Voltech,

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As we use capacitor bank in 3ph ckt to improve PF, can we use capacitor in single ph domestric use, in house we have Fan,Mixer,electric cooker,iron,tube choke they also lag the system,because it is inductive load. if it is possible to improve PF of single ph system-- if yes- type of capacitor to be used,connection diagram, working in detail. if no-- list it.

0 Answers  

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What are the main advantages of bode plot?

0 Answers  

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a 3 phase slip ring induction motor is wound for 4 poles on stator and 6 poles on rotor; when 3 phase balanced voltage source at 50 hz is applied to motor it will run at a)1500rpm b)1000rpm c)750 rpm d)zero rpm

13 Answers   Essar, PSPCL, PSTCL,

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What is the difference between surge arrestor and surge capacitor?

2 Answers   Shreem Electric Ltd,

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DEAR ALL I have motors ( 10 units )each one is 90kw 380V 50 HZ 1000rpm but new local pwer is 220v 60 hz requierd rpm should be 1000 pleas what the beast solution is used frequncy converter or rewinding all motos or chang all motors thanks

6 Answers   GE,

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Can any body tell me about partial discharge test, and why it is necessary and its procedure

1 Answers  

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