what kind of motors are used in the winders of coal field?and what are the various methods of it's speed control?

1 Answers   Monnet,

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What is DPR relay, And what for??

2 Answers   Engro,

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what are the types of basic earthing?and why we are doing that?

3 Answers   Bharti,

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SUPPOSE A CIRCUIT BREAKER HAS TRIPPED THE THE LINE WHEN A FAULT OCCUR ON IT.NOW WHEN THE FAULT HAS BEEN CLEARED, HOW THE CIRCUIT BREAKER WILL CLOSE AUTOMATICALLY NOT MANUALLY.

6 Answers   Bureau of Energy Efficiency, DVC,

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In an ACB shunt trip coil and undervoltage coil operated normally( breaker open and charged). But closing coil not operating untill manually discharge and recharging. Any help.

0 Answers   PPIL,

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why in india the voltage generate multiply by 11,,,like 220v,440v,11kv,33kv,66kv,220kv,

3 Answers   NTPC, Servotech, Tata Power,

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What is meant by coupling capacitor?

0 Answers  

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What is the working principle of VFD

3 Answers   HCL,

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What is the purpose of earthing Truck ? How does it work for busbar and cables?

1 Answers  

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role of shunt coil in circuit breakers

2 Answers  

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In HT overhead line why should provide top conducter which is not connected whith insulater..?

3 Answers   Essar,

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What is the working of SCM CT or purpose in genrator ?

3 Answers   Bhel,

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