why anti pumping relay is not given to tripping coil of the breaker? why only to closing coil?

2 Answers   INEL, Siemens,

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Briefly describe three methods that are usually used by electricity suppliers to control voltage levels?

0 Answers  

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in three pin plug point, whats the reason that one plug point is bigger in size

4 Answers  

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Can VFD step up to 60 Hz if it is designed to receive 50 Hz input?

3 Answers  

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What should be the minimum and maximum ohmic value for earthing?

2 Answers  

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what is the use of tertiary winding?

2 Answers  

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In Air circuit breaker LSIG protection unit is used. Without fault in cables (2 runs 3Cx150Sq.mm Copper, 1Kv grade, XPLE armored cable IR value is more than 550Mohm @ 500V Megger) and load section Long time Overcurrent protection is triggers and trips the unit. We changed LSIG protection with new factory tested unit. Even then fault is persisting. Please suggest the possible causes

0 Answers  

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Why synchronous motor runs at a fixed speed? what is the name of that fixed speed?

4 Answers  

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how the earhing is done on ship and airplane.

2 Answers  

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How much current flow in no load condition of a motor?

8 Answers  

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V.c.b and a.c.b difference

4 Answers  

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what is the clearance time circuit breakr?

1 Answers  

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