What safety followup during kWh meter isolation

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why induction motors are rated at 0.8 power factor.

0 Answers   Bhel, TN,

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L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.

0 Answers  

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without any excitation we can strt any dc or ac moter?

6 Answers   Bhel,

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I need to connect a synchronous generator to the grid using automatic synchronization and two circuit breakers (one for synchronization, one for end connection to the grid), how to determinate the required diameter of the cables?

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what are the effects when the frequency is decreased in any ac machine

1 Answers  

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how is efficincy of the transformer is predermined

3 Answers  

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what is the pre charge circuit,what will be work which function it will be use plz tell me

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what is the impedence

1 Answers   Al-Othman,

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what are check points to be checked while charging switchyard?(CT,PT,BREAKER,POWER TRANSFORMER)

1 Answers  

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why near the transformers, the Jelly(small white colored rocks)are poured.and what are conditions for that?

3 Answers  

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what is the purpose of the armored for the power Or control cable? How to select the type of the armored?

1 Answers   Siemens,

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