how a single machine can act as both motor and generator? and give explanation interms of connections?

1 Answers  

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what will happen if any motor runs long time with star connection in400vA.C. system

5 Answers  

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how to increase senstivity of ct

0 Answers   NPCIL,

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what is the preventing maintenance of transformer

1 Answers  

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is all the servo motors having brake?please specify which servo motors having brake for stop on position and which are not.

0 Answers  

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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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what will happen if dc supply is given to ac motor?

9 Answers   CTS,

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how to find out speed of single phase motor

6 Answers   BARC,

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how to decrese the PH value of liquid resistance?

2 Answers   ONGC,

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what are the pecularity of shaver sockets ?

0 Answers  

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what is earth-fault?when it occurs? to check where it occurs what type of test should we do?

0 Answers   ONGC,

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how can a transformer test by megger?

1 Answers  

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