Answer / hihi

open delta system or the v-v connection is used to minimise costs as it is a bank of 2 1-phase transformers can b used for the power supply purpose ..but its poweer output is 57% of the 3 ph transformer .. used wen less load cond so d losses r less ...and wen in fftute load requiremnt increases the 3rd windin is added

what is neutral grounding? why is it required? what is neutral grounding resistor and how is its value calculated??

11 Answers   NTPC, ONGC,

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what is the differance between ac induction motor and ac synchronous motor?

5 Answers  

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if we give connection of 100watts bulb through a single phase energy meter ,the disc of a meter rotates why it happens?

1 Answers  

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testing ZNYn11(d) vector group transformer

1 Answers  

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how test transfomer(3 phase75kva) by megger

0 Answers   HPL,

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what is lightning arester?generaly which type of used in industeries? why its used?

7 Answers   Essar,

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Before given the connection to Alternator (pre- commissioning) which tests we will conduct

1 Answers  

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Which factor decide the colour of the light emitted from a Led?

3 Answers  

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WHAT IS THE COOLANTS IN TRANSFORMER?

7 Answers   Bhel,

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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 IS SHORT CIRCUIT STRENGTH OF 100 AMPS MCCB?

0 Answers   ACC,

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What is cable gland,why does use for?

5 Answers   ABB,

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