What is the previous name of Cox's Bazar

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line vltage of three phase distribution transformer is 433v and phase voltage is 250v,but we required 230v for domestic distribution,then how we reduce phase voltage of transformer

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why current flow throgh conductor.

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What is the HVDC Transmission System? What are the conditions applicable to lay an HVDC Line?

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What are the three constants associated with a steady state error?

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1-What is the difference between absorption factor and polarization factor in insulation resistance test in transformers? and why we inject until ten minutes to get polarization factor?

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List advantges of active filter over passive filter?

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1.Why hydrogen used for cooling in generators 2.Why electrical equipment protected by ground 3.Why earthing for transmission line 4.What is rms value of half wave rectified square wave. If Rms value of actual wave 2amps.

1 Answers   Power Grid,

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how many types of grounding?

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Explain difference between stand by earth fault and residual earth fault protection?

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what is the name of the oil is used in transformer?

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why power factor is lagging and leading(i.e -1to +1)

2 Answers  

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