Answer / k.prakashchandra

LBB relay is for failure of breaker to trip , and back up protection relay ( usually EM ) is for failure of main relay ( usually electronic )

explain LED lamps?

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List advantges of active filter over passive filter?

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WHAT TYPE OF DC MOTOR IS USING FOR ELECTRIC TRAIN ?HOW ITS FUNCTIONING ?

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can v rotate single phase induction motor in both the direction...?

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Can we step up a 230V supply to 400V using a single phase transformer??

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State nyquist stability criterion.

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diff b/w elcb and rccb

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can any one explain me the where is the use of plc and scada

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what happen "when Dyn11 is parallel operation with Dyn1"?

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Why sip ring used in ac motor also why its not used in dc motor?

2 Answers   RRB,

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In a d.c current, the power is the product of voltage and current. This relationship does not always apply to effective(r.m.s) values in an a.c circuit. Explain the reason for this.

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Why smallest capacity LV motor are star connected and medium & bigger size LV motors are delts connected

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