Answer / mahavir jagdev

Read the book THEORY & DESIGN OF ELECTRICAL MACHINES by M.G. SAY .... all your querries will be cleared.

And if you can solve all the numericals of the book G.PARKER SMITH .... there be no unanswered question on electrical engineering left in your mind

when a motor is connected in parallel with the existing motor the pf will change or not?

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Just a silly question but just to make my curious mind bac to normal - Why was not 67 and 67N relays built into a single relay as i have noticed that the R,Y,B CT wiring end up into the 67 relay while the common of the R,Y,B CT wiring end up into the 67N relay. Then it was better if a single relay was manufactured just like the distance relay (21). Another question i would like to ask is - how do we know where the 67 and 67 N relay has to be placed.why is it not placed at the transformer bay? In the substaion that i am working -i have noticed that it is placed between a breaker and a common double bus bar and this line bay is connected to another substation at a remote place which is furthur connected to a load. B U S______CT for 67 & 67N ______Breaker _____ remot s/s. B A R

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What happen if we re-start H.T motor whose rotor is running at 40% rated speed. Is it will damage motor winding?

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How to measure power in 2 or 4 or n phase circuit? Please give me a formula.

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what is RCBO?

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how fluoresent lamp works??

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how can we connect the capacitor bank to improve the power factor?

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What is the significance of %Z in case of transformer?

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what is efficient load of transformer in percentage

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formula for calculation of switchgears(i.e. contactor, fuse, cb, relay etc.), if load current is given?

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What are the different modes of plc processor?

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wat is the importance of reactive power in power generation.....if it is zero means wat will happen to system........

22 Answers   Bhel, Jindal,

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