Answer / purushmallya

As per ES&D and Grid code for distribution transformer 3
earthings are mandatory one for neutral one for LA and one
for matallic parts like GOS

Answer / prashant

2NOS OF BODY EARTHINGS AND 1 NO OF NEUTRAL EARTHING

FURTHER MORE THE BODY EARTHS CAN BE INTERLINKED WHILE THE
NEUTARL HAS TO BE SEPARATE

why we use RYB phase sequence? and somewhere we use UVW ? why?

6 Answers   CSPDCL-Chhattisgarh State Power Distribution Company Limited, MUET, TCS,

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how to discharge 3 phase power factor correction capacitors

0 Answers   M S Ramaiah Institute,

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how to calulate bearing number of any motor ?

0 Answers   Transfield,

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what is the function of open delta System?

1 Answers  

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how to select overload-relay for perticular motor 1.for D.O.L. starter 2. for Star-delta starter ????

0 Answers   Vatika,

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why we are caling 440 volt 3 phase supply instead of 660 volt 3 phase supply? because each phase as a voltage of 220 volt. if anybody know the answer for my question please send it to my mail id. thank you.

3 Answers   College School Exams Tests, Jindal Steel and Power, JIOL, NEC,

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Explain the term parallel path in dc machin ?

0 Answers   UPSC,

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Why transformer neutral earthing? What is advantages?

6 Answers  

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What is Harmonic affects in power system. what is unit of harmonics and how to measure it. how much value should be in power system.

1 Answers  

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In a Dyn11 transformer, how are the 3 windings of the delta connected? Assume that R1-R2, Y1-Y2, B1-B2 are the 3 windings on the HV side.

3 Answers  

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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

1 Answers  

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how are reversing the direction of dc motor

0 Answers  

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