Answer / harit

Overcurrent setting should be 120% of the Full Load Current of motor (time setting should be as per the recommendation of the manufacturer or Load characteristic)

instantaneous overcurrent & short circuit current settings should be 7 to 8 times of the full load current. Time interval to trip : should be set at zero (instantaneous).

Two liquids hot and cold in two vessels are there and an metal bar acts as a conductor of heat between the two vessels. what happens then. what happens after 24 hrs?

0 Answers  

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why any inductive load need free wheeling diode?

4 Answers   Essar,

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What is mean by power factor?

18 Answers   Shreem Electric Ltd,

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why transmission lines traveled in high voltage?

5 Answers   TATA,

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when is the Ohms law is applicable?

11 Answers   ABB,

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If any HVDC line is going with positive & negative(the negative usually have return path of current with earthing electrode). Now the question is if this HVDC earthed electrode which is using as return path and earthed any nearby 400kv or 220kv AC substation equipments. which will be the impact of this on AC substation & its equipment, how severe may be this and what should be the minimum distance require between HVDC earthed electrode and AC substation equipments? It's really an high engineering level question...Dare to answer and increase your knowledge.

0 Answers   MEIL,

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I am having a 42KW 3 phase electrical heating furnace, heating element is 80/20 nichrome material, my connections is made in such a way that 2 star connection compromising 2 coils per phase so totally 12 coils, shall if i use it unbalanced star condition (instead of 2 group of 3 phase or 1 group of 3 phase, connecting 4 phases of 5 phases) what will be the consequences and is it acceptable?

0 Answers  

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Why in power plant projects we see DOL starting method used for motors upto 160 kW instead of star delta method

0 Answers   UCC,

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what is MAR

1 Answers   NCC,

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how to reverse the direction of universal motor?

2 Answers   Finolex, JGT, TATA,

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why we use four type of phase angle difference between pimary & secondry winding of a transformer & where we use them?

0 Answers   Grasim,

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why r we using vaccuum circuit breakers in the place of m.o.c.b.

1 Answers  

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