Answer / pavan

The value of the NGR to be inserted in the cicuit can be
calculated by the simple formula

R = V / (√3 * I)

Where V is the System Line voltage in Volts
I is the value of the fault current to be limited in your
case it is 50A.

In general practice the fault current is limited to the
full load rating of the largest equipment available in the
system.

why the name trunking bus PT

0 Answers   Siemens,

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what is differential relay in power transformer??

8 Answers  

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1,Building containing 25 flats how much Amp 3 pole MCCB are required? 2, For the safey of each flat how many Amp RCCB can install -loaded with A/C

1 Answers   L&T,

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Alternating voltage and current is which type of quantities?

1 Answers  

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why ELCB can't work if N input of ELCB do not connect to ground?

5 Answers  

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IF 3 NOS.OF HEATERS,3KW CAPACITY EACH,1 NO.HEATER CONNECTED IN R PHASE,1 IN Y PHASE AND 1 IN B PHASE.THEIR END POINTS CONNECTED IN STAR.IF I CONNECT THIS STAR POINT TO NEUTRAL OR DO NOT CONNECT TO NEUTRAL.WHAT WILL THE DIFFERENCE.

3 Answers  

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Dear sir, How to calculate 3.5 core pvc aluminium armoured cable meter wise carrying amps rating.Please give the solution with a good example.

0 Answers   Modi Builders,

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why we use low kv lightining arrester in line for example 9 kv using in 11kv

1 Answers  

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WHAT IS THE DIFFERENCE BETWEEN A DC MACHINE OUTPUT AND RECTIFIER OUTPUT...

3 Answers   Cesco, NTPC, RRB,

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what are the various parts of airconditioning system used in train and its working

1 Answers  

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what is the difference between relay, contactor

4 Answers   BRSS, Vishay Intertechnology,

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Has someone here done a sizing for a generator (3 phase), its for a pumping station. If you have an example for standby/duty and both running (I) star delta (ii) Soft Starter.

0 Answers  

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