How to calculate the NGR value for a 2.7MVA Transfomer,
11KV system where the fault current has to be limited to
50A?
- 1 Answers
- 7514 Views
- Sterling Wilson, I also Faced
- E-Mail Answers
Answer Posted / 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.
| Is This Answer Correct ? | 6 Yes | 4 No |
Post New Answer View All Answers
what is the eight bit unit?
What is the previous name of Cox's Bazar
If Polarization index of motor 8.75 at 500volts of medium voltage 4.16 KV motor what this mean winding good or bad pl answer if any reffrence book give me the link
What is the most accurate way of testing ELCB?ELCB is better than RCD?
surge tank, hrc fuse, earthing transformer, firm power objective type
what is difference between cpp electrical system and refinery electrical system
what is the calculation formula for motor starting torque,running torque, running torque.
Draw the vector diagram and condition for the following: 1) Dyn1 2) Ynd0 3) YnYn0
why EMF IS INDUCED IN A CONDUCTOR WHEN FLUX LINKING WITH IT CHANGES ACCORDING TO FARADAYS LAW.
how to calculate the breaking capacity of different breakers.
if 3400kw slipring motor rotor shorting done and motor started on mv drive ,what will be the rotor shoring current
hi guys please tell me the procedure for mesuring the coil resistance of 3ph induction motor?
What are the conditions for sustained oscillator or what is backhouse criterion?
1.what is the funtion of chiller primary & scondary pumps. 2.what is the use of distribution lines & Types. 3.what is the use the thermal power stations & how much capacity.
how can we make cable shedule for controll wiring ? which details must be required for it.?
