How to calculate the NGR value for a 2.7MVA Transfomer,
11KV system where the fault current has to be limited to
50A?
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
how are reversing the direction of rotation of dc motor
Difference between on line capacitor and Station type capacitor
What is the working mechanism of OLTC in Power Transformers????
sir i used 3 hp of motor for spraying pump, other home light and other home items which size of allminium pvc wire ix used
what are the applications of TIG welding
Logic using 1 kV or 1,1 kV grade in house wiring Low voltage cable. Explain/suggest? some use 1kV and some prefer 1.1kV grade insulation low voltage cable why??
what is the minimum pay scale for electrical engineer (building construction)in kuwait? plz revert back with yrs of experience & pay scale respectively.
How does cost of generation from hydropower plant compare with other sources of electricity?
how to extend relay operating timing in 24V dc relay card (without using Timer )
What is the disadventage of gland earthing(power cable) if any. ?
What is the angle of inclination for the oil connection from transformer conservator to Bucholz relay and why?
what happen if field of dc shunt motor opens? what is function of putting res. in parallel to one phase of 3 phase IM? the power supplied by 5A source in circuit is given by------Watt.
why we can stote dc? why we cant store ac?
71ohm,111ohm,95ohm,179ohm in calculate the total ohm in series circuit
what are the preventive maintanance actions taken for air circuit breaker? please answer me