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
What are the advantage of free wheeling diode in a full wave rectifier?
WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?
What is accuracy of a measurement?
What is line resistance of cable & how it can be measured ?
what is the significance of terminal voltage and phase sequence in the operation of paralleling of two generators?
Details about Flux Compensated magnetic Amplifer starter for motors
Determine the BTU size of an aircon for 20 sq metre room
Hi,iam a diploma in electrical engineering.rtd from indian air force in apr 2007.prsently working in reliance next link as a network maintenance engineer since 2007,can i get a job in motherson sumi.
Wt is the function of reactive power? How it generates & consume though resultant is zero?
What is boucholz relay and the significance of it in to the trformer?
Discuss the effect of sudden loading of an induction motor
what is basic difference betmeen normal & flame proof motor??
what is the difference between directional & non directional earth fault with example please explain.
fuel-air ratio in a petrol engine fitted with suction carburettor,operating with dirty air filter as compared to clean filter will be
when will be the iocl interview results ifaced the interview on september 8 th