How can we decide the fualt levels of sub-stations?
Answer Posted / akarsh mittal
fault level is given by
I(short circuit)= I(rated)/% impedance
Hence fault level is determined by percentage impedance of a line
| Is This Answer Correct ? | 13 Yes | 0 No |
Post New Answer View All Answers
Can anyone please provide me details of MCCB/Contactor/SFU rating calculations for a motor feeder..for example 50 kw.. not from type-2 cordination chart. i want manual calculations..
Explain Active power,reactive power,how its related to each other , & inductive ,capacitive.
Name the test signals used in control system
I want to do a mini project. Now I'm studying in 6th semis tor EEE Engineering.
Hello Friends, How can we recognize the CT Star Point is S1 or S2 in case of Electro Mechanical Relays and what is meant by Restraining coil in relays and what is the purpose of that.. thank you in advance..
If a 3 phase induction motor is in off condition in the conveyor and rotor of the motor keeps moving with the conveyor than the resistance of windings of motor varies. why is it so ??
The electrical energy required to raise the tempreture of a given amount water is 200 kwh. If the heat losses are 20%, the energy required is?
What consists of 2 or more thermocouples to be connented series?
Pl. brief about break-down maintenance of machine tool.
Why sometime AVR and sometime Booster coil is used in Alternator? what is the diferance between AVR & Booster coil due to which they are selected
234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,
what do u understand from filter factor of reactor?
I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. Between alternator & breaker one stepup transformer used. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.
why constant voltage transformer should be start without load? and if started then what will happen?
Why AC current leads voltage in capacitor and how?