what is the response time of relays when a FAULT OCCURS IN A
POWER SYSTEM?
- 2 Answers
- 4161 Views
- I also Faced
- E-Mail Answers
Answer Posted / k.prakashchandra
As per discriminative time settings
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
I want to replace the 3 KW DC motor with AC motor so what should be the rating of AC motor? Details Of DC motor to be changed with AC are - Kw - 3, Vf - 310, If - 0.15, Va - 400, Ia - 13, RPM - 2400
what do you mean by class PS CT and what are technical details needed for calculating it?
ii) A shunt motor supplied at 230V, runs at 900 rpm when the current is 30A. The resistance of the armature is 0.4 ohms. Calculate the resistance required in series with the armature to reduce the speed to 600 rpm, assuming that the armature current is then 20A. [12]
IF HT CAPACITOR IN ON POSITION IS THERE ANY LOSSES I.S I SQURE OCCURS IN THE SYSTEM
What is difference between insulating medium and fault current interruption medium in a switching device.
at work i have a genertor/alternater what is the easyest way to work out if it is dc or ac?
gas turbine genrator reactances
For a three phase induction motor, what will be the effect on motor if the neutral of the system is shifted to say 20 deg.?
what is the formula for calculating the phase clerance between two phases and phase to earth how to calculate the cable for a motor
What is dielectric loss?
what are the standard IR values should be of R-E, Y-E, B-E, R-Y, Y-B, B-R of VCB in closed condition and in open condition for 500KVA & 1000KVA transformers. and what is the acceptable range when tested by 5000V megger.
Does all the output contacts (N/O as well as N/C) of a Numerical relay operate when relay receives a binary input/inputs or contacts are designated to specific logic input/inputs and only these contacts operate?
What are the types of windings according to the construction?
Why are cables rated for 40 KA for 0.25 Sec fault current rating?
at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.
