IDMT Over Current Relay Grading Calculation (50/51)
November 5, 2012 10 Comments
IDMT Over Current Relay Grading Calculation (50/51):
- Calculate IDMT Over current Relay Grading up to 5 Nos of Radial Bus bar System.
- Calculate Relay Pick up setting of IDMT Over current Relay from Downstream to Source End.
- Calculate PSM of Various IDMT Relay from Downstream to Source End.
- Calculate Time setting of Various IDMT Relay from Downstream to Source End.
- Calculate Total Grading Time of Various IDMT Relay from Downstream to Source End.
- Calculate Actual Relay Operating time according to Various IES Curve.
JIGNESH PARMAR
sir,
you r doing such a great job for upcoming electrical engineers hats off to that and…my question is i need test connection diagram of ”tan delta test” for transformer’s winding, bushing,cable and motor. I would be greatful if u send these details..
I’m fresh engineer in electrical field. Now i’m working in EHV sub-station as trainee engineer. Will u explain the how to calculation formula for all those parameters.
Refer Task bar of Sheet..All Formulas of each Cell are visible in Task bar…
Dear Sir,
Can we use the IDMT Over Current Relay Grading Calculation for Ring main System also,
Pls let us know, I’m ready to buy this right now
The Calculation is for Radial system only..Not ring main..
Dear Sir,
Great job. How to calculate minimum fault current needed for relay co ordination.
Dear sir,
I want to know about that loop impendence test for communication tower station.Pls explain as well as any imformation.
Sir, i want to know that the IDMT Curves i.e normal inverse 3.0,Normal inverse 1.3 sec,Very inverse etc are standard for all electromagnetic,static and numerical relays.
i need help in protection setting of double busbar overcurrent protection setting.
I am a fresh BE(electrical) engineer, working in a 3MW thermal power plant project. I need help about the most important points which need to keep in mind at the time of erection and commissioning.