Interested to Buy Any Domain ? << Click Here >> for more details...
We have 800KW motor operating at 6600Volt,50 Hz
supply.During 1st startup it tripped on overcurrent
trip.It's FLA is 88 Amps.The K factor of Thermal overloaaad
was set on .94 initially.then we set at 0.97 and then it
started fine.i dont understand why it tripped first?What
are the protections which comes in picture during starting ?
- 6 Answers
- 10000 Views
- I also Faced
- E-Mail Answers
Answer Posted / parveen garg
I DO NOT KNOW ABOUT 6.6KV MOTORS & ALSO ABOUT K FACTOR.BUT
ACCORDING TO UR QUESTION IT LOOKS THAT MOTOR DRAW MORE
INSTANTANOUS CURRENT THAN ASSUMED BY THE CALCULATION & AT
THIS STARTING CURRENT OLR TRIPPED,WHEN U INCREASE THE
SETTING OF OLR.IT DO NOT TRIP.
FOR THE PROTECTION POINT OF VIEW ONE EXTRA CONTACTOR MAY BE
PROVIDE IN PARALLEL TO THE OPERATING CONACTOR WITH TIMER
WHICH WILL MADE OFF THE CONATCTOR(PROVIDED NEWLY)&ALSO THIS
CONTANCTOR WILL DRAW POWER FROM MAIN BUSBAR WITH EXTRA OLR .
| Is This Answer Correct ? | 0 Yes | 5 No |
Post New Answer View All Answers
Which thing is maximum in RLC circuit at resonance a)power consumption b)inductive current c)capacitive voltage
What kind of Neutral CT can be placed in 11/0.433KV transformer to be used and what are its specification?
Why space heater is required for each verical bus bar chamber? if one space heater is adequate or not for anti condensation?
Draw a block diagramof Three UPS systems connected in Parallel mode?
why various test are performed on electrical panels & power cables before commissioning on site & what are these test???
WHY EXCITER PHASE SEQUENCE ARE OPPOSITE THAN STATOR SUPPLY PHASE SEQUENCE IN SYNCHRONOUS MOTOR >
Why the magneti fields are not passes from southpole to north pole
What is the general power consumption rating of CPU CRT type and Flat type, Monitor,Printer, projector, Scanner?
how indusrial diesel generator work
What is the kiosk parts, about them and their functions ? If anybody have some PDFs files or details about this plz send it on tawhidfaisal@Yahoo.com
What do you mean by an instrument transformer?
although ckt breakers have taken the place of old fuse. But instead of it , these older ones are still used in the industries and homes ? why .... what are their advantages and disadvantages ? which one is leading and winning the race and competition ?
132/6.6ππ πππππππππππ πππππππ πππ πππ πππππ πππ πππππππππ. πΈ'ππ πππππππ πππππππππππ ππ 6.6ππ/415π πππ πΈ πππππππ πππππππ ππ ππππ πππππ πππ ππ ππ 13/6.ππ πππππππππππ?? πΈπ π½π.. ππππ π ππ’??
How to do maintenance of transformer feeder.
Why neutral cable carry current.
