Which circuit breaker arc quenching time is low AC or DC breaker?
Answer / g.esakkimuthuraman
AC because AC arc current come to zero but DC arc current does not come to zero so it will take some time compared with AC.
| Is This Answer Correct ? | 14 Yes | 0 No |
WHAT IS THE MEANING OF BALANCED / UNBALANCED IN STABILIZER TYPES.
What is Reactance & Impedance? what is diffrence between these?
Please help me regarding my one concern. - During earth pit testing we noticed that the Clean earth pit and dirty earth pit showing continuity (Resistance value - 5ohm) . I want to know that if both earth pit have separate location and there is not internal looping between PIT then why such continuity is showing on it . Because of this issue the field side all earthing point showing short. In PLC panel we are providing two types of earthing cable which is coming from separate earth pit (Clean and Dirty earth pit) because of earth PIT showing short our PLC is not complying spec . please help regarding this issues.
WHAT IS MEANT BY SLIP , WHERE IT OCCUR
Do any one know exacatly when the results for NHPC held on 8th march 09 for engineering trainees will be released ?. if so please post it, i'm eager to know it.
what is load balancing. what maximum load diffence is allowed between phases.
In Ferranti effect,Receiving end voltage is greater than sending voltage,why? can anybody tell me the answer
15 Answers Engineers India Limited,
On what basis no of earth pits are to be decided either for transformers or for equipment?
Why don't connect earth wire to elcb?if earth fault occur,how will detect it
1 Answers TATA, Tata Communications, Telecommunications,
on 22.03.2015 at 17:15hrs Y phase 66kV class Power Trf-2 Current transformer has flashed over and oil came out. The failed CT has been replaced on 24.03.2015 at 13:15hrs and the Trf has been charged in presence of RT Hassan after conducting the pre-commissioning tests. On the same day at 17:00hrs the commissioned CT has again flashed over and immediately the Trf has been isolated from power supply. It is confirmed the secondary is not opened and checked the earth integrity and is found ok. Here what would be the reason for the CT failure?
why we measure ouput of transformers in kva.
Buchholz relay is used ………. a) protection T/F b) oil T/F c) Air core T/F
8 Answers Engineers India Limited,
Civil Engineering (5086)
Mechanical Engineering (4456)
Electrical Engineering (16639)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)