Why VCB and SF6 breakers to be used in HT used by cant ACB
of higher rating to be used for 11kv and 33kv.
Answer Posted / grao
In high voltage we use SF6 or VCB.Because if we go to ACB
the arc quenching will no be proper.Where as if we use vacuum
or sulfur hydrochloride the arc quenching can be 100percent.
Is This Answer Correct ? | 6 Yes | 12 No |
Post New Answer View All Answers
What are the types of control system?
Is single load(eg: three phase motor) having all the components like positive,negative,zero sequence components during fault condition?
Can we transmit digital signal to long distance ?
State kirchoff voltage law?
1. what is usage for power factor in industries?? 2.why we need to monitor power factor??
what is the difference between earthing and unearth
What is the automatic voltage regulator with servomotor?
how we calculate the withstansing current capacity of wires&cables?
Differentiate between low pass, high pass and band pass filter?
hi frenz,its aswathy.i hve aplied for the hpcl test on feb,pls send the test patern & the placement papers as soon as possible. mail-id :kjaswathy@gmail.com
Thermal withstand capability under full short circuit conditions, in terms of number of times of occurrence of short circuit and corresponding anticipated percentage reduction in transformer life.
If only R Phase is connected in 2 pole elcb, n is not connected than it will work or not in ground fault.
What is meant by Low Resistance Cable and High Resistance Cable.
Where is servomechanism used?
Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............