Why dc supply is used for closing and tripping coil of ht
breakers. What happen if we use only ups ac supply only.

Answer Posted / jpgupta

how to check capacitor

Is This Answer Correct ?    2 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is power in wattage of 8.5 TR AC

1275


In TNC switch, is there any 1NO+1NC block ? and if we move over closing position, is ther any affect on trip position or vice versa?

1875


Is there any guideline say about display of earthing value near to earth pit

820


how to find three phase complex power in per unit and MVA?

1745


what is meant by loss of field in a DC motor? how a universal motor works?

1496






hi can any body send me syllabus of rrb electrical section engg... and past pepar also of any board...

2257


working principle of AC Servo Motor with its construction

8505


what is the breaking capacity and making capacity of circuit breaker and how

1696


defination of transistor controlled series capacitor

2297


What is the suitable transmission voltage?

773


What is Surge Capacitor? Why it is use in Generator Circuit Breaker?

4689


Can anybody post questions asked in Engineers India Limited Interview? Thanks in advance.

1998


What are the operation carried out in thermal power station?

713


why ups rating in kva? and why ups are in parellel?.why isolation transformer is used in ups?

1565


what will happen if the prime mover on the field excitation of the on-coming generator fails?Explain.

5135