Answer / k.prakashchandra

The plunger will not act with AC supply

Answer / linish

Trip circuit should be powered from a class 1
supply since it is responsible for
total protection of the system,so most reliable
source will be battery that is DC

Answer / vvvv

a trip coil is expected to work with high speed reliably so
as to produce effective jurk.
AC supply can also be used for trip coil subject to proper
design. however after comparison for same rating coils, it
will be clear that DC Trip coils exhibit the required
performance as compared to AC

Answer / thanigai1984

We cant store the AC supply... we store only DC supply ...when abnormal condition AC supply will Trip on that time we used as DC supply .. that why they use DC coils for Trip and Close..

Answer / vijay balu raskar

Main reason is property of Inductance.

oil cooled transformer

0 Answers   Jindal,

What iz main protection of mediuum voltage motors and what iz the standard IR voltage of 6.6 and 11kv motors.

1 Answers   GE,

What is effect of low pf on HT supply.

6 Answers  

1]how the voltages and frequency are achieved on ships. 2]how does the line and phase voltages are related on ships.

3 Answers  

purpose of breaker contact multiplication relay?

5 Answers   ABB,

Relation between pyramids and electrical technology?

1 Answers  

we have two motors 1250kW,6.6kV to be coupled on the same shaft ,so please provide assistance for their synchronisation.

0 Answers  

how power can be saved using VFDs in detail explain

1 Answers  

What is difference between isolator and circuit breaker?

0 Answers  

What is the current carrying capacity of 35sq.mm flexible cable?

0 Answers  

Suppose an electric motor with a controller is not working. What is the sequence of testing you will do in your troubleshooting?

2 Answers   Emerson,

What is the safety of UPS?

0 Answers