What is the function of restraining coil in differential
relay? as well as restraining current?
Answer Posted / arvind manavazhagan
The concept is very simple. If we consider any relay there are two forces namely controlling and deflecting force.Both the forces are present during normal operation also. Controlling force keeps the contacts of a relay in normal position during normal operating conditions.When a fault occurs we know that due to a reduced impedance high fault current may flow through the circuit and hence through the secondary of the CT that is connected to the relay also.This in turn increases the deflecting force than the controlling force thus operating the relay.Controlling force is produced by the restraining coil and deflecting force is produced by restraining coil.
Is This Answer Correct ? | 6 Yes | 2 No |
Post New Answer View All Answers
Why LED light has advantage of rapid reflection ,although other lights alse reflect.? and this light is considered to be best for transmission usage in case of Free optics
How we can calculate the consumption in kwh of motor on basis of kw @100% load, @50% load & @ no load.
What are safety device in vcb and acb?
How can we calculate the KVA rating of a Distribution transformer from its core details?
What is the use for cable entry in control room?
what is a bus post insulator? explain its application in a substation.
Why is a plain induction motor unsuitable for wide speed control?
What is the difference between a verilog task and a verilog function?
1. How many types of mangers? 2.How many types of capacitors? 3.pls tell me normally types alternator problems?
is it possible to say motor horsepower number without seeing name plate(when name plate damaged)
what are the safety measures of induction motor?
how to electrically make connection to ferroli GN2N?
Define resonant frequency?
Is electro plating what type of load whether resistive, inductive or capacitive loads
How halogen & merquery lamp works.