Answer / thowsif_emerson

It consists of an iron armature fastened to a balance beam.
Under normal operating Conditions, the current through
the relay coil is such that the beam is held in the
horizontal position by the spring. When a fault occurs,
the current through the relay coil becomes greater
than the pick up value and the beam is attracted
to close the trip circuit. This causes the opening of
the circuit breaker to isolate the faulty circuit..

Log on to:-
http://electricalandelectronics.org/2008/10/30/electromagnet
ic-attraction-relays/

What is the breakdown voltage?

13 Answers  

---

what is the rating of boiler?

4 Answers  

---

what is the difference b/c choke and ballast?

1 Answers  

---

in an ac series circuit there are 30 bulbs are connected in a serial set.what will happen if one bulb is fused and we removed the bulb and reconnect with the remaining bulbs? (29 bulbs). will the brightness of other bulbs increase or not?

3 Answers  

---

Which motor will you choose which can operate in both lagging as well as leading power factors?

0 Answers   HPCL,

---

what is the meaning of neutral displacement ???

0 Answers  

---

What will happen to the speed of synchronous machine subjected beyond the pull out torque? Are the behavior shown by rotor remains same for both the alternator and motor?

1 Answers  

---

What is difference between Earthing, Ground and Neutral?

1 Answers   ABB, ABC, Indo Asian,

---

In the ACB breaker capacity is 2000Amp but this each phase taken 1250 But total beldibg load is 600amp or 700amp watt is the problem

0 Answers  

---

Differentiate between power relay and reverse power relay?

2 Answers   ABB, TVS,

---

how long will take to burst/damage for a CT when secondary in open condition? Experienced: During switchgear testing(Primary current injection test) some of the CT are in open condition, but nothing happen's why?

1 Answers  

---

CAN ANYBODY PLEASE TELL ME HOW TO DESIGN A SERIES REACTOR FOR LIMITING SHORT CIRCUIT FAULT CURRENT??

0 Answers  

---