Answer / ankurjha

Circuit Breaker:
Device to control current drawn by the load. Has the
facility of cutting the supply in case of heavy inrush of
current/ short circuit etc..

Contactors:
device to make/ break contacts as & when required. Have
control coil which is energized/de-energized as per the
control requirement.

Isolators:
Usually meant to isolate the circuit manually, so that the
circuit can be worked upon. Have fuses for potection of
load.

Answer / iamdon

circuit breaker can make,break and carry current under
normal,short circuit and overloaded condition..It operates
automatically.

contactor can make,break and carry current under normal and
overloded conditions only but not in short circuit
condition.It can operates more no of times without
maintenance.

Isolator can break currnt only through that part of circuit
which is bot carrying any current.It is manually operated..

Why Closing coli supervision is not required for Circuit breaker.

1 Answers   JSW,

---

what is the constructional difference between a power transformer and potentian transformer?

0 Answers   BTM,

---

i want to put single phase load on scott connected transformer,eventhough how to balance the transformer.

0 Answers  

---

What can you contribute to the progress of our Company as an employee if you are selected?

0 Answers  

---

what is the design voltage for 6.6KV 2000 KVAR HT capacitor?

1 Answers  

---

What is the maximum No. of out going mccbs permitted from an LV distribution paqnel? What is the ampere relation between incomer and out going switch gears/mccbs?

0 Answers  

---

what is slip what is the use of slip?

1 Answers  

---

how to select the cable size? any formula to calculate cable size?

4 Answers  

---

Batteries used for electrical energy storage are a. Laclanche cells b. Edison cells c. Lead acid cells d.any of the above

0 Answers  

---

Please give the formula for converting from 1 tr refrigeration to kw.

2 Answers   Bugema University,

---

how to carry out Magnetizing Current Test on Distribution transformer and what purpose we are doing this test.

1 Answers   CPCL,

---

what is meant by bus bar and outgoing/incoming breaker in an electrical/electronic circuit

3 Answers  

---