Answer / einstine michel farade

In simple word isolater means isolating and breaker means
breaking

Answer / sandeep srivstava

Major difference between isolator and circuit breaker is that isolator is an off-load device, whereas circuit breaker is an on-load device.

(An isolator switch is part of an electrical circuit and is most often found in industrial applications. The switch does exactly what its name suggests in that it electrically isolates the circuit or circuits that are connected to it. Such a switch is not used normally as an instrument to turn on/off the circuit in the way that a light switch does. Either the switch isolates circuits that are continually powered or is a key element which enables an electrical engineer to safely work on the protected circuit.

Isolator switches may be fitted with the ability for the switch to padlock such that inadvertent operation is not possible. In some designs the isolator switch has the additional ability to earth the isolated circuit thereby providing additional safety. Such an arrangement would apply to circuits which inter-connect power distribution systems where both end of the circuit need to be isolated.

An isolator is a switch connected after a circuit breaker. When a circuit or a busbar is taken out of service by tripping the circuit breaker, the isolator is then open circuited and the isolated line is earthed through earth switch so that the trapped line charges are safely conducted to ground.

A circuit breaker is a complex circuit -breaking device with the following duties:

Make or break both normal and abnormal currents,
Appropriately manage the high-energy arc associated with current interruption. The problem has become more acute due to interconnection of power stations resulting in very high fault levels,
Effect current interruption only when it is called upon to do so by the relay circuits. In fact they are required to trip for a minimum of the internal fault current and remain inoperative for a maximum of through fault current,
Rapid and successive automatic breaking and making to aid stable system operation,
3-pole and single pole auto-relosing arrangement.

Answer / ayush rastogi

Circuit Breaker is a device which can
Make or break circuit under normal conditions either manually or through remote control.
Break circuit automatically under faulty conditions.
Make or break circuit under faulty conditions either manually or through remote control.
Some types of circuit breakers are Air blast circuit breakers,Vaccum Circuit Breakers ,SF6 Circuit Breakers,etc.You can notice the circuit breakers near to the transformers.Next time when you see a transformer search for the circuit breaker.Mostly it will be SF6 Circuit Breakers.

Isolator or Isolating Switch is a device which is used to disconnect a part of the system for maintanance purpose and repairs.Isolator can open a circuit under no load condition only.If two isolators are connected on either sides of circuit breaker,then the circuit breaker must be opened before opening the isolators.
After perfoming maitanancee work on the circuit breaker,isolators must be closed first and then the circuit breaker must be closed to bring the system into operation.

Answer / dimple suman

inspite of isolator is an off load nd circuit breaker is on load device ,the another major difference is that isolator lakes 7 minutes for starting while circuit breaker takes 1mili second that is why we prefer circuit breaker more than isolator

Answer / ammaji rao duppada

Circuit breaker can operate on both on load and off load but
Isolator is operated on off load only and the circuit
breaker is always flanked by two isolators.

Answer / rupeshwar priy

i think that isoletor is off load device and circuit
breaker is on load device.we can operate isoletor manually
only but circuit breaker is automatically operate when it
is desire.
first of all circuit breaker is disconnect the circuit and
isoter is isolate the circuit after we manually maintain
the power system where fault is present.

Answer / murthy

any fault condition circuit breaker can be automatically
oparated in load position.

Isolator not like that it is manually oparated.

Answer / sameera

Isolator are off load device it is not use for making &
breaking current. Therefore it not has making & breaking
current for the capacitors.

Eventhough the isolator is used to operate with zero
current these are instantaneous in which this are used
under load condition. Then the isolator act as on load
device.

Circuit breaker is switching 7 current interrupting device
& operate under normal & abnormal condition.

Answer / kundan malani

isolator operate only no load condition means c.b
maintenance so that work to the isolator

Answer / jagadisha.n bmsit

Isolator is also remote operated with the solenoid,
and it can be operated on load condition depend on
requirement it is used to isolate downstream circuits from
upstream circuits.it is operated depending on its
specification.but it will not detect any faults and trip the ckt

circuit breaker is onload automatic device used for
breaking the circuit incase of abnormal conditions like
shortcircuit, overload etc., it is having three
specification 1 is rated current and 2 is short circuit
breaking capacity and 3 is instantaneous tripping current.

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