Isolator vs Circuit Breaker [Top 10 Differences]

The Isolator is an electrical device which is used for disconnect a circuit under no load condition whereas a circuit breaker is an electrical device which opens circuits under fault conditions. A circuit breaker is different from isolator because it can operate under no load, full load or faulty conditions. In this post you’ll learn top 10 difference between Isolator and circuit breakers:

IsolatorCircuit breaker
Is used to isolate some portion of circuit from entire systemIs basically a fault interruption device
Is an off load deviceAlso an offload device
Is not an onload deviceIs onload device
Manual operationCan be operate manually as well as automatically
Should be operated after opening circuit breakerShould be opened first and then isolator be operated
Inexpensive as compare to breakerExpensive as compared to the isolator
Only Quenching material is airQuenching material can be air, Sf6 gas, oil (in old breakers) or vacuum
Protection relays are not requiredProtection relays are required for operation
Its entire construction is visibleIts internal construction is not visible and is enclosed
No special arc suppression methods are used Various arc suppression techniques and methods are used

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