ISOLATOR
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CIRCUIT BREAKER
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Isolator is meant only for interrupting the power during maintenance or repair.
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Circuit breakers are meant for protection of a circuit or equipment from short circuit and overload faults while they are in operation.
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Isolators and Disconnectors are types of simple mechanical switch.
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Circuit Breaker consists of electromechanical switch and a relay in a single box.
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Atmospheric Air is used as arc quenching medium
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Different kind of medium are used typically atmospheric air, SF6 and Vacuum
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It is a Mechanical device which acts as a switch.
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It is an Electronic device made by using MOSFET or BJT.
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Isolators can be operated only during offload
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Circuit breakers can be operated during both on-load and offload.
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Pantograph ,Knee, Double Break, Center Break, Earthing etc.
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MCB (Miniature), ACB (Air Blast), OCB (Oil), SF6 etc
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Thermal Capability Low
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Thermal Capability High
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Cost is less
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Cost is high
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Cannot be operated on load
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Can be operated on load
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