Hence, it can be operated under power on conditions. it can only be operated when there is no current flowing through the circuit.Ĭircuit breaker is an on-load device. The following table highlights the major differences between isolator and circuit breaker- Basis of DifferenceĪn isolator is a type of disconnecting switch which is used in an electrical circuit to ensure that the circuit is totally isolated from the supply mains.Ī circuit breaker is a protective electrical device that works as a switch and is used to stop the flow of electric current through the circuit wherever necessary.Īn isolator is a simple mechanical switch.Ī circuit breaker consists of an electromechanical switch and a relay system in a single unit.Ĭircuit breaker can be operated manually as well as automatically. Difference between Isolator and Circuit Breaker Most important thing about an isolator is that while anyone using an isolator, the current flowing through it must be zero or within the limits of safety. The isolator is a separate part of the electrical system which is created for safe maintenance of the faulty section. An isolator blocks the DC components and allows the AC components to flow though it just like a capacitor. The isolator is used when maintenance and repair are to be done in an electrical system to protect the technicians and other equipment. it can only be operated when there is no current flowing through the circuit. Basically, the isolator is a disconnecting switch that can be operated under off-load conditions only, i.e. Sometimes, an isolator is also called as a disconnector. What is an Isolator?Īn isolator is a switchgear component which is used to disconnect or isolate the whole or a specific part of the circuit. and is suitable for handling heavy load currents. A circuit breaker is attached to the electrical devices such as transformers, etc. The circuit breaker also has an in-built extinguishing system which enables it to operate under on-load conditions. The circuit breaker detects such faults with help of a relay system and interrupts the current flow through the circuit, preventing further damagesĪ typical circuit breaker can be operated manually and automatically. The primary function of a circuit breaker is to protect the circuit from overload and short-circuit faults. The circuit breaker is arranged in series in an electric circuit so that it can stop the flow of current through the circuit whenever required. What is a Circuit Breaker?Ī circuit breaker is an electrical safety device which works like a switch. Also, it will explain what the circuit breaker and isolator are, so that the reader can easily understand the differences between the two components. This article is meant for explaining the differences between circuit breaker and isolator. Therefore, they are closely related to each other, however, there are many differences between circuit breaker and isolator that draw a line between these two. The isolator and circuit breaker both have a similar function of disconnecting the electrical circuits when there is an issue in electrical system. These two devices are very important in an electrical power system. Amongst these switchgears, the circuit breakers and isolators are commonly used in every electrical power system. The most important set of these devices that helps to ensure this safety is switchgears. In electrical power system, various devices are used to ensure the safe operation of electrical equipment.
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