A device for repeatedly establishing and interrupting an electric power circuit under normal conditions .A contactor is a special type of relay used for switching an electrical circuit on or off. They are most commonly used with electric motors and lighting applications.

A device for repeatedly establishing and interrupting an electric power circuit under normal conditions .A contactor is a special type of relay used for switching an electrical circuit on or off. They are most commonly used with electric motors and lighting applications.

An electrically controlled switch called a power contactor is used to switch a power circuit. A circuit that is often considerably weaker than the switched circuit, such as a 24 volt coil electromagnet controlling a 240 volt motor switch, controls the contactor.

An overload relay, also referred to as a relay switch, is a device that opens the circuit in the event of an electrical, thermal or power overload. When mounted with a contactor they create a motor starter. Overload relays are normally closed, meaning they only open if they experience an overload.

A device for repeatedly establishing and interrupting an electric power circuit under normal conditions .A contactor is a special type of relay used for switching an electrical circuit on or off. They are most commonly used with electric motors and lighting applications.

The MCB is largely used in low circuit current, while MCCB is used for the heavy current circuit. The MCB is used for low energy requirements (domestic purposes), whereas the MCCB is used in high energy requirement regions (large industries).

In an electric power system, switchgear is composed of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Switchgear is used both to de-energize equipment to allow work to be done and to clear faults downstream.

Switchgear is a broad term that describes a wide variety of switching devices that all fulfill a common need: controlling, protecting, and isolating power systems. This definition can be extended to include devices to regulate and meter a power system, circuit breakers, and similar technology.

Switchgear is used both to de-energize equipment to allow work to be done and to clear faults downstream. This type of equipment is directly linked to the reliability of the electricity supply.

MCB basically means miniature circuit breaker as it is used for up to 100amps in the motor feeders. MCCB (full form: moulded case circuit breaker) is used for 250 amps to 800 amps in the motor feeders. This system of circuit breaker basically protects the entire electrical system from overloading and having such conditions of short circuit issues. To simply put it these are the electrical protection gadgets that are used mostly with a wide range of voltages as MCCB which are commonly known have adjustable trip settings and can hold as much as 2500 amps in current ratings.

The Residual Current Circuit breaker RCCBs are the safest device to detect and trip against electrical leakage currents, thus ensuring protection against electric shock caused by indirect contacts.

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