279-2-1-51F-9-9M-40-AH

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Circuit breakers are designed to protect an electrical circuit from overload and short circuit. They are used in a variety of applications, including residential, industrial, automotive, and commercial applications. The 279-2-1-51F-9-9M-40-AH is a type of circuit breaker that is designed for specific applications and has a working principle that is different from other types of circuit breakers.

The 279-2-1-51F-9-9M-40-AH is a molded case circuit breaker (MCCB) designed for use in residential and industrial applications. The device is designed with an over-load protection feature that will protect the circuit from too much current. This is done by monitoring the current that is flowing through the circuit and if it exceeds a certain level, the breaker will trip and cut off the power to the circuit. The over-load protection feature is also designed to protect from short-circuits by limiting the current that is flowing through the circuit and shut off the power if the current exceeds a certain level.

The 279-2-1-51F-9-9M-40-AH also has an anti-islanding feature. This feature helps to protect the circuit from power islands that could be created due to the breakers being switched off and on or the circuits being opened and closed. If an island is detected and the system is in an unsafe state, the breaker will trip and cut off the power. This feature is particularly important in applications where the risk of an island exists, such as in an industrial or commercial environment.

The 279-2-1-51F-9-9M-40-AH also has an arc-fault protection feature. This feature helps to protect the circuit from arcing faults, which can occur in the event of a short circuit. The arc-fault protection feature will automatically detect the presence of an arcing fault and shut off the power to the circuit in order to prevent damage to the circuit and the equipment that is connected to it.

In summary, the 279-2-1-51F-9-9M-40-AH is a type of molded case circuit breaker designed for residential and industrial applications and has a variety of important safety features, including over-load protection, anti-islanding, and arc-fault protection. These features help to ensure the safety of the circuits that the breaker is connected to and the equipment that is connected to it, helping to prevent damage from overloads, short-circuits, and arcing faults.

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