3120-F311-P7T1-W02D-12A

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Circuit Breakers are a type of switching device that can be used to protect circuits against overload, short circuit, and ground fault conditions. The 3120-F311-P7T1-W02D-12A is a circuit breaker specifically designed for medium-voltage (~7.2kV) applications. This circuit breaker can offer fast and reliable protection against a wide range of faults to ensure the continuous and safe operation of facilities and equipment.

Construction and Operation

The 3120-F311-P7T1-W02D-12A circuit breaker has an oil-filled tank, an insulated arcing contact, an operating mechanism, and a moulded case. The tank is filled with insulating oil which is used to cool and quench arcs during the breaker operation. The insulated contact is designed to interrupt currents up to 12A and is connected to the operating mechanism. When the breaker is tripped, the operating mechanism opens a set of contacts, disconnecting the load from the power source and thus de-energizing the circuit.

The 3120-F311-P7T1-W02D-12A circuit breaker is typically operated by a trip coil, which is energized when the breaker is tripped. This allows the breaker to detect a fault current, disconnect the load, and remain open until the potential fault is cleared. Additionally, the trip coil can also be connected to an external source such as a relay or a switch for manual operation if necessary. The circuit breaker can also be arranged for automatic reset after a fault is cleared.

Application Field and Working Principle

The 3120-F311-P7T1-W02D-12A circuit breaker is used in medium-voltage applications and is particularly suited for facilities that require reliable protection against ground faults, short circuits, and overloads. It is also suitable for a variety of industrial and commercial applications, such as in power plants, distribution systems, industrial plants, and building services.

The working principle of the 3120-F311-P7T1-W02D-12A circuit breaker is based on an overcurrent protection system. This system consists of a trip coil and a set of contacts, which are connected to the power source. The trip coil is energized when the current in the circuit rises above a certain limit. When this occurs, the trip coil activates and opens the contacts, thus de-energizing the circuit and preventing damage to equipment or personnel.

The 3120-F311-P7T1-W02D-12A circuit breaker is specifically designed to offer reliable protection from a variety of faults such as overloads, short circuits, and ground faults. Its construction and operation are designed for superior safety and performance and it is capable of interrupting currents up to 12A. Its application field is mainly in medium-voltage applications and it is ideal for industrial and commercial applications.

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