T21-2-4.00A-06-11AL-V

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Circuit breakers are an essential component of any electrical system, providing both safety and reliability. The T21-2-4.00A-06-11AL-V circuit breaker is a type of thermal-magnetic breaker with an additional electronic component that increases its functionality and protection. Understanding the features of the T21-2-4.00A-06-11AL-V, its application field and working principle can help to ensure that it is correctly utilized and correctly maintained.

Application Field

The T21-2-4.00A-06-11AL-V is suitable for use in buildings, warehouses, roads and tunnels, marine applications, lift platform control boards and CNC systems. Additionally, it is certified to EN 60947-2, making it suitable for use in the majority of industrial automation applications including motor control circuits.

The T21-2-4.00A-06-11AL-V can protect circuits with a maximum voltage of 415V AC, a maximum current of 4A and an operating frequency of 50/60Hz. This type of breaker is also suitable for use in both DC and AC applications, however it should not be applied for short-circuit protection in AC circuits.

Working Principles

The T21-2-4.00A-06-11AL-V circuit breaker is a thermal-magnetic device with an additional electronic component. When the current exceeds the preset limit, due to either an overload or a short circuit, the electronic component immediately triggers a cascade of events closing the circuit breaker to protect the system.

The electronic component used in this circuit breaker is composed of a hall effect sensor, which will detect the current, and a power switch, which will deactivate the circuit breaker if the detected current is higher than the set limit. The power switch also disconnects the live wires so that no current can flow.

The magnetic component of the breaker enables fast operation to prevent a short circuit from damaging the system. The magnetic component is composed of a trip coil, which will be magnetized when the current exceeds the set limit, and a trip lever, which will snap into place when the coil is magnetized. This instantly cuts the power supply to the system. In the event of an overload, the thermal component will be triggered.

The thermal component is composed of a bi-metal strip which will change shape when the current levels exceed the preset limit. This movement triggers the trip lever, instantly cutting off the power supply. This type of circuit breaker also has an adjustable thermal trip unit to enable the user to operate a system within pre-set parameters.

Conclusion

The T21-2-4.00A-06-11AL-V circuit breaker is a robust and reliable protection device with a wide range of application fields and an effective working principle. By understanding the features of the T21-2-4.00A-06-11AL-V, its application field and working principle, it is possible to correctly install and correctly maintain the circuit breaker to ensure that it provides the functionality and protection it was designed to provide.

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