2DU25L

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Circuit breakers are essential components of any electrical system. They are designed to protect the system from dangerous overcurrents that may be caused by damage, a power surge, or an unexpected electrical fault. 2DU25L circuit breakers are no exception, and offer excellent electrical protection in a variety of applications and environments. In this article, we will discuss the application field and working principle of the 2DU25L circuit breaker.

The 2DU25L is a 3-pole miniature circuit breaker (MCB) designed for residential and industrial applications. It is rated for a maximum operating voltage of 400VAC, 50/60Hz, and a maximum interrupting current of 25A. This breaker is designed for global use and has a variety of additional certifications, including UL489 and UTE C70-510. The circuit breaker also meets the requirements of IEC/EN 60898-1 for supplementary protection.

In residential applications, the 2DU25L can be used as a direct replacement for other 3-pole MCBs, such as the C45A, C65, and C85. The breaker is also a great choice for industrial applications, including motor protection, power distribution, lighting circuits, fire pump motors, and switched receptacles. With its UL489 listed rating, the 2DU25L is particularly suited for emergency circuits and critical loads.

The working principle of the 2DU25L is relatively straightforward. When an overload or short circuit in an electrical circuit occurs, the breaker’s thermal-magnetic tripping device trips, instantly interrupting the current in the circuit. The thermal-magnetic tripping device consists of a bi-metal strip, which begins to deform when the temperature in the circuit rises above a certain threshold, and a magnetized plunger, which is attracted to the tripping bar when the current in the circuit reaches a certain level. The interaction of these two components causes the tripping bar to pivot and trigger the internal mechanism of the breaker, which rapidly disconnects the circuit.

The 2DU25L circuit breaker also features a manual reset button, which can be activated once the cause of the overcurrent has been addressed and the circuit is safe to be reconnected. The reset button is also helpful in situations where a fault occurs and the breaker trips, but the cause of the fault is not immediately known. The reset button can be used to manually reset the breaker and investigate the fault, allowing for the safe repair of the circuit.

In conclusion, the 2DU25L circuit breaker is an excellent choice for residential and industrial applications. Its global ratings, UL489 listing, and IEC/EN 60898-1 certification make it suitable for a wide variety of applications, from emergency circuits and critical loads to motor protection and power distribution. The breaker’s thermal-magnetic tripping device and manual reset button provide reliable overcurrent protection and the ability to investigate faults safely.

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