Power off reset thermal protector

Abstract

The invention discloses an outage reset thermal protector, aims to provide an outage reset thermal protector provided with test and having high safety performance, and solves the problem of inconvenience in fault acquisition due to no test device of the protector. The technical scheme has keys that a positive temperature coefficient (PTC) device is arranged on a shell, connected in parallel onto a movable contact and a static contact and fixed by a steel clip, a heating filament is arranged on the upper surface of a bottom plate, a test port is reserved, and an intelligent coating layer is arranged on the shell and is one or more of a photochromic coating layer, an electrochromic coating layer and a thermochromic coating layer. By the outage reset thermal protector, the effects of improving the safety performance of application, facilitating a test in advance before usage and improving the reliability are achieved.

Description

Technical field [0001] The invention relates to electrical components, and more specifically, it relates to a power-off reset thermal protector. Background technique [0002] Thermal protectors are widely used in various industrial automation equipment, aerospace and various weaponry and other fields. If the motor is overloaded or blocked during operation, the current of the motor coil will increase, causing the coil to heat up. If the fault is not eliminated, the insulation layer of the coil may be damaged, resulting in damage to the entire motor. Burning down, or even fire, will damage the entire equipment and cause serious safety accidents. Another example is the need to closely monitor the temperature of the engine or warhead on weapons and equipment to prevent serious accidents such as engine damage or warhead explosion caused by abnormally high temperatures. Therefore, these devices are generally equipped with temperature protectors to monitor the heating of the equipment...

AI Technical Summary

Problems solved by technology

[0005] However, the above structure does not have a test device for the protector. If the bimetal of the protector fails due to performance loss or other failures, and the user cannot effectively judge this in advance, it will easily lead to safety accidents, and It is possible to cause equipment damage due to the use of a faulty protector, which greatly increases the maintenance cost of the equipment. It can be seen from the above that research in this direction on the basis of existing technologies has great application prospects

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