Tripping device for electronic type earth leakage circuit breaker

Abstract

A tripping device for an electronic type earth leakage circuit breaker comprises a housing, a coil framework arranged in the housing, a movable iron core and a mandril which are arranged inside the coil framework and an electric leakage tripping drive coil wound at one end of the coil framework as well as one surge protection coil, the mandril is connected with the movable iron core, the electricleakage tripping drive coil is located at one end, where the mandril is arranged, of the coil framework; the surge protection coil is wound at the other end of the coil framework and located at one end where the movable iron core is arranged; and when an electric leakage fault occurs, the movable iron core moves toward one side of the mandril and pushes out the mandril, so that the earth leakage circuit breaker is tripped. The tripping device for the electronic type earth leakage circuit breaker adopts arrangement of one surge protection coil and one electric leakage tripping driver coil, andthe surge protection coil effectively avoids false tripping, caused by emergence of an instant high-surge voltage, of the earth leakage circuit breaker and has relatively high surge voltage antijamming capability; and the overall structural arrangement is reasonable and compact.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to an electronic leakage protection switch tripping device. Background technique [0002] Such as figure 1 The electronic leakage protection switch shown will generally trip under the following conditions: When a high surge voltage appears between the L pole and the N pole instantaneously, the varistor RV1 is turned on due to the instantaneous high voltage, and the leakage tripping device A current I is generated on the coil L1, causing the leakage protection switch to trip. However, in practical applications, we do not want the switch to trip due to an instantaneous high surge voltage, because this will cause the application circuit to be powered off by mistake. [0003] Such as figure 2 In the electronic leakage protection switch shown, in order to prevent the circuit from being powered off accidentally due to the instantaneous high surge voltage, the varistor ...

AI Technical Summary

Problems solved by technology

[0002] like figure 1 The electronic leakage protection switch shown will generally trip under the following conditions: When a high surge voltage appears between the L pole and the N pole instantaneously, the varistor RV1 is turned on due to the instantaneous high voltage, and the leakage tripping device A current I is generated on the coil L1, causing the leakage protection switch to trip

In practical applications, we don't want the switch to trip due to instantaneous high surge voltage, because this will cause the application circuit to be powered off by mistake

[0003] like figure 2 In the electronic leakage protection switch shown, in order to prevent the circuit from being powered off accidentally due to the instantaneous high surge voltage, the varistor RV1 is moved to the front end of the coil L1, but the energy level of the varistor RV1 must be increased. The cost and volume will increase accordingly

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