Protection circuit, control method of protection circuit, telecommunication plug-in shelf device

Abstract

The embodiment of the invention provides a protection circuit, a control method of the protection circuit, a telecommunication plug-in shelf device. The protection circuit comprises a sampling module, an equipment power supply loop, a processing module, a judging module and a drive module, wherein the sampling module is used for sampling from the equipment power supply loop to obtain a sampling signal, the equipment power supply loop is a circuit between a power supply in the telecommunication plug-in shelf device and at least one slot in the telecommunication plug-in shelf device, the processing module is used for accumulating and maintaining the sampling signal and obtaining a corresponding charge voltage after the sampling signal is accumulated, the judging module is used for comparing a charging voltage with a preset reference voltage and sending a control signal to a drive module when the difference value beween the charging voltage and the preset reference voltage is less than or equal to the preset threshold, and the drive module is used for receiving the control signal sent by the judging module and cutting off the equipment power supply loop according to the control signal. According to the technical scheme of the embodiment of the invention, arc can be rapidly extinguished, the arc discharge energy is prevented from being converged and enhanced, the fire is avoided, and the safety of the telecommunication plug-in shelf device is enhanced.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular to a protection circuit, a control method thereof, and a telecommunications subrack device. Background technique [0002] Telecom subrack equipment is a common equipment in the communication field. [0003] Telecom subrack equipment usually uses DC power supply, and usually uses a power supply to implement power supply. A plurality of slots are provided on the back panel of the telecommunications subrack equipment for inserting single boards (also can be called as plug-in cards). The power supply is connected to the single board inserted in each slot through the backplane connector, and supplies power to each single board. If a total of N boards are inserted into the slots of the telecom subrack, and the boards in each slot are the same, that is, the power consumption is shared equally, the current flowing through each board is M, and the power...

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: when contamination (such as foreign objects, etc.) The arc current is far from the protection point of the circuit breaker or the fuse, the protection device of the power supply will not work, and the arc will lead to an increase in energy accumulation, which will cause a fire

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