DC remote power supply input grounding detection circuit and its detection method

Abstract

The invention disclose a direct-current remote supply power input grounding detection circuit and a detection method thereof. The circuit is composed of an input resistance-to-ground sampling module, an input grounding mode determination module, an input grounding alarm reporting module and an MCU control module; the input resistance-to-ground sampling module and the input grounding mode determination module are electrically connected; and the input grounding mode determination module and the MCU control module are electrically connected by the input grounding alarm reporting module. According the invention, the 48-V input grounding characteristic is utilized, a ground voltage sampling loop is provided by using resistors, logic analyzing and determination are carried out by using different grounding modes, and grounding modes with different inputs are distinguished, so that objectives of input grounding detection and fault alarming are achieved. Therefore, alarming of poor input grounding and reporting are realized and thus security and reliability of power supply usage are improved. Moreover, the method is simple and practical; and great benefits can be provided for direct-current remote supply application reliability.

Description

technical field [0001] The invention relates to the communication field, in particular to a DC remote power supply input grounding detection circuit and a detection method thereof. Background technique [0002] In recent years, my country's communication industry has developed rapidly. The communication power supply is the infrastructure of the entire communication network and the guarantee for the normal and reliable operation of the entire communication and telecommunication network. With the popularization and development of the 3G network, the construction of mobile base stations, EPON and indoor and outdoor computer rooms The problems of power supply and connection are all completed by the DC remote power supply circuit. The grounding of the DC remote power supply circuit is very important, because the leakage current protection and AC lap protection stipulated in the industry standard are judged and realized for the loop formed by the earth PE and the positive and negat...

AI Technical Summary

Problems solved by technology

This kind of measure has no way to prevent the construction personnel from forgetting to ground due to negligence, which brings great hidden dangers to the safety and reliability of the power circuit.

Images