Controller of low pressure intelligent type circuit breakers with mutual verifying function

Abstract

The invention discloses a controller for a low-voltage intelligent breaker with mutual-checking function, comprising a three-phase signal collecting circuit (that processes the three-phase current signals of the power grid and then transmit the signals into the comprehensive system-data processing circuit), a power grid voltage frequency testing circuit (that processes the power grid voltage signals and then sends the signals into the comprehensive system-data processing circuit), a power line carrier data communication circuit (that modulates the digital signals transmitted from the comprehensive system-data processing circuit into carrier-frequency analogue signals and releases the signals on the power grid, and demodulates digital signals from the carrier-frequency signals transmitted into the power grid and transmits the digital signals into the comprehensive system-data processing circuit), a comprehensive system-data processing circuit (that controls tripping, connecting, displaying and alarming after data processing). The invention has the advantages of that long-time delay overcurrent protection, short-time delay overcurrent protection and momentary overcurrent protection are implemented on the power line; in a power supply / distribution system that needs no computer network for monitoring, mutual monitoring between the upper and lower grades of nodes is realized, and reliable operation of the current protection system is ensured.

Description

technical field [0001] The invention relates to a controller for a low-voltage intelligent circuit breaker, in particular to a controller for a low-voltage intelligent circuit breaker with a mutual verification function. Background technique [0002] Conventional low-voltage intelligent circuit breakers, such as the patent application No. "02138329.4" named "Intelligent Monitoring Circuit Breaker", are isolated from each other in the power supply and distribution system, and there is no mutual supervision mechanism established between upper and lower nodes . In the case of misalignment of one of the nodes, the conventional low-voltage intelligent circuit breaker cannot alarm due to the lack of mutual detection function, and finally the overcurrent protection of the branch is in an abnormal state for a long time. Although another patent application has proposed an intelligent circuit breaker with a communication interface that can be networked with a computer, such as the pa...

AI Technical Summary

Problems solved by technology

In the case of misalignment of one of the nodes, the conventional low-voltage intelligent circuit breaker cannot alarm due to the lack of mutual detection function, and finally the overcurrent protection of the branch is in an abnormal state for a long time

Although another patent application has proposed an intelligent circuit breaker with a communication interface that can be networked with a computer, such as the patent application with the patent application number "200610025257.8" and the name "circuit breaker controller", but additional communication lines or networks need to be established , increasing the cost of using

Images