Modified and upgraded intelligent pole-mounted vacuum circuit breaker

Abstract

The invention provides an improved and upgraded intelligent pole-mounted vacuum circuit breaker. A miniature capacitive PT energy taking device and a signal processing unit are mounted on a circuit breaker body, and the signal processing unit is connected with a front-end acquisition device through a cable. The signal processing unit can amplify signals of three measurement voltages, one zero-sequence voltage, three measurement currents and one zero-sequence current of one circuit line and acquire signals of two direct-current quantities. The front-end acquisition device comprises a sampling unit, a main control unit, a communication module and a power supply unit; the sampling unit is used for receiving signals of the signal processing unit. The main control unit comprises an ARM microprocessor circuit and a three-section type direction overcurrent protection and zero sequence direction protection circuit. The communication module comprises an Ethernet communication circuit, a serialport communication circuit, a GPRS communication circuit and an RS232 / 485 communication circuit. The circuit breaker has the beneficial effect that data support can be provided for distribution network management. The circuit breaker adopts an integrated design and is simple to install on site.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to an intelligent post-mounted vacuum circuit breaker. Background technique [0002] With the development of the economy and the progress of the society, relying on modern information, communication and control technology to improve the intelligence level of the power grid is the future development trend of the power grid. For this reason, power supply enterprises have accelerated the pace of power grid informatization, automation, and interactive construction, especially in the automation of distribution networks, the work of upgrading and transformation is very urgent. [0003] In the current power distribution lines, there are many old vacuum circuit breakers, and the functions of the circuit breakers need to be updated and upgraded urgently. When the current distribution line is in normal operation, the operating data such as load distribution, line voltage, and switch status cannot be gras...

AI Technical Summary

Problems solved by technology

When the current distribution line is in normal operation, the operating data such as load distribution, line voltage, and switch status cannot be grasped in real time; the fault detection and analysis in the line is not comprehensive enough, and the line fault cannot be found at the first time, and quickly Locating and isolating faulty areas

Replacing with brand new equipment requires significant capital investment

Images