Sulfur hexafluoride breaker intelligent opening-and-closing brake operation mechanism

Abstract

The invention relates to a sulfur hexafluoride breaker intelligent dived-shut brake operation mechanism. The sulfur hexafluoride breaker intelligent divide-shut brake operation mechanism is used on an actuator of a power transmission and transformation system high voltage and high power switch or other divide-shut brake switches driven by a direct 220 V motor, and belongs to a central part of the high power switch actuator. The current sulfur hexafluoride breaker divide-shut brake operation mechanism used for power transmission system is still a traditional product, and is formed by a plurality of relays and complicated interlock circuits of the relays. A temperature switch is used for detecting over-current, and a time relay is used for measuring instruction execution timeouts to protect the current sulfur hexafluoride breaker divide-shut brake operation mechanism. The composition of the current sulfur hexafluoride breaker divide-shut brake operation mechanism has the disadvantages of being complex in composition, large in volume, short in service life, and high in cost; a relay arc-pulling phenomenon exists. The sulfur hexafluoride breaker intelligent dived-shut brake operation mechanism replaces a secondary relay control circuit by a single-chip microcomputer software and hardware, and a direct current (DC) 5V electronic circuit, uses a high power electronic element to replace an electromagnetic relay. A switching power supply and a photoelectric coupling isolation technique enable the sulfur hexafluoride breaker intelligent dived-shut brake operation mechanism to have functions of intelligent judgment and control, so that the shortcomings of traditional products are overcome.

Description

1. Technical field Opening and closing control of high-power high-voltage switches. It is mainly used in the actuators of high-power high-voltage switches in power transmission systems. 2. Technical background At present, the SF6 circuit breaker opening and closing operating mechanism used in the power transmission system is still a traditional old product, which consists of 4 relays and their complicated interlocking circuits. According to the DC220V command signal, it controls the forward and reverse rotation of the motor by changing the current direction of the DC220V DC motor, converts the electromagnetic force into mechanical force, and makes the moving contact of the switch move right and left through a connecting rod to complete the control of high-power Opening and closing control of high voltage switch. This kind of operating mechanism is complex in composition, large in size, short in life, high in failure rate, and may cause arcing and ignition of the relay; usi...

AI Technical Summary

Problems solved by technology

This kind of operating mechanism is complex in composition, large in size, short in life, high in failure rate, and may cause arcing and ignition of the relay; using an air switch to detect overcurrent has poor accuracy and slow response speed

Images