Switch characteristic tester accurately records opening operation
Switch characteristic tester (often called high-voltage switch dynamic characteristic tester, circuit breaker mechanical characteristic tester) is a "physical examination instrument" in the power system specifically used to detect the mechanical performance of high-voltage circuit breakers (switches). High-voltage circuit breakers undertake the dual tasks of control and protection in the power grid. Whether their mechanical actions are precise and rapid directly affects the safe operation of the power system.
⚡ Core Working Principle
The core principle of the switch characteristic tester is to capture the opening or closing action of the circuit breaker comprehensively through precision sensors and high-speed data acquisition systems:
Time Measurement: The instrument connects to the moving and static contacts of the circuit breaker via contact signal lines. When the circuit breaker operates, the opening or closing of the contacts changes the circuit's on-off state. The instrument accurately records the moment of opening and closing, thereby calculating time parameters such as inherent operation time and three-phase asynchrony.
Speed and Stroke Measurement: Through displacement sensors (such as linear sensors, rotary sensors, etc.) installed on the moving contact or rotating shaft of the circuit breaker, the distance and speed signals of the contact movement are collected in real time.
Data Processing and Waveform Analysis: The built-in high-performance processor (such as a microcontroller or embedded industrial computer) performs high-speed calculations on the collected time, displacement, current and other signals, automatically generates speed-stroke curves, current waveform diagrams, etc., and automatically calculates key mechanical parameters such as opening/closing speed, bounce times, and overtravel.
