High-Voltage Technology: Can a high-voltage circuit breaker motion characteristic tester measure with dual-ended grounding?

Can dual-ended grounding be measured?

Dual-ended grounding can be measured, but traditional high-voltage circuit breaker motion characteristic testers cannot perform such measurements. The conditions for dual-ended grounding are relatively complex; measurement accuracy must be ensured while simultaneously dealing with numerous electromagnetic interferences such as impedance and high-frequency currents. Therefore, a high-voltage circuit breaker tester specifically designed for dual-ended grounding is a highly targeted solution, featuring excellent performance and stable functionality, though its price is indeed relatively high.

Application Instructions for Circuit Breaker Motion Characteristics Testing

The main function of a high-voltage circuit breaker motion characteristic tester is to measure the mechanical performance of high-voltage circuit breakers of various voltage levels, types, and brands. This includes five mechanical parameters: closing time, opening time, bounce count, three-phase synchronization, and opening/closing speed. For newly installed systems or low-voltage power systems, after the circuit breaker is removed from service, a standard high-voltage circuit breaker motion characteristic tester can fulfill the testing requirements. However, for high-voltage systems such as 110 kV, 220 kV, and 330 kV, there are specific requirements and standards for measuring high-voltage circuit breakers.

Impact of Dual-Ended Grounding

According to the testing principle, during mechanical characteristic tests of circuit breakers, one side of the grounding disconnector usually needs to be opened to ensure that the test current forms a closed loop. This forces personnel to work on equipment that is not grounded, inevitably creating certain risks for testing operations and being unfavorable for production safety. Dual-ended grounding refers to the capability of completing short-circuit mechanical characteristic tests while both ends remain grounded.

Performance Features and Advantages of High-Voltage Circuit Breaker Testers

High-voltage circuit breaker motion characteristic testers, also known as high-voltage circuit breaker mechanical characteristic testers, integrate large-scale programmable logic circuits with high-voltage equipment measurement technologies. They efficiently and conveniently process mechanical performance parameters including time, speed, synchronization, stroke, over-travel, contact gap, bounce, coil current, and low-voltage operation characteristics.

Equipped with linear sensors, angular sensors, and universal data acquisition units, they fulfill essential functions for data measurement and dynamic analysis. With a human-machine interactive operating interface, they are designed to measure mechanical parameters of various high-voltage circuit breakers—including vacuum circuit breakers, SF6 circuit breakers, minimum-oil circuit breakers, and bulk-oil circuit breakers—across all voltage levels.