During the design and selection phase, it is necessary to confirm whether the tester can cover all switch types in the station and adapt to complex electromagnetic environments. The KC-7500 Switch Characteristic Tester is designed for the mechanical characteristic testing needs of switches with multiple voltage levels and multiple arc-quenching media, and its technical specifications and anti-interference measures can serve as a basis for selection comparison.
The time measurement range can reach 25000.0ms, with a minimum resolution of 0.01ms and a high-precision range error of 0.1ms ± 1 digit. The instrument is equipped with 12 independent metal contact time channels, which can synchronously acquire break contact opening and closing signals; combined with linear, rotary, or acceleration displacement sensors, it obtains travel displacement signals; at the same time, it records coil current signals. Based on high-speed data acquisition and multi-channel synchronous trigger technology, it records the time series of each channel with microsecond-level precision, and is suitable for testing and measuring mechanical characteristic parameters of high-voltage switches in power systems such as vacuum, sulfur hexafluoride, low-oil, and multi-oil switches.
A built-in isolated adjustable DC power supply (DC 6V–270V continuously adjustable) simulates switch operation commands and directly controls the circuit breaker for opening, closing, reclosing, and other operations. Data processing adopts a high-performance embedded industrial control platform, calculates various mechanical characteristic parameters in real time, and displays and prints test data as well as time-travel curves, speed-travel curves, and current waveform curves.
By adopting technologies such as induced electricity discharge protection circuits, floating design, large-area grounding, and digital filtering, it can work reliably in strong electromagnetic field environments of 500kV and even 800kV substations. During selection, the voltage level in the station and the distribution of interference sources can be combined to evaluate whether its anti-interference configuration meets on-site testing requirements.
