KDGK-500Z AC/DC Circuit Breaker Coordination Tester is a portable, intelligent field instrument designed for on-site verification of protective device coordination in AC and DC power systems. It ensures reliable selective tripping between upstream and downstream breakers in substations and industrial facilities, enhancing system reliability and grid safety—ideal for maintenance teams performing compliance checks on protection hierarchies.
The KD-920S Portable Coating Thickness Gauge is a dual-principle, handheld instrument that integrates magnetic induction and eddy current technologies in one compact device. It enables fast, non-destructive, and high-precision measurement of coating thickness on both magnetic and non-magnetic metal substrates. Designed for versatility, it performs reliably in laboratory settings as well as demanding industrial field environments, making it an essential tool for quality control and material protection across multiple industries.
The KDZD Series High-Voltage Phase Comparator is a purpose-built safety instrument designed for accurate phase verification in electrical power systems. Based on metal-film resistor voltage division technology, it uses an analog pointer meter to clearly indicate whether two high-voltage lines are in-phase (near-zero reading) or out-of-phase (full-scale reading). The device integrates three essential functions: phase comparison, live-line detection, and ground fault indication. Available in models covering 0.4 kV to 220 kV, the KDZD series combines portability, robust insulation, and intuitive operation—making it an indispensable tool for substation operators, field technicians, and maintenance crews.
The KDZD High-Voltage Phase Comparator is a lightweight, reliable, and field-proven instrument designed for accurate phase verification in power systems. Utilizing metal-film resistor voltage reduction technology, it enables operators to safely determine whether two high-voltage lines are in-phase or out-of-phase by observing an analog pointer display. In addition to phase checking, the KDZD also supports high-voltage live-line detection and ground fault location, making it an essential tool for substation commissioning, maintenance, and emergency troubleshooting.
This high-voltage switch comprehensive testing system integrates mechanical characteristic testing and 100A three-phase circuit resistance measurement, supporting full function testing of various circuit breakers such as SF6, vacuum, oil switches, and GIS. One operation can obtain all parameters and maps such as opening and closing time, speed, stroke, bounce, current waveform, and operating voltage. It has high accuracy (error ≤ 0.5%), strong anti-interference ability, and can work stably in a 500kV live environment. The device is equipped with tablet control, Chinese menu, built-in printer, and PC analysis software, making it easy to operate and suitable for efficient and precise testing needs in power systems, switch manufacturing plants, and engineering sites.
This high-voltage switch comprehensive testing system integrates mechanical characteristic testing and three-phase main circuit contact resistance testing, supporting multiple types such as double ended grounding switches, graphite/metal contact switches, and switches with closing resistors. It can complete full parameter measurements such as opening and closing time, speed, stroke, bounce, current, and 100A × 3 circuit resistance in one go. The equipment has strong anti-interference ability and is suitable for complex electromagnetic environments such as 500kV substations. It is equipped with a tablet computer interface, Chinese menu, built-in printer, and PC online analysis software, making it easy to operate and accurate in data. It is a cost-effective comprehensive testing solution for the power system and switch manufacturing industry.
The KDGK-II high and low voltage switchgear power on test bench is used by high and low voltage switchgear manufacturers to test the high and low voltage switchgear they produce
Conduct various power on tests before leaving the factory. It can provide various AC and DC power sources, facilitating the detection of switchgear and improving work efficiency
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KDYDJ-5kVA/30kV intelligent industrial frequency withstand voltage test device product implementation standard: DL/T 845.1 2004. Adopting microelectronic chip processing technology, touch screen control and wireless mobile phone APP operation, the operation is simple and clear. After all the parameters are set, the test is automatically carried out without manual intervention.
The KDGK-MH high-voltage circuit breaker comprehensive action characteristic break in test bench can be used for break in testing of high-voltage switches in power systems with various voltage levels, such as vacuum, sulfur hexafluoride, low oil, and high oil. Stable measurement data, strong anti-interference ability, easy wiring, and simple operation make it a convenient tool for high-voltage switch maintenance and testing.
The KDGK-VI high-voltage switch running in test system is designed for the running in test of circuit breakers (high-voltage switches) and contactors (only closing coils).
