Dari Electric recommends
The Dari high-voltage circuit breaker mechanical dynamic characteristics tester adopts high-tech technology, integrating computer, printer, measurement interface circuit, and operating power supply into one unit. It is a new special instrument for high-voltage circuit breaker detection. This tester is equipped with two displacement sensors suitable for different distances and precision tests. The instrument's automatic identification system identifies the selected sensor and completes distance and speed measurement for low-oil, multi-oil, SF6, and vacuum high-voltage circuit breakers. In the design of the instrument, only one closing (or opening) operation is needed to sample and record all data of six breaks. Measurement results can be displayed with a single key operation, and the measurement data can be printed, including current waveform diagrams of six breaks and the time characteristic curve of the moving contact of one break. The instrument's design strictly follows the definitions in the national standards "GB 1984" and "GB 3309" for data processing.
Functions and Features of Shanghai High-Voltage Circuit Breaker Mechanical Dynamic Characteristics Tester
1. Test Functions
(1) Closing (opening) sequence Measure one to six breaks simultaneously
(2) Three-phase non-simultaneity Measure one to six breaks simultaneously ms
(3) Same-phase non-simultaneity Measure one to six breaks simultaneously ms
(4) Closing (opening) time Measure one to six breaks simultaneously ms
(5) Closing (opening) bounce time Measure one to six breaks simultaneously ms
(6) Closing (opening) speed Measure one break m/s
(7) Maximum closing (opening) speed Measure one break m/s
(8) Average closing (opening) speed Measure one break m/s
(9) Moving contact travel Measure one to six breaks simultaneously mm
(10) Moving contact overtravel (contact travel) Measure one to six breaks simultaneously mm
(11) Close-open time (metal short-circuit time) ms
(12) Dead time (no-current interval time for auto-reclosing) ms
2. Main Performance and Features of the Instrument
(1) The instrument adopts high-stability components, floating, large-area, digital filtering and other anti-interference technologies.
(2) The instrument is equipped with two displacement sensors, suitable for testing high-voltage circuit breakers with different distance, speed, and precision requirements. When different sensors are inserted, the instrument will automatically identify them. The instrument can automatically identify closing (opening) operations and reclosing operations of high-voltage circuit breakers, and automatically collect all data after operations. The measurement and calculation process is automatically completed by the CPU.
(3) The instrument has automatic identification capability and strong self-protection functions for wiring errors during measurement and incorrect commands or unsuccessful operations.
(4) The instrument displays the closing (opening) sequence and the actual closing (opening) time of each break, providing a basis for maintenance and debugging of three-phase non-simultaneity and same-phase non-simultaneity of high-voltage circuit breakers. For time-related data, values less than 0.1 milliseconds are automatically not displayed or output.
(5) For measurement of moving contact travel and overtravel, only installing the sensor on any one phase of the high-voltage circuit breaker allows simultaneous measurement and calculation of travel and overtravel data for all three phases' breaks. The speed measurement accuracy of the instrument is 1% m/s.
(6) The power supply box provides 0-250V DC operating power for direct operation of high-voltage circuit breakers. It is suitable for operating mechanisms with electromagnetic, hydraulic, spring energy storage, and other DC control types.
(7) The instrument is small in size, light in weight, simple to operate, and easy to carry. It is especially suitable for field mobile testing and on-site maintenance testing in substations. It is an essential tool for production, inspection, maintenance, and debugging of high-voltage circuit breakers.
Note: The above information and technical parameters are compiled and released by Yangzhou Dari Electric Co., Ltd.
