GB/T 1984—2014 sets clear requirements for the measurement uncertainty of circuit breaker opening and closing times. During on-site selection, it is recommended to first confirm whether the time resolution reaches 0.01 ms and whether the travel resolution reaches 0.1 mm. These two indicators directly affect the reliability of determining parameters such as opening and closing asynchronism and bounce time. If the instrument's resolution is insufficient, key data points may be lost when measuring the short arcing process of vacuum circuit breakers.
The KC-8600 Switch Characteristic Tester has a built-in DC30–250V/20A digitally adjustable operating power supply, eliminating the need for an external power box. The fully automatic low-voltage test function requires only one voltage value to be set, and the instrument can automatically complete the operating voltage search and record the return voltage, reducing the amount of manual point-by-point adjustment. For on-site operation and maintenance personnel, this function is quite practical when the power outage maintenance window for switchgear is relatively short.
During selection, it is necessary to confirm the types of sensors supported by the instrument. The KC-8600 can be connected to linear displacement sensors, angular displacement sensors, and general-purpose rotary encoders, covering the travel measurement needs of vacuum, SF6, and minimum-oil circuit breakers. The compatibility of the mounting bracket is also worth attention. It is recommended to choose a model that provides multiple fixture options to reduce rework caused by mismatched installation methods.
The instrument should have local storage and USB export functions to facilitate operation and maintenance personnel in organizing test reports after returning to the team. The KC-8600 can store multiple sets of test data and supports exporting time-travel curves in a standard format, making it convenient for comparative analysis with historical data.
