Test time requirements for dynamic characteristic tester of high-voltage switchgear

The high-voltage switch dynamic characteristic tester (circuit breaker analyzer) is widely used for timed testing of circuit breakers, CB timed testing, switch characteristic testing of SF6 switchgear, GIS combination electrical, vacuum switches, oil switches and column switches, contacts, etc.
The specific testing requirements and frequency are as follows:
1. Measurement time: not less than the closing time of the circuit breaker, with a resolution of 0.01ms;
2. Time measurement error: within 200ms ± 0.1ms, above 200ms ± 2%;
3. Synchronization time measurement error: The synchronization time of the tester shall not exceed ± 0.1ms;
When measuring the closing and opening time of a circuit breaker, the triggering time difference between the closing power supply and the opening power supply should be set:
Opening and closing time S1=closing time+no current gap time closing time
Closing time S2=Closing time+Short opening time for gold
Among them, the opening time and closing time are pre measured. The high-voltage switch manufacturer provides no current gap and metal short-circuit time, and the set time should be slightly less than the specified value (if the standard for no current gap time is 300ms, it can be set) by about 280ms; If the metal short circuit time is 60 milliseconds, it can be set to around 50 milliseconds.
Analysis and Processing of Test Data for High Voltage Switch Dynamic Characteristics Tester
1. The test results should be compared with the values given in the circuit breaker manual and should comply with the manufacturer's requirements;
If there are test data in the testing project that do not meet the manufacturer's requirements, first check whether the wiring, parameter settings, and instrument conditions meet the testing requirements;
When the opening time does not meet the specification requirements, the possible reasons are: firstly, the position of the opening electromagnet top rod and the opening switch is not appropriate; Secondly, I am tired of spring; Thirdly, the opening distance or overtravel does not meet the requirements. According to the manufacturer's technical requirements, adjust the starting electromagnet, opening and closing spring, and mechanism connecting rod;
When the closing time does not meet the standard requirements, the possible reasons are: first, the single opening and closing time does not meet the standard requirements; Secondly, the circuit breaker operating mechanism has tripping performance. Based on a comprehensive analysis of the above reasons, adjust the single opening and closing time or release time according to the manufacturer's technical requirements;
When the values from different periods do not meet the standard requirements, possible reasons include: firstly, the distance between the three-phase openings is not consistent; Secondly, the electromagnetic action time of the splitting mechanism is inconsistent. The above reasons should be analyzed comprehensively. The operation of the electromagnet, the opening and closing spring, and the mechanism connecting rod should be adjusted according to the manufacturer's technical requirements