T/MZIS 0002-2021 Spark test machine calibration specification

Scope

Main technical content: 5.1 Sensitivity requirements of the spark tester: When an artificial breakdown device is temporarily connected between the high-voltage power supply's test electrode and ground, the spark tester should indicate a breakdown. 5.1.1 Under a power frequency high-voltage test voltage of 3kV (rms), when the spark gap of the artificial breakdown device is temporarily short-circuited, the steady-state current should not exceed 600μA. If necessary, adjust the series resistance. After the artificial breakdown device rotates continuously for 20 times, the number of breakdowns recorded by the spark tester's breakdown counter should match the actual number of breakdowns. 5.1.2 Under a DC high-voltage test voltage of 5kV, when the spark gap of the artificial breakdown device is temporarily short-circuited, the steady-state current should not exceed 600μA. If necessary, adjust the series resistance. After the artificial breakdown device rotates continuously for 20 times, the number of breakdowns recorded by the spark tester's breakdown counter should match the actual number of breakdowns. 5.2 Stability 5.2.1 Set the power frequency high-voltage power supply to the maximum nominal test voltage, short-circuit the current-limiting resistor of the artificial breakdown device, and connect a 500pF capacitor in parallel with the spark gap. After rotating continuously for 20 times, the number of breakdowns recorded by the spark tester's breakdown counter should match the actual number of breakdowns. 5.2.2 Set the DC high-voltage power supply to the maximum nominal test voltage, short-circuit the current-limiting resistor of the artificial breakdown device, and rotate the artificial breakdown device continuously for 20 times. The number of breakdowns recorded by the spark tester's breakdown counter should match the actual number of breakdowns. 5.3 Test voltage The indication error of the spark tester's test voltage output should not exceed ±5%. 5.4

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