Applying an AC sine wave 50 Hz
voltage 2500 V
applied to the time one second
parts are applied
between all live parts and exposed conductive parts
per pole and do this test between all the other poles connected to the exposed conductive parts of the corresponding connection
when routine tests , pressing time of 1 second, when the verification test, the pressure time is 5 seconds
Conclusion: Do not have a breakdown or flashover
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