The Vacuum Interrupter Tester under Wuhan UHV can help many power workers conduct various power tests more conveniently.
1.Mechanical Characteristic Tests:
Measure Opening/Closing Time (command to full contact separation/closure).
Measure Opening/Closing Speed (average or at critical points).
Check Synchronization (time difference between phases opening/closing).
Perform Operating Voltage Test (reliable operation at min/max voltage specs).
2.Main Circuit Resistance Test:
Measure DC Resistance across closed contacts using a microhmmeter. Compare to specs.
3.Insulation Withstand Tests:
Perform Power Frequency Withstand Test (apply high AC voltage to closed contacts; main indirect vacuum check).
Perform Impulse Withstand Test if required (lightning/ switching surge).
4.Vacuum Integrity Check:
Indirect: Primarily relies on passing the Power Frequency Withstand Test.
Direct: Use a dedicated Vacuum Tester to measure pressure (if equipped).
5.Auxiliary & Control Circuit Checks:
Verify secondary wiring correctness.
Test relay functions (trip/close coils, auxiliary switches, locks).
Test charging mechanism (motor, indication, locks).
Verify anti-pumping and interlock functions (electrical/mechanical).
6.Operational Check:
Perform several manual and electrical open/close operations at rated voltage. Observe smooth, reliable action, correct indication, no abnormal noise.
Core Points: Test timing/speed/sync, measure resistance, perform withstand tests (insulation + indirect vacuum), check control functions, verify final operation.
Safety First: Ensure equipment is de-energized, tested for voltage, discharged, and grounded before testing. Use calibrated instruments.