Vacuum Interrupter Integrity Open-Gap Withstand Test

Inspection template for recording high-voltage withstand results across open vacuum interrupter contacts to verify vacuum integrity and identify loss-of-vacuum conditions through withstand failure.

Inspection Identification

• Asset identification recorded
  Record the breaker, recloser, or switchgear asset ID, location, and vacuum interrupter designation being tested.
• Test date and time recorded
  Enter the date and time the open-gap withstand test was performed.
• Inspector and competent person identified
  Record the inspector name and the qualified/competent person overseeing the test.

Safety Controls and Test Readiness

• Lockout-tagout applied and verified
  Verify the equipment is isolated, de-energized, and controlled under an approved lockout-tagout procedure per OSHA 1910.147.
• Appropriate arc-flash and shock PPE in use
  Confirm PPE selection is appropriate for the test setup and voltage exposure, consistent with the site electrical safety program and NFPA 70E.
• Test area barricaded and access controlled
  Confirm the test boundary is established, warning signs are posted, and unauthorized personnel are excluded.

Test Equipment and Setup

• Test instrument identified and calibrated
  Record the withstand test set model, serial number, and calibration due date.
• Test leads, probes, and grounding connections inspected
  Verify leads, clamps, and grounding connections are intact, properly rated, and free of visible damage.
• Open-gap test configuration verified
  Confirm the vacuum interrupter contacts are fully open and the test circuit is connected across the open contacts as required by the procedure.

Withstand Test Parameters

• Applied test voltage recorded
  Record the actual applied withstand voltage used for the open-gap test.
• Test duration recorded
  Record the duration that voltage was applied across the open vacuum interrupter contacts.
• Acceptance criterion documented
  Record the applicable acceptance criterion or procedure reference used for this test, including the required withstand level.

Results and Deficiencies

• Withstand held without flashover or breakdown
  Indicate whether the vacuum interrupter withstood the applied voltage across open contacts without flashover, puncture, or dielectric breakdown.
• Evidence of loss of vacuum observed
  Indicate whether the test result suggests loss of vacuum, such as withstand failure or abnormal discharge behavior.
• Deficiency description and disposition
  Describe any deficiency, non-conformance, or failed interrupter and note the immediate disposition, such as remove from service, retest, or escalate for replacement.

Sign-Off

• Corrective action completed or assigned
  Document any corrective action, work order, or follow-up required after the test.
• Inspector signature
  Inspector attestation that the test was performed and recorded accurately.