Transformer Oil Dielectric Breakdown Test (ASTM D1816/D877)

Inspection template for recording transformer oil dielectric breakdown voltage (BDV) results on sampled insulating oil per ASTM D1816 or ASTM D877, documenting dielectric strength, test conditions, and compliance disposition.

Inspection Identification and Sample Traceability

• Asset or transformer identification recorded
  Enter the equipment ID, transformer nameplate number, or asset tag associated with the sampled oil.
• Sample ID and collection date/time recorded
  Document the unique sample identifier and when the oil specimen was collected.
• Sample source and location documented
  Record the source compartment or sampling point, such as main tank, conservator, or bushing compartment.
• Test standard selected
  Select the method used for the dielectric breakdown test.
• Chain of custody maintained
  Confirm the sample remained identified and controlled from collection through testing.
• Reference procedure or lab SOP available
  Enter the internal procedure, laboratory SOP, or work instruction used for the test.

Specimen Condition and Test Setup

• Oil specimen visually acceptable for test
  Confirm the specimen is suitable for testing and does not show obvious contamination, excessive free water, or foreign matter that would invalidate the run.
• Test cell clean and dry
  Confirm the dielectric test vessel or cell is clean, dry, and free of residue before filling.
• Electrode condition acceptable
  Verify electrodes are clean, properly spaced, and free of pitting, corrosion, or contamination.
• Instrument calibration current
  Confirm the dielectric test set or BDV tester is within calibration and suitable for use.
• Test temperature recorded
  Record the specimen temperature at the time of test.
• Standards and acceptance criteria identified
  Document the applicable acceptance limit, utility specification, OEM requirement, or internal threshold used to judge the result.

Dielectric Breakdown Test Results

• First breakdown voltage
  Enter the first measured breakdown voltage.
• Second breakdown voltage
  Enter the second measured breakdown voltage.
• Third breakdown voltage
  Enter the third measured breakdown voltage.
• Fourth breakdown voltage
  Enter the fourth measured breakdown voltage.
• Fifth breakdown voltage
  Enter the fifth measured breakdown voltage.
• Average breakdown voltage
  Record the calculated average BDV for the specimen.
• Test anomalies noted
  Indicate whether arcing irregularities, unstable readings, or other anomalies occurred during the test.

Compliance Review and Disposition

• Result meets acceptance criteria
  Confirm the average BDV meets the applicable specification or internal acceptance limit.
• Disposition selected
  Select the final disposition for the oil sample based on the test result.
• Corrective action or follow-up required
  Describe any required retest, filtration, dehydration, oil replacement, or maintenance follow-up.

Sign-Off and Traceability

• Inspector name and signature
  Inspector or analyst signs to confirm the recorded results are accurate.
• Review date and approval
  Record the date and time the inspection record was reviewed or approved.
• Supporting evidence attached
  Attach a photo, scan, or lab report image if available.