Transformer Partial Discharge Test
Partial-discharge testing for applicable medium-voltage dry-type and transformer insulation systems under specified voltage and measurement conditions.
Partial-discharge results depend on the test circuit, background noise, calibration, applied voltage sequence, measuring bandwidth, coupling arrangement, earthing, specimen condition, and acceptance criterion. The report must identify these conditions rather than show only one pC value.
Test scope and acceptance basis
Partial-discharge testing for applicable medium-voltage dry-type and transformer insulation systems under specified voltage and measurement conditions.
Partial-discharge results depend on the test circuit, background noise, calibration, applied voltage sequence, measuring bandwidth, coupling arrangement, earthing, specimen condition, and acceptance criterion. The report must identify these conditions rather than show only one pC value.
Circuit diagram, calibration, noise, voltage-time sequence, readings, acceptance, witness, and signatures.
Products Supported by Transformer Partial Discharge Test
The test scope and quality files must match the actual product, rated data, applicable standard, and confirmed order specification.
How the work is controlled
Inspect the specimen, establish clean connections and earthing, control interference, and measure background noise.
Inject the specified apparent charge and verify the measuring circuit response before the test sequence.
Apply pre-stress and measurement voltages for the specified durations while recording discharge level and behavior.
Compare the corrected maximum value and behavior with the agreed criterion and document noise or anomalies.
Project inputs and acceptance basis
| Test object | Transformer type, rating, voltage, insulation design, winding configuration, enclosure, and specimen condition. |
|---|---|
| Voltage program | Applicable standard, pre-stress level and duration, measurement voltage, sequence, frequency, and acceptance limit. |
| Measurement system | Calibrator, coupling device, detector, bandwidth, background noise, earthing, instrument identification, and calibration status. |
| Reporting | Circuit diagram, calibration, noise, voltage-time sequence, readings, acceptance, witness, and signatures. |
Available project records
Technical questions: Transformer Partial Discharge Test
Does Transformer Partial Discharge Test apply to every transformer?
Applicability depends on product type, rating, applicable standard, and the order specification. Routine tests normally apply to each unit; type or special tests are confirmed by project.
What is the acceptance basis for Transformer Partial Discharge Test?
Acceptance should use the approved data sheet, applicable standard and edition, guaranteed values, tolerances, agreed deviations, procedure, and order requirements.
What should be confirmed before the work starts?
Transformer type, rating, voltage, insulation design, winding configuration, enclosure, and specimen condition.
What test or quality records can be produced?
Partial-discharge test circuit record, Background-noise measurement, Calibration record, Applied-voltage sequence, Measured apparent charge values, Acceptance conclusion and signatures
Discuss your transformer project
Send the available specification, drawing, single-line diagram, test requirement, quantity, destination, and target schedule. We will confirm the applicable equipment and document scope.