Transformer Partial Discharge Test for Dry Type Units
Engineering Intent
Partial discharge testing helps evaluate insulation quality in cast-resin dry type transformers, especially for medium-voltage windings.
This article is written for engineers, EPC buyers and procurement teams who need to turn partial discharge test into a clear technical request instead of a vague product inquiry.
Key Selection Data
| Item | Data to Confirm |
|---|---|
| Check 1 | Rated voltage and insulation level |
| Check 2 | Test voltage level |
| Check 3 | Maximum PD value required |
| Check 4 | Whether test witness is required |
Standards and Evidence to Request
- IEC 60076-11 partial discharge references
- Factory test procedure
- Tender PD acceptance requirement
For project approval, request a technical datasheet, outline drawing, wiring or terminal diagram where applicable, routine test report and nameplate information before shipment.
Common Specification Mistakes
- No PD limit in tender
- Comparing tests made under different voltage conditions
- No test report requested
RFQ Checklist
- State PD requirement
- Confirm test voltage
- Request PD report
- Confirm witness test if needed
Related Product Paths
Ziyao Power can review the single-line diagram, load schedule, panel drawing or tender sheet and convert the requirement into a practical quotation package.
Download This Guide as PDF
Save this technical guide for offline reference. Includes all tables, specifications, and contact information.
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