5. Winley Certification Case: Test Items, Certified Sample and Nameplate Correspondence

In Winley Electric’s E536138 three-phase pad-mounted transformer certification case, the documentation is organized around traceability. The UL/cUL certificates define the certified product category, applicable standards and model range. The listed test items show the key verification areas, including electrical performance, insulation, temperature rise, sealing, mechanical structure and enclosure integrity. The certified sample or same-series product photos help illustrate the transformer structure, while the nameplate photo supports cross-checking of the model, rated capacity, voltage, phase, frequency and serial number against the certified scope.

Sample for authentication:

6. Certificate Numbers and Issue Information

7. Substantive Value: Production Consistency and Factory Surveillance

The value of UL certification is not limited to a certificate. After certification, the manufacturing location and certified product are typically covered by UL Follow-Up Services, which are intended to confirm that UL Certified products continue to comply with the original certification requirements.

This drives consistency control over component selection, nameplate management, assembly process, tank sealing, connection structure, factory testing and record traceability. For batch delivery, customers care not only about the tested sample but also whether subsequent shipments remain consistent with the certified sample.

8. Customer Procurement Value

For North American buyers, EPC contractors and engineering consultants, the E536138 UL/cUL certification documentation can support technical review, tender submission, supplier qualification and site acceptance preparation. Customers can check the certificate number, report reference, applicable standards and certified model scope against the certification requirements specified in project documents.

During project execution, nameplate information such as model number, rated capacity, voltage, phase and frequency can also be cross-checked with the certified scope. This helps reduce repeated communication caused by incomplete certification documents or unclear model coverage. The certification does not replace project-specific approval, customs procedures or final owner acceptance requirements, but it provides a clearer and verifiable compliance documentation basis for customers.

9. Official Verification Links and About Winley Electric