Certificates & Qualifications

Internationally recognized quality — documents available for download on request

Certified Quality

Certificates & Qualifications

All certificates and high-resolution scanned copies (PDF / JPG) can be sent to you together with our quotation on request.

Business Registration

Business license of Wuhan Defu Electric (Yoanpower factory) — Three-in-One Business License

ISO 9001:2015 Quality Management System

ISO 9001:2015 certificate (Chinese version) — ISO 9001:2015 (CN) · No. 16426Q01308R001

ISO 9001:2015 certificate (English version) — ISO 9001:2015 (EN) · Valid until 2029-06-16

Issued by Huazhong International Certification & Inspection Group (IAF / CNAS C164-M). Download original PDF

Industry Standard Drafter

DL/T 848.1-848.5-2004 power industry standard drafted by Defu Electric — DL/T 848.1–848.5-2004 co-drafted

Association Membership

Hubei Electric Power Measurement and Testing Association member plaque — Hubei EPMTA Member (No. 040)

Science & Technology Progress Awards

Science and Technology Progress Award WGK3-04 — Award No. 2008WGK3-04 (Third Prize)

Science and Technology Progress Award WGK3-05 — Award No. 2008WGK3-05 (Third Prize)

Software Copyrights

Software copyright certificate — intelligent withstand test operating system — Intelligent Withstand Test OS V1.0

Software copyright certificate — oil-immersed transformer monitoring system — Transformer Monitoring System V1.0

Software copyright certificate — automatic power-frequency withstand test system — Automatic PF Withstand Test System

Software copyright certificate — resistance performance test system — Resistance Test System V1.0

Software copyright certificate of Wuhan Defu Electric — Software Copyright Certificate

Software copyright certificate — transformer comprehensive test system — Transformer Test System V1.0

Patents

Utility model patent — inflatable test transformer equipment, Wuhan Defu Electric — ZL 2022 2 0423157.5 · Inflatable Test Transformer

High-Tech Enterprise

High-tech enterprise certificate GR202242003476 of Wuhan Defu Electric — Certificate No. GR202242003476

Per-Shipment Quality

Every Unit Ships With:

Factory Test Report

Full calibration & function test data of your exact serial number.

COA & Warranty Card

Certificate of analysis, 12-month warranty and lifetime support terms.

Export Packing List

Sea/airworthy wooden cases with ISPM-15 marks, complete manuals in English.