Meet Our Quality Team
We have a professional quality inspection team of over 30 members, who receive more than 200 hours of specialized training every year. All team members are certified under CNAS standards, which ensures that every product meets strict quality requirements.
With over 60 years of experience in transformer manufacturing, our company has earned the trust of China State Grid and China Southern Power Grid, and we have maintained a zero-quality incident record.
In addition, the team conducts regular training for international certifications, including UL and CE, to guarantee that our products are compliant and reliable in global markets.
Premium Raw Materials
from Leading Suppliers
We source our core materials from top suppliers: high-permeability silicon steel sheets from Baowu Steel (Grade A), and insulation materials from globally recognized brands such as DuPont Nomex® and Vishay® . This ensures consistent quality and reliable performance for every transformer we deliver.
Transformer Quality Inspection Process
This table outlines our transformer quality inspection process from raw materials to final testing, showing key control points and
relevant standards, and reflecting our commitment to quality and compliance.
|
Stage |
Key Control Points |
Standards |
|
Incoming material inspection |
Magnetic core loss of silicon steel and thermal class of insulation paper |
Tested in accordance with GB/T 2521 (China) and IEC 60641 international standards |
|
Production process control |
Core lamination precision (±0.02 mm) and winding turn-to-turn withstand voltage |
Tested in accordance with JB/T 501 and IEEE C57.12.00 standards |
|
In-factory quality testing |
No-load loss (≤102% of rated value) and partial discharge (≤5 PC) |
Tested in accordance with IEC 60076 and GB 1094.11 standards |
|
Third-party testing |
Certified by KEMA (Netherlands) and CQC |
Independently tested by internationally recognized authorities |
Our Core Testing Equipment
Performance Tests
Voltage Ratio & Tap Position Test
Winding Resistance Measurement
Load and No-load Loss Measurement
Impedance Voltage Test
Safety / Reliability Tests
Insulation Resistance Test
Withstand Voltage Test
Oil Pressure and Seal Tightness Test
Oil Dielectric Strength Test
Partial Discharge Test
After-Sales Service
Our complete units come with a three-year warranty and free lifecycle maintenance guidance, and the accessories are covered for two years. Meanwhile, professional technical support ensures your equipment operates reliably over the long term.
