Engineering and manufacturing for power distribution
Located in Yueqing Economic Development Zone, Zhejiang Province, known as the Electrical Capital of China, JOHNN operates a modern manufacturing facility covering more than 18,000 square meters. We specialize in the research, development and manufacturing of power transformers, instrument transformers, and low- and medium-voltage electrical enclosures and switchgear solutions.
Advanced manufacturing and engineering
Committed to IEC and GB standards, JOHNN has established in-house capabilities spanning electromagnetic design and engineering, precision sheet-metal fabrication and final assembly. Our production equipment includes automatic winding machines, vacuum varnish impregnation systems, CNC sheet-metal processing equipment and high-precision testing facilities.
Products undergo inspection for critical parameters including:
- Dielectric withstand voltage
- Partial discharge
- Temperature rise
- Electrical performance
- Mechanical reliability
Stable manufacturing processes and a stringent quality-management system support ODM and OEM manufacturing for electrical equipment brands.
Serving global projects
JOHNN products are supplied to customers across the Middle East, Africa and Europe. They are applied in power distribution networks, renewable-energy projects, industrial facilities, infrastructure construction and utility-grid modernization.
Our vision
Powered by intelligent manufacturing in China, delivering reliable energy to the world.