NAIJI Electric factory building
Hangzhou Bay New District, Cixi, Zhejiang, China

Inside Our Switchgear Factory

A Sino-Korean joint venture manufacturing 12–24kV switchgear since 2001, with Spanish INAEL RMU technology introduced in 2008. Every unit is assembled, tested, and inspected in-house before shipment.

10,000+
سنوات خبرة
20+
دولة تصدير
2001
وحدة شهريا
30
يوم تسليم

From Order to Shipment in 30 Days

A single production flow covers fabrication, assembly, and routine testing — so lead times stay predictable for export orders.

01

Engineering Review

Specs confirmed against IEC 62271; drawings released to the workshop.

02

Fabrication

Enclosures and busbars cut, punched, and powder-coated in-house.

03

Assembly

Breakers, switches, and RMU tanks assembled on dedicated lines.

04

Routine Testing

Power-frequency withstand, resistance, and mechanical operation tests on every unit.

05

Packing & Shipment

Export packing with inspection report; standard 30-day lead time.

Quality Testing Equipment

Every switchgear unit passes routine tests per IEC 62271 before leaving the factory.

Power-Frequency Voltage Withstand Tester
Power-Frequency Voltage Withstand Tester
Switch Characteristic Tester
Switch Characteristic Tester
CT/PT Transformer Tester
CT/PT Transformer Tester
Contact Resistance Tester
Contact Resistance Tester
SF6 Gas Recovery & Refilling Unit
SF6 Gas Recovery & Refilling Unit
Debugging & Commissioning Platform
Debugging & Commissioning Platform
Industrial Drying Oven
Industrial Drying Oven
Ventilation Test Bench
Ventilation Test Bench

Certified for Global Markets

Our quality and environmental management systems are audited annually, and product lines carry the certifications international buyers require for tenders and customs clearance.

Request certificate copies
ISO 9001
Quality management
ISO 14001
Environmental management
CE
European conformity
CCC
China compulsory
PCCC
Philippine certification
IEC 62271
Switchgear standard

Factory Milestones

2001

Founded as a Sino-Korean joint venture

Ningbo Nature ShinSung Automation Co., Ltd. established in Cixi, Zhejiang, focused on medium voltage switchgear.

2008

INAEL RMU technology introduced

Licensed SF6 ring main unit technology from INAEL (Spain), adding fully sealed RMU lines to production.

2015

Capacity expanded to 10,000 units/year

New assembly workshop and routine test stations brought annual outdoor switch capacity to 10,000 units.

2020

Exports reach 20+ countries

CE and PCCC certifications opened European, Middle Eastern, and Southeast Asian markets.

Today

120 employees, 30-day lead time

Full in-house fabrication, assembly, and IEC 62271 routine testing with a standard 30-day export lead time.

Ready to source from our factory?

Send us your project specs — we reply within 24 hours with a quote and lead time.