A. 25 years experience of production Medium voltage circuit breaker material
B. 18 years for overseas market; you no worry for communication and save time
C. IEC CNAS standard testing lab inside own property factory industrial zone
D. Big Brand trusted material supplier, you no worry for quality control
E. Quality control 3 times 100% inspection testing from raw material, to operating mechanism, to finished Vacuum Circuit Breaker.

1 of the best Medium Voltage material for power transmission and distribution private company in China

JLIAMIGO was joint venture and stand for JULI and SINOAMIGO;

Zhejiang JULI Electric Co., Ltd., start since 2000 focus on Operating mechanism, Vacuum Circuit Breaker and its recloser. So far employees more than 300, annually turn over 30 million USD, and local Medium Voltage Vacuum Circuit Breaker manufacturers 50% material by JULI in Wenzhou China;

With Big Brand, the same core material spring motor drive (operating mechanism), for your medium voltage circuit breaker and GIS switchgear;

SINOAMIGO Power T&D Co., Ltd. was initial founded in 2010, professional manufacturer for medium voltage switchgear panel, switchboard with JULI VCB etc brand Vacuum Circuit Breaker mounted.

In order to better dealing overseas EPC projects, by joint venture company: JLIAMIGO Electric Power (Yueqing) Co., Ltd.

Quality control: 3 times 100% inspection testing
(from raw material, to operating mechanism, to finished Vacuum Circuit Breaker)

1. Raw Material Inspection of Vacuum Circuit Breaker (VCB)


2. Production Line of Vacuum Circuit Breaker (VCB)

3. Production Line and Testing of Operating Mechanism (VCB key parts)

4. Test equipment as IEC standard for Vacuum Circuit Breaker (VCB)

Power frequency testing: 100% according to IEC standards;
Big current testing temperature rising equipment: provide up to 3000A;
Partial discharge testing room: provides two different size for vacuum circuit breaker and GIS switchgear panel;
Lightning withstand voltage testing equipment: were same as the CNAS authoritative third-party testing laboratory, which can provide a maximum of 300kV type test lightning voltage;


5. Warehouse for Vacuum Circuit Breaker (VCB) and its Operating Mechanism
Following 6S Management, always keep neat and clearn.


6. Exhibition and After-sales Service


7. Our Team

7. Certification and Test Report

ZW7-40.5 Outdoor Vacuum Circuit Breaker

ZW7-40.5 outdoor vacuum circuit breaker is outdoor high voltage appliance equipment with three phase AC 50Hz and rated voltage of 40.5 kV.The spring operating mechanism or the electromagnetic operating mechanism is additionally installed, remote electrical opening and closing can be realized, and manual opening and closing can be realized by storing energy manually on site. The design performances conform to the requirements of the national standard of GB1984-89 AC High Voltage Circuit Breaker, and it also meets the requirements of the IEC standard of IEC62271-100 AC High Voltage Circuit Breaker. The ZW7-40.5 outdoor vacuum circuit breaker is mainly applied to control and protection of the outdoor 40.5kV transmission and transformation system, and it is also suitable for normal operation and short-circuit protection in urban and rural distribution networks as well as industrial and mining enterprises. The overall structure of the product is of a porcelain bottle strut type; and the vacuum arc-extinguishing chamber is arranged in the upper porcelain bottle, and the lower porcelain bottle is a strut porcelain bottle. The product is applied to places with frequent operations, and it has the characteristics of excellent sealing performance, aging resistance, high-voltage durability, no combustion, no explosion, long service life, convenience in installation and maintenance and the like.

The three phase porcelain bottles are arranged on one structure case, and the arc-extinguishing dynamic end is connected with the output shaft of the spring mechanism through a connecting lever and an insulation pull rod. The spring mechanism and the joining beam linked with the circuit breaker are arranged in a waterproof mechanism case. The product mainly consists of the vacuum arc-extinguishing chamber, the current transformer, the transmission mechanism and the spring operation mechanism.