1.     3 incoming + 1 outgoing :

It is used to feed the house with the electrical current from three lines (sources). All are single phase.

- The 1st come from the national network (NN),

- The 2nd come from the local area generator (SC),

- The 3^rd come from the house generator (HG).

2.     The priority :

The priority in supplying to the house (load) is as follows:

No.1  to the national electrical network (NN), if it exists, even if the other two sources are also exist.

No. 2  to the local area generator (SC ) , when (NN) doesn’t exist, and even if (HG) exists.

No. 3  to the house generator (HG), when both (NN) & (SC) don’t exist.

- NN     operated by the government, to supply the city zones, each for a limited time in the day.

- SC     operated by the private companies to supply the zones of the city with the electricity, also for a limited time in the day.

- HG     operated by the owner of the house (citizen) , at the time when both  (NN) & (AG ) don’t exist.

3 - Consists of :

A - power relays, 

B - metallic box, 

C - connectors,

D - indication lamps (or LED) ,

E - additional auxiliary contacts ( 1 NO + 1 NC ) , to stop the generator of the house.

4 - The rated current : 60 A

5 - The coils voltages : 220 Vac 

• Wooden Box
• Customized is acceptable

• Sample:   Transfer swtich sample making is available before mass-manufacture.
• Delivery:   20-30 days after receipt the deposit.
• Factory Visit& Inspection: Welcome customer or your agent to visit our factory before order and loading.

Tianjin Yanxiang Electronic Science and Technology Co., Ltd., registered in Tianjin Binhai Hi-Tech industrial Zone. It is a high-tech company with technology R&D and service combination as well as information and industry. Meanwhile it is a High State Authenticated and New Technology Enterprise , Excellent Private Enterprise of Tianjin. The company passed the ISO9001 International Quality System Certification in 2004 January. We have acquired multiple software copyrights and invention patents. Several product technologies are listed as National Key and New Product Project , Tianjin Science and Technology Support Plan Project.

We own 20 national patents,including 5 inventions patent , other 5 techniques obtained Tianjin Science and technology achievement. Our company is granted as Tianjin Outstanding Privately Owned Enterprise .Besides, we got Chinese Privately Owned Science and Technology Enterprise Technology Innovation Award.

The company focus on the telecommunications cabinets, battery cabinets and communication engineering heat exchanger production and sales, from 2006 we begin to supply products to Huawei technology company, at present, out main customers including China Mobile, China Unicom, Huawei Technology Company and Naval Communications Department. Foreign customers from Europe, Asia, Africa, South Asia and North America and other countries speak highly of our products.

In the future, Yanxiang will stick to the aim of providing good quality products, excellent service, advanced management and pioneering technology, It will be our honor to provide clients with quality electronic science and technology products .We will reward the support from cooperative companies and concern of social circles with more excellent achievements.

Q1.What’s your Product Range?

• Data Communication
• IT & Network System
• Data Management
• Defence /Government
• Power Supply and Management
• Telecommunications
• Fiber & Cable Management
• Power, Oil and Gas
• Engineer and Constructions
• Energy such as solar energy, wind energy, energy saving

Q2.Do you inspect the finished products?

-Yes.Each step of production and finished will be inspected strictly by QC Department before shipping.

Q3.Are you a manufacturer?

-Yes.With 13 years experience with combined R&D, produce and sale together,we believe we are the best supplier.