7.2KV 10KV 13.8KV Medium Voltage Vacuum Contactor

      BRCKG3/4-7.2 AC vacuum contactors (hereinafter referred to as: contactor) are applied in power network with AC frequency of 50Hz-60Hz, rated voltage of 7.2kV, and rated current below 630A in the main loop for the remote making and breaking, frequent start and control of AC motor. It is advisable to use them in combination with fuse and protective device to replace vacuum circuit breaker.

• Ambient air temperature is neither higher than +40℃ nor lower than -10℃;


• Altitude of installation site does not exceed 1000m;


• The maximum mean monthly relative air humidity is 90% in the wettest month. The minimum mean monthly temperature is 25℃, with consideration of condensation generated on the surface of product due to temperature change.


• The operating condition shall be free from obvious impact and vibration;


• The medium is without explosion danger, and in the medium there is no gas and dust (including conductive dust) sufficient for corroding metal and destroying insulator.


• The operating condition shall be free from rain and snow

Composition of model No. and meanings:

For product specifications, rated voltages are 7.2kV, the rated current is below 630A. Control voltages include 220V, 380V.

•  Overall and installation dimensions (See Fig.1,2)


•  See Table 1 for main technical features;


• Number of pole of main loop is 3;


• Control power supply: 220V, 380V and 50Hz/60Hz, and also customized according to user needs;


• Control loop is DC electromagnet. Coils are connected with AC control power supply via power module. Schematic diagram and wiring diagram (See Fig3);


• Rated duty: discontinuous long-time duty and repeated short-time duty (rated on-load factor is 40%);  The auxiliary contact is three normally open and normally closed two, vheating current is 5A

“BOERSTN ELECTRIC" is engaged in manufacturing,development,service ,solution,maintenance & marketing of H.V./L.V. power distribution equipments,switchgears,transformers,substations..etc .for all over the world. As a leading & professional manufacturer in China,we mainly manufacture below items and supply their electrical accessories:

• H.V.& L.V.switchgears


• Power Distribution Board (PDB)


• M.V solid insulated switchgears (SIS)


• compact substations /Package substation/kiosk substation


• single phase & three phase pad mounted transformers(PMT)


• Gas insulated switchgears(GIS)


• Cable Brach box 


• Blokset Switchboards/switchgears


• Automatic feeder Voltage Regulator 


• Ring main units (RMU)


• Oil-immersed transformers and dry type transformers 

1. Are you the manufacturer or trader?

Boerstn is a leading & professional manufacturer located in Zhejiang province of China.

2. What is your main markets?

Our main market is in home & a half in South-East Asia, Middle East,West-Africa, East-European countries & Some South America..etc

3. What is your delivery & after-sales serive?

The delivery is according to order qty, normally for containers order we need 1 month. Per each month 20 containers (20'ft or 40'ft)are no problem for us . We can answer user's question and solve their problem in 24 hrs per each day and give full technical support in time to all of our products.

4. What is your product warranty?

Firstly we have quality certificates like CCC, ISO9001..etc for our switchgears & power equipments ,have CE,Rohs,CB,TUV,Kema..for their electrical parts and accessories. Secondly we supply 1 year quality guarantee,during this period we supply free repair,maintenance and technical support.Certainly for some of switchgears and power equipments, their using life is over 20 years,no problem.

5.Do you accept OEM and ODM?

Yes.  Our R & D team owns latest technology ,can develop & produce products as customers' drawing & under their brand

6. What is your payment terms?

  a. 30% T/T in advance as deposit ,balanced against the shipping documents

  b. irrevocable L/C at sight for order which amount is over 100 thousand USD

  C. for old business partner,we can negociate together for other special terms

  d . For samples, we accept T/T,Western union, moneygram, paypal..etc

7. If i want to visit you ,how to do ?

 Our company is located in Yueqing city of Zhejiang province China,which is about 40 minutes by car to Wenzhou air port & 30 minutes from Yueqing train station. About 1 hrs by air from Shanghai international airport and 1 hrs from Ningbo by train. If you need invitation letter before come to China,we can give it to you.