33kV Indoor Vacuum Circuit Breaker

33kV 40.5kV

1250A  1600A  2000A  2500A



CA-ZN85-33 series vacuum circuit breaker is a new type of three-phase 50Hz according to the unique design concept and combined with the market demand and development, the rated voltage of indoor switchgear 33-40.5kV, it can be provided to industrial and mining enterprises, powerplant and substation as the control and protection of electrical equipment,and is suitable for frequent operation.




ZN85-33 Vacuum circuit-breakers have particular advantages for use in networks where there is a high switching frequency in the working current range and/ or where a certain number of short- circuit breaking operations are expected. CA-ZN85-40.5 vacuum circuit- breakers are suitable for auto reclosing and have exceptionally high operating reliability and long life. The circuit- breakers are notable for their compact design, small dimensions together with high capacity. The operating mechanisms have a low maintenance requirement and the interrupters are maintenance- free throughout their service lives. They are well suited to all load breaking operations which occur in practice, and in particular:


◇ Short-circuit currents;
 Overhead lines under load and, no-load conditions;
 Cables under load and no-load conditions;
 Transformers under load and no-load conditions;
 Generators under load and no-load conditions;
 Ripple control system;
  Capacitor banks(also parallel switching) and Motors with starting currents above 600A;

Fields of application

 Cable control and protection

 Overhead control and protection

 Transformers and distribution substations

 Motor and transformer control and protection

 Generator control and protection

 Capacitor bank control and protection

Environmental Conditions

Ambient Conditions:

1.Ambient air temperature : Upper limit: +40°C, lower limit: -25°C.

2.Altitude : 1000m above sea level and below.

3.Relative humidity : Monthly average not greater than 90%, daily average not greater than 95%.

4.The surrounding air should be free from obvious pollution such as corrosive or combustible gases and water vapour bodies.

5.No regular strenuous movement.

6.Fouling resistance class: Class II.



Technical Parameters

Item Unit Parameter
Rated voltage kV 33
Rated current A 1250 1600 2000, 2500
Rated short-circuit breaking current kA 25/31.5 25 31.5
Rated dynamic current (peak) kA 63/80 63 80
Thermal current(4s) kA 25/31.5 25 31.5
Rated short-circuit making current(peak) kA 63/80 63 80
Rated operating sequence   〇—0.3s—CO— 180s—00
Power frequency withstand voltage(1min) kV 95
Rated lightning impulse withstand voltage(peak) 185
Mechanical endurance Times 10000


Q: Could I have prices of your products? 

A: Welcome. Please feel free to send us an inquiry here. We will reply you within 24 hours.

Q: Can I get a sample before the bulk order? 

A: Yes, we welcome sample order to test and check quality.Mixed samples are acceptable. 


Q: Can we print our logo/ company name on products? 

A: Yes, of course, we accept OEM, then need you to provide brand authorization to us 


Q:Do you accept product customization? 

A:Yes, of course, please provide specific drawings or parameters, we will quote you after evaluation 


Q: What is the lead time?  

A: The lead time depends on the quantities ordered, generally within 7-20 days after receiving the payment.  


Q: What is your Trade Terms?  

A: We accept EXW, FOB, CIF, FCA, etc.  


Q: What is your payment method?   

A: We accept T/T,  irrevocable L/C at sight, etc  


Q: Do you inspect the finished products? 

A: Yes, each step of production and finished products will be came out inspection by QC department before shipping. And we will provide goods inspection reports for your reference before shipment 


Q: How to solve the quality problems after sales?  A: Take photos of the quality problems and send to us for our checking and confirming, we will make a satisfied solution for you within 3 days.