Summary
        ZN85-40.5 high voltage vacuum circuit breaker adopts arc extinguishing chamber with high insulation performance, which can meet the requirements of high altitude area within 3000m. The circuit breaker adopts composite insulation structure to meet the insulation requirements under normal operation conditions. And effectively reduce the size of the circuit breaker, the overall layout is reasonable, beautiful, simple.
        The operating mechanism adopts a specially designed spring operating mechanism, and the output curve is well matched with the requirements of the arc extinguishing chamber. Its performance is more suitable for the characteristics and requirements of 40.5kV vacuum circuit breaker, with high reliability, long service life, convenient maintenance, and maintenance free mechanism. The breaker handcart adopts lead screw nut propulsion device, with overrunning clutch, which can easily move the handcart in the switch cabinet, so the travel range of the handcart is accurate; the matching forced mechanical locking mode meets the functional requirements of "five preventions" of the switch cabinet.
        ZN85-40.5 (3AV3) indoor vacuum circuit breaker is jointly designed and produced by the company and Xi'an High Voltage Apparatus Research Institute. This product is suitable for indoor high-voltage equipment with rated voltage of 40.5kV and three-phase alternating current of 50Hz. It can be used by industrial and mining enterprises, power plants and substations as opening and closing load current, overload current and short-circuit current, and is suitable for frequent operation.

Model and meaning


Environmental conditions for use
Altitude: no more than 2000m;
Ambient temperature: upper limit is + 40 ℃, lower limit is - 15 ℃;
Relative humidity: daily average value is not more than 95%, and monthly average value is not more than 90%;
Seismic intensity: no more than 8 degrees;
There is no risk of fire and explosion, no violent vibration, chemical corrosion, etc.
A place of serious pollution.
If the above environmental conditions are exceeded, please consult with the manufacturer.

Structural features
The circuit breaker adopts the overall layout structure of arc extinguishing chamber on top and mechanism on the bottom, which is convenient for debugging.
Air and organic composite insulation structure, compact design, light weight.
It can be equipped with Cutler hammer vacuum interrupter and ZMD vacuum interrupter made in China. The two kinds of interrupters adopt longitudinal magnetic field, with low current cutoff and good asymmetrical breaking performance.
Simple spring operating mechanism, 10000 times of operation maintenance free.
Lead screw propulsion mechanism, labor-saving, stable, self-locking performance

Main technical parameters


Outline and installation dimension