1.1 ZN12-12 and ZN12-40.5 high-voltage vacuum circuit breakers are indoor high-voltage switchgear with rated voltages of 12KV and 40.5KV, three-phase AC 50Hz, respectively. They are integrated vacuum circuit breakers manufactured with advanced foreign technology.

The operating mechanism of ZN12-12 (40.5) high-voltage vacuum circuit breaker is spring energy storage type, which can be operated by AC or DC. It can also be manually operated.

1.2 This circuit breaker has a simple structure. Strong breaking ability, long service life, complete operating functions, no explosion hazard, easy maintenance, suitable for control or protection switches in power plants, substations and other transmission and distribution systems, especially suitable for breaking important loads and places with frequent operations.

1.3 Environmental conditions for use:

Altitude: Below 1000m (if the altitude exceeds 1000m, follow the relevant provisions of DL/T593-1996 "Technical Guidelines for Shared Ordering of High Voltage Switchgear").
Environmental temperature: maximum+40 ℃, minimum -25 ℃
Environmental humidity: daily average not exceeding 95%, monthly average not exceeding 90%
Seismic intensity: below 8 degrees

1.4 Outline drawing: Refer to Figure 1 and Figure 2.
Figure 1 Outline drawing of ZN12-12

Figure 2 Outline drawing of ZN12-40.5

2.1 Implementation standards: GB1984-89 "AC High Voltage Circuit Breakers", JB3855-85 "General Technical Conditions for 10kV Indoor High Voltage Vacuum Circuit Breakers", ZBK43004-89 "General Technical Conditions for 35kV Indoor High Voltage Vacuum Circuit Breakers".

2.2 ZN12-12 (40.5) High Voltage Vacuum Circuit Breaker Model Meaning


A place without fire or explosion hazards, corrosive gases, and severe vibrations.