[Product Name]: ZN28A-12 Vacuum Circuit Breaker

【 Detailed Content 】: ◆ Overview The ZN28A-12 series indoor high-voltage vacuum circuit breaker (ZN28-12 integrated indoor high-voltage vacuum circuit breaker) is a three-phase AC 50Hz, rated voltage 12kV indoor high-voltage switchgear mainly used in fixed switchgear or to replace low oil circuit breakers in old-fashioned switchgear. It can also be installed in the protection and control components of movable switchgear and is suitable for frequent operation in places. The product complies with the requirements of GB1984 "AC High Voltage Circuit Breakers", JB3855 "3.6-40.5kV Indoor AC High Voltage Vacuum Circuit Breakers", and DL/T403 "Technical Conditions for Ordering 12-40.5kV Indoor High Voltage Vacuum Circuit Breakers". ◆ Environmental conditions for use . Environmental temperature: -10 ℃ to+40 ℃ (storage and transportation allowed at -30 ℃); . Relative humidity: daily average not exceeding 95%; Monthly average not exceeding 90%; The daily average saturated vapor pressure shall not exceed 2.2kPa; . Altitude: not exceeding 2000m (2500 is the highest prototype); The monthly average saturated vapor pressure shall not exceed 1.8kPa; . Seismic intensity: not exceeding 8 degrees; . A place without fire, explosion hazard, serious pollution, chemical corrosion, and severe vibration.