Product Details

ZN85 Vacuum Circuit Breakers

ZN85 indoor high-voltage alternating-current vacuum circuit breaker has a frequency of 50Hz and a rated voltage of 40.5kV. It applies to the electrical equipment control and protection in industrial and mining enterprises, power plants and substations, particularly to the places needing frequent operation. It can be fixed in a switch cabinet or installed on a handcart. With stable performance and convenient installation, it is the best choice for the control and protection of high-voltage power transmission and distribution systems.

Normal operating conditions

● Ambient temperature: - 40℃~+40℃ (below 35°C within 24 hours)

● Relative humidity: ≤95% (daily average) or ≤90% (monthly average)

● Altitude: ≤ 1000m

Item	Unit	Data
Rated voltage	kV	36(40.5)
Rated insulation level 1 min power frequency withstand voltage (effective)	kV	95
Rated insulation level lightning impulse withstand voltage (peak)	kV	185
Rated frequency	Hz	50
Rated current	A	1250, 1600, 2000
4s rated short time withstand current	kA	25, 31.5
Rated peak withstand current	kA	63, 80
Rated short circuit breaking current	kA	25, 31.5
Rated short circuit making current	kA	63, 80
Rated operation sequence		O-0.3s-CO-180s-CO
Breaking times of rated short circuit breaking current	times	20
Rated capacitor bank breaking current	A	630
Mechanical life	times	10000