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    ZN85 Vacuum Circuit Breakers ZN85 Vacuum Circuit Breakers ZN85 Vacuum Circuit Breakers ZN85 Vacuum Circuit Breakers ZN85 Vacuum Circuit Breakers
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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





























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