Vacuum Circuit Breaker (ZN85-40.5 3AV3)

ZN85-40.5(3AV3) Indoor AC medium voltage vacuum circuit-breaker (hereinafter called "circuit-break" ) serves in the industrial

& mineral enterprise and power plant and substation to protect

And control equipment in the three-phase AC power system for

Rated voltage of 35kV and rated frequency of 50Hz. It can also

Perform in the occasions featuring frequent operation. The circuit-breaker conforms to the specifications of the national standards of GB1984 Alternate current high-voltage circuit breaker and JB3855 Indoor alternate current high-voltage vacuum circuit breaker for rated voltage from 3.6kV to 40.5kV.

Normal service conditions:

1. Ambient temperature: -25C~+40C (daily average temperature is 35C and below)

2. Relative humidity:

Daily average value is not more than 95%;

Monthly average value is not more than 90%;

Daily average value of saturated water vapor pres-sure is not more than 2.2kPa; Monthly average value of saturated water vapor pres-sure is not more than 1.8kPa

3. Altitude: 1000m and below

4. No pollution from dust, smoke, corrosive and/or flammable gas, vapor or salt and fog; No severe vibration.

5. Amplitude of electromagnetic inductive interference from auxiliary circuit: No more than 1.6kV

Structure features:

1. The adoption of integrated and modular design leaves circuit-breaker simple and logical in overall structure. The arrangement features arc-extinguishing chamber up and interlocking device and operating unit down. The in dependent power operating device

With special spring is not subject to regulation and has highlights for stable and reliable operation.

2. The vacuum arc-extinguishing chamber of three-phase circuit is located in enclosed cast eposy resin insulated cylinder that can markedly lift the phase-to-phase insulation performance, be immune to the affection from bad ambient environment, prevent dust and foreign matter from entry to maincircuit and reduce the overall dimension of circuit-breaker.

3. The circuit-breaker adopts WL-35855 vacuum arc-extinguishing chamber made by U. S Culter-Hammer company or latest domestic-designed coil-type axial arc-extinguishing chamber featuring strong magnetic field. The vacuum arc-extinguishing chamber, adopting porcelain enclosure and copper-chromium contact, features small overall dimension, high insulation level and strong arc-extinguishing capacity, long electrical endurance and excellent property to make and break short-circuit current.

Trademark: CHHG

Model:ZN85-40.5 3AV3