With the rated voltage of 40.5kV, the ZW18A-40.5/T1250-2500/25-31.5 outdoor vacuum circuit breaker is a three-phase AC 50Hz high voltage product. It can be used as the control or protection switch in substations, power planets, as well as industrial and mining enterprises, particularly suitable for occasions requiring frequent operations.
Characteristics of the outdoor vacuum circuit breaker
1. This product is composed of vacuum interrupter, current transformer, transmission and spring actuating mechanism.
2. Its external insulator is filled with vacuum grease for ease of inspection and maintenance.
3. Max. rated current: 2500A, Rated short-circuit breaking current: 31.5kA, Rated making current: 80kA
4. Rated short-circuit current breaking capacity: 30 times
5. Machine service life: 10000 times
1. Altitude: ≤2,000m
2. Ambient Temperature: -40℃~+40℃
3. Wind Pressure: ≤700Pa (wind speed ≤34m/s)
4. Earthquake Intensity: ≤8degree
5. Degree of Air Contamination: Grade IV
Note: Vacuum circuit breakers applicable to places with the altitude higher than 2,000m can also be provided, but customers should mention this when ordering.Technical Parameters
|Rated Insulation Level||1min Power Frequency Withstand Voltage (phase to ground external insulation)||kV||95|
|Lightning Impulse Withstand Voltage (Peak Value)||185|
|Rated Short-circuit Breaking Current||kA||25||31.5|
|Rated Operating Sequence||O-0.3s-CO-180s-CO|
|Rated Short-circuit Current Breaking Times||times||20|
|Rated Short-circuit Closing Current (Peak Value)||kA||63||80|
|Rated Peak Withstand Current||kA||63||80|
|Rated Short-time Withstand Current||kA||25||31.5|
|Rated Short Circuit Duration||s||4|
|Rated Operating Voltage||V||AC, DC 220V/110V|
| Rated Operating Current
|Permissible Wearing Thickness of the Moving contact and Fixed Contact||mm||3|
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