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ZW18A-40.5/T1250-2500/25-31.5 Outdoor Vacuum Circuit Breaker

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

Use Environment
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
Item Unit Value
Rated Voltage kV 40.5
Rated Frequency Hz 50
Rated Insulation Level 1min Power Frequency Withstand Voltage (phase to ground external insulation) kV 95
Lightning Impulse Withstand Voltage (Peak Value) 185
Rated Current A 1250 1600
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
Mechanical Life times 10000
Rated Operating Voltage V AC, DC 220V/110V
Rated Operating Current
Close, Open
A 5, 2.5
Permissible Wearing Thickness of the Moving contact and Fixed Contact mm 3
Weight kg About 1200

We are a professional outdoor vacuum circuit breaker manufacturer and supplier in China. We also provide low voltage circuit breaker for ship, air circuit breaker, withdrawable switchgear, and more.

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