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ZW38-63(55)/T1250-1600/25-31.5 Outdoor Two Pole Vacuum Circuit Breaker

The ZW38-63(55)/T1250-1600/25-31.5 outdoor two pole vacuum circuit breaker is a single-phase high voltage switching device which adopts the vacuum interrupter as the arc-quenching component. The rated voltage and frequency of this single phase circuit breaker are AC 55KV and 50Hz respectively.

This two pole vacuum circuit breaker adopts a spring energy storage type cam linkage mechanism. The energy storage as well as opening and closing operations can be conducted manually or electrically. DC electric operation can be carried out locally or remotely.

Our outdoor two pole vacuum circuit breaker features simple structure, strong breaking capacity, complete operating functions, and no risk of explosion. It is specially designed for opening and closing loads as well as breaking fault current in the AT traction power supply system for electrified railway.

Normal Conditions of Use
1. Altitude: ≤1,000m
2. Ambient Air Temperature: upper limit +40℃; lower limit -30℃ (ordinary areas), -40℃ (high and cold areas)
3. Wind Pressure: ≤700Pa (i.e. wind speed ≤34m/s)
4. Ice Thickness: ≤10mm
5. Air Pollution Class: IV
6. Earthquake Intensity: ≤8degree, There is no recurrent severe shaking, or seismic isolation measures should be taken.
7. The ambient air should not be seriously polluted by corrosive or flammable gases, water vapor, etc.

Note: If the outdoor two pole vacuum circuit breaker needs to be used in places dissatisfying the above conditions, customers should consult with our company.

Technical Parameters
No. Item Unit Value
1 Rated Voltage KV 55
2 Max. Voltage KV 63
3 Rated Lightning Impulse Withstand Voltage (Peak) KV 325
4 1min Power Frequency Withstand Voltage KV 140
5 Rated Frequency Hz 50
6 Rated Operating Current A 1250/1600
7 Rated Short-circuit Breaking Current KA 25/31.5
8 Rated Peak Withstand Current KA 63/80
9 Rated Short-circuit Closing Current KA 63/80
10 Rated Short-time Withstand Current KA 25(4s)/31.5(4s)
11 First-Pole-to-Clear Factor 1.5
12 Rise Rate of Recovery Voltage KV/μs 0.75
13 Times of Breaking the Rated Short-circuit Current times 20
14 Rated transient recovery voltage peak KV 124
15 Closing Time ms 110±10
16 Opening Time ms 50±10
17 Closing Speed m/s 1.3±0.5
18 Opening Speed m/s 3.0±0.3
19 Energy Storage Time of the Motor s <20
20 Motor Voltage V DC 110/220
21 Motor Power W 400
22 Supply Current of the Motor A 9/5±2
23 Voltage of the Opening and Closing Coils V DC 110/220
24 Current of the Opening and Closing Coils A 4/2.5
25 Rated Pressure of SF6 Gas Mpa 0.1 (20 ℃)
26 Annual Gas Leak Rate <1%
27 Standard Operating Sequence O-0.3s-CO-180s-CO
28 Resistance of the Main Circuit μΩ <80
29 Total Weight kg 2100
30 Mechanical Life times 10000

We are a professional outdoor two pole vacuum circuit breaker manufacturer and supplier in China. We offer a wide range of products, including indoor vacuum circuit breaker for generator, low voltage switchgear, withdrawable switchgear, and more.

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