1.overview
The ZW32-12 Three-Phase Pole-Mounted Integrated Primary and Secondary Circuit Breaker features a vacuum arc-extinguishing design for the switch body and uses organic materials for external insulation. The current and voltage sampling is conducted using an integrated current and voltage sensor or an integrated solid-sealed pole. It is designed to be compatible with our independently developed CFT series Distribution Automation Feeder Terminal Units (FTU), forming a complete set of integrated primary and secondary pole-mounted circuit breaker equipment. This setup enables measurement, control, protection, and communication functions.
This product is widely used in the distribution systems of urban grids, rural grids, substations, and industrial enterprises, primarily for switching load currents, overload currents, and short-circuit currents.
2.Technical Specifications
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Parameter Category |
Parameter Index |
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Rated Voltage |
12 kV |
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Rated Insulation Level |
1 min rated power frequency withstand voltage |
Wet test |
Phase to phase,phase-to-ground: 30 kV; Breaker: 34 kV |
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Dry test |
Phase to phase, phase-to-ground: 42 kV; Breaker: 48 kV |
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Rated Lightning Impulse Withstand Voltage (Peak) |
Phase-to-ground |
75 kV |
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Breaker |
85 kV |
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Rated Current |
630 A |
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Rated Short-Circuit Breaking Current |
20 kA、25 kA |
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Rated Short-Circuit Closing Current (Peak) |
50 kA、63 kA |
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Rated Dynamic Stability Current (Peak) |
50 kA、63 kA |
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Rated Thermal Stability Current (RMS Value) |
20 kA、25 kA |
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Rated Short-Circuit Breaking Current Times |
30times |
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Rated Thermal Stability Time |
4s |
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Rated Operation Sequence |
O－0.3s－CO－180s－CO |
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Mechanical Life |
10000times |
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Allowable Thickness of Contact Wear |
3 mm |
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Weight |
115 kg |
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3.Operating Environment
1.Ambient Temperature: Minimum Temperature: -50°C, Maximum Temperature: +70°C, Maximum Daily Temperature Difference: 25°C
2.Ambient Humidity: Daily Average Relative Humidity:≤95%, Monthly Average Relative Humidity:≤90%
3.Altitude:≤2000 m (Custom design required for altitudes greater than 2000 m)
4.Pollution Level: Level IV
5.Operating Environment: Outdoor, in locations without flammable or explosive hazards, chemical corrosion, or frequent severe vibrations.