ZN28G/ZN28A-12 Series Side Mounted Indoor High Voltage Vacuum Circuit Breaker
Technical specification
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Item |
Units |
Parameters |
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Rated voltage |
KV |
12 |
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Rated current |
A |
630-3150 |
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Rated short-circuit breaking current |
KA |
20 |
31.5 |
40 |
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Rated short-circuit closing current |
KA |
50 |
80 |
100 |
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Rated dynamic steady electric current(peak) |
KA |
50 |
80 |
100 |
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Rated thermal stability current(RMS) |
KA |
20 |
31.5 |
40 |
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Rated thermal stability time |
S |
4 |
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The breaking times of rated short circuit breaking current |
Times |
30(50) |
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Open time of CD10 electromagnetic operating mechanism |
mS |
<80 |
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Rated operating sequence |
|
O-0.3s-CO-180s-CO |
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A minute power frequency withstand voItage(RMS) |
KV |
The phase 42, section 48 |
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Lightning shock pressure |
KV |
The phase 75, section 85 |
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Mechanical life |
Times |
10000 |
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Note: 20KA,31.5KA t=0.3s t1=180s 40KA t=180s t1=180s. |
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Product Model
Dimension
Product Functions
◆Circuit Control & Protection: Provides reliable control and protection for electrical facilities in industrial and power generation environments.
◆Frequent Operation Handling: Engineered for applications requiring frequent switching cycles without performance degradation.
◆Fault Current Interruption: Safely interrupts fault currents using advanced vacuum interruption technology.
◆Load Switching: Makes and breaks load currents under normal operating conditions with minimal contact wear.
Applicable Environment
◇Rated System: Suitable for 12kV, 50Hz three-phase AC indoor power systems.
◇Temperature Range: Operates at ambient temperatures up to +40℃ (storage down to -30℃ permitted).
◇Installation Altitude: Designed for elevations up to 1000 meters.
◇Humidity Tolerance: Withstands daily average humidity ≤95% and monthly average ≤90%.
◇Seismic Resistance: Capable of withstanding earthquake intensity up to 8 degrees.
◇Air Quality: Suitable for locations free from corrosive gases, flammable vapors, and significant pollution.
Product Highlights
◆Side Mounted Versatility: Unique side mounting configuration offers flexible installation options for various switchgear layouts and space constraints.
◆Multiple Operating Mechanism Choices: Available with CT17 spring mechanism, CT19 spring mechanism, or CD17 electromagnetic mechanism, allowing customization to specific application requirements and preferences.
◆Vacuum Interruption Technology: Employs proven vacuum arc-quenching technology for clean, maintenance-free operation with long electrical life and minimal environmental impact.
◆Frequent Operation Capability: Specifically designed for applications requiring frequent switching, such as capacitor banks, arc furnaces, and motor control centers.
◆Industrial-Grade Protection: Ideal for demanding environments including industrial plants, power plants, and substations where reliable circuit protection is critical.
◆Comprehensive Application Range: Suitable for a wide variety of electrical facilities requiring robust control and protection in medium voltage distribution systems.