Nale Electric is willing to work together with domestic and foreign merchants to create brilliance!
| Quantity: | |
Product Overview
In national utility grids and mega-scale industrial complexes, stepping power down from transmission lines requires flawless Medium Voltage (MV) isolation. A short circuit at 12,000 Volts (12kV) creates a catastrophic plasma explosion that standard air-breakers cannot contain. The CHNAILE 12kV Drawout Vacuum Circuit Breaker (VCB) relies on the supreme insulating properties of a pure vacuum. By pulling the high-voltage contacts apart inside a vacuum-sealed glass and ceramic envelope, the resulting arc is starved of ionized gas and extinguished at the very first current zero-crossing. Engineered as a motorized, drawout handcart module, this VCB seamlessly integrates into modern metal-clad switchgear, providing EPC contractors with the ultimate fail-safe solution for high-voltage commercial and heavy industrial distribution.
Technical Parameters
| Device Category: | Indoor High/Medium Voltage Vacuum Circuit Breaker (VCB) |
| Poles Configuration: | 3P (Encased in Epoxy Resin Insulating Cylinders) |
| Rated System Voltage: | 10kV / Rated Maximum Voltage: 12kV (AC 50Hz) |
| Arc Quenching Medium: | Hermetically Sealed Vacuum Interrupters |
| Operation Mechanism: | Spring Energy Storage (Motor-charged with manual override) |
| Installation Architecture: | Central Drawout Handcart Type (Trolley) |
| Switchgear Compatibility: | Designed for KYN28A-12 (GZS1) and XGN fixed cabinets |
| Control Features: | Push-to-Close / Push-to-Trip mechanical buttons, operations counter |
| Standard Compliance: | GB/T 1984, GB/T 11022, IEC High-Voltage Standards |
1. Elite Vacuum Plasma Extinction
Hermetic Vacuum Interrupters: At 12kV, air becomes a conductor. The core of this breaker lies in its three vacuum bottles. Because there are no gas molecules to ionize, the dielectric strength recovers instantly after the contacts separate. This guarantees that massive medium-voltage fault arcs are vaporized in a fraction of a millisecond, preventing devastating switchgear fires.
Epoxy Resin Insulation Poles: The vacuum interrupters are securely embedded within distinctive red cast-epoxy resin cylinders. This robust "embedded pole" technology repels dust, extreme moisture, and industrial corrosive gases, virtually eliminating the risk of phase-to-phase flashovers in heavily polluted mining or maritime environments.
Spring-Charged Kinetic Drive: Closing high-voltage contacts requires violent, instantaneous force to prevent pre-arcing and contact welding. The heavy-duty spring mechanism—automatically charged by an internal motor or manually via a lever—ensures the contacts slam shut and tear open with uncompromising, uniform speed regardless of the operator's physical force.
2. Drawout Handcart (Trolley) Architecture
Rapid Switchgear Integration: Designed specifically as the beating heart of KYN28A-12 metal-clad switchgear. The breaker is mounted on an industrial-grade wheeled chassis (handcart).
Safe Physical Isolation (Racking): Servicing a live 12kV cabinet is highly lethal. The drawout mechanism allows technicians to mechanically "rack" the VCB from the 'Connected' position to a physically separated 'Test/Isolated' position while the heavy steel cabinet doors remain safely closed. This provides absolute visual and physical galvanic isolation for maintenance crews.
3. Target Application Scenarios
Because of its extreme 12kV rating and vacuum arc suppression, this VCB is exclusively sourced by high-voltage panel builders and national utility providers for:
Municipal Grid Substations: Serving as the primary medium-voltage incomer and feeder switches in regional step-down transformer substations.
Heavy Mining & Metallurgy: Providing blast-proof, highly insulated 10kV power distribution to massive subterranean boring machines, hoists, and electric arc furnaces.
Power Generation Plants: Acting as the critical medium-voltage switchgear protecting the output lines of hydroelectric and thermal power generators.
Industrial Manufacturing Hubs: The mandatory primary receiving switchgear for sprawling automotive gigafactories and petrochemical refineries pulling power directly from the national grid.
4. Global B2B Partnership with CHNAILE Factory
Factory-Direct Medium-Voltage Supply: Bypassing international traders allows us to offer aggressive, factory-floor pricing on these capital-intensive VCB units, significantly optimizing the BOM for your medium-voltage switchgear production lines.
Exhaustive High-Voltage Verification: We do not gamble with 12,000 Volts. Every single VCB undergoes rigorous vacuum integrity testing (X-ray inspection), mechanical endurance cycling, and simulated high-voltage impulse blasts to guarantee absolute IEC compliance before global export.
OEM Solutions for Panel Builders: We actively partner with global MV switchboard manufacturers, providing customized control voltages, specialized interlocking mechanisms, and bespoke branding to elevate your KYN28A-12 cabinet offerings.
