The KYN18-12 Indoor AC Armoured Removable AC Metal-Enclosed Switchgear is an advanced, high-performance power distribution solution designed for medium-voltage electricity control and protection. Engineered as a centre-mounted vacuum switchgear, it incorporates premium performance characteristics with a versatile drawout design. The system typically integrates the highly reliable ZN22B-12 vacuum circuit breaker as its main vacuum switch, and can also be seamlessly configured with ZN12-10, 3AF, or 3AH vacuum circuit breakers to meet varying project requirements.

Fully compliant with stringent industry standards including GB3906, DL404, and IEC298, the KYN18-12 is purpose-built for 3-10kV AC three-phase 50Hz single-busbar systems. It is widely deployed across modern power generation plants, substations, urban distribution networks, and heavy industrial/mining enterprises for efficient energy acceptance and distribution. Specially engineered for versatile grid layouts, the unit is optimized for non-against-the-wall installation, providing comprehensive rear-access serviceability.

• Centre-Mounted Drawer Design: Removable / withdrawable breaker truck ensures effortless inspection, rapid maintenance, and minimum downtime during circuit breaker swapping.

• Exceptional Interrupting Capability: Delivers heavy-duty short-circuit breaking current ratings up to 50kA, providing robust protection against severe system faults.

• Robust Armoured Compartmentalization: Grounded metal partitions isolate the circuit breaker, main busbars, cables, and instrument panels into distinct, blast-resistant compartments to ensure premium operational safety.

• Flexible Component Integration: Fully compatible with domestic and international vacuum circuit breakers (ZN22B-12, ZN12-10, 3AF, 3AH), allowing custom engineering according to client specifications.

K Y N 18 - 12 / □ - □ - □ - □

• K: Metal-clad Armoured Type

• Y: Removable / Withdrawable Type

• N: Indoor Operation

• 18: Design Code / Sequence Number

• 12: Rated Voltage (kV)

• □: Main Circuit Programme Number

• □: Environmental Characteristics (TH for Humid heat belt; TA for Dry heat belt; Ordinary type without note)

• □: Rated Current (A)

• □: Rated Breaking Current (kA)

• Ambient Air Temperature & Altitude Coordination: * Altitude ≤ 1000m: Ambient temperature up to +40°C.

  • Altitude ≤ 2000m: Ambient temperature up to +35°C (according to national standard correction).

  • Altitude ≤ 3000m: Ambient temperature up to +30°C.

• Humidity & Environmental Protection: Daily average relative humidity ≤ 95%; Monthly average relative humidity ≤ 90%. For high-humidity environments, integrated heating and dehumidification equipment is utilized.

• Seismicity / Earthquake Resistance: Safe for application in heavy-duty areas with seismic intensities up to 9 degrees.

• Atmospheric Integrity: The surrounding atmosphere must remain completely free from corrosive gases, flammable or explosive gases, heavy water vapor, or dense particulate pollution.

• Operation Limit: No regular strenuous physical exercise or heavy vibration in the installation area.

• High Seismic & Fault Resilience: Specially rated for extreme conditions, capable of withstanding seismic forces up to 9 degrees and absorbing short-circuit impacts up to 50kA, making it ideal for critical infrastructure.

• Effortless Serviceability via Center-Mounted Drawer: The advanced removable handcart design permits swift maintenance, rapid testing, and minimal isolation delays, maximizing uptime for heavy industrial operations.

• Uncompromising Multi-Compartment Armor: Rigid, grounded metal-clad isolation of high-voltage components ensures absolute personnel safety, successfully containing localized faults and preventing collateral damage.

• Tailored for Severe Climates: Features highly flexible environmental adaptations (TH/TA options) coupled with smart automated anti-condensation heating systems to perform flawlessly across humid, tropical, and high-altitude regions.

• Global Engineering Compliance: Meticulously compliant with IEC298 and GB3906 benchmarks, establishing it as a top-tier, low-maintenance power distribution asset trusted by utility grids and mining enterprises worldwide.