The KYN61-40.5 Armoured Removable AC Metal-Enclosed Switchgear is a heavy-duty, high-capacity medium-to-high voltage power distribution solution engineered for modern electrical networks. Operating at a rated voltage of 40.5kV under three-phase AC 50Hz single-busbar systems, this complete power distribution assembly excels in controlling, protecting, and monitoring critical electrical infrastructures.
Meticulously engineered to conform to strict international benchmarks including GB/T11022, GB3906, and DL404 standards, the KYN61-40.5 is built to deliver exceptional operational reliability. It serves as an essential backbone for power generation plants, heavy industrial and mining facilities, and key utility substations. The system is designed for high-frequency operations, providing safe and streamlined power acceptance, containment, and distribution under demanding grid conditions.

• Premium 40.5kV Voltage Class Protection: Purpose-built for higher-range medium-voltage substations, providing reliable arc containment and superior fault isolation.

• Heavy-Duty Short-Circuit Interruption: Offers a massive short-circuit breaking capacity of up to 31.5kA and closing current handling up to 80kA, shielding vital upstream assets from heavy grid faults.

• Withdrawable Move-Open Truck System: The floor-level removable structure facilitates seamless circuit breaker maintenance, rapid inspection, and effortless physical isolation.

• Advanced Rigid Compartmental Armor: High-grade metallic partitions separate vital sections, offering IP4X isolation between internal compartments to ensure complete personnel protection and minimize flashover propagation risks.

K Y N □ - 40.5

• K: Armoured Metal-Enclosed Switchgear

• Y: Removable / Withdrawable Type

• N: Indoor Operation

• □: Design Number / Sequence Code

• 40.5: Rated Voltage Rating (kV)

• Ambient Temperature Range: Upper limit +40°C, lower limit -10°C.

• Altitude Restrictions: Suitable for standard deployments up to 1,000 meters above sea level. Special high-plateau modifications support altitudes up to 3,000 meters.

• Relative Atmospheric Humidity: Daily average relative humidity ≤ 95%; Monthly average relative humidity ≤ 90%.

• Seismic / Structural Integrity: Engineered to maintain structural resilience in regions experiencing seismic activity not exceeding 8 degrees.

• Site Conditions: The installation site must remain strictly free from high fire risks, explosion hazards, chronic chemical corrosion, severe particulate dirt, or intense continuous mechanical vibrations.

• Exceptional 40.5kV Grid Stability: Precision-engineered for heavy medium-to-high voltage networks, providing massive insulation withstand capacity (up to 215kV lightning impulse) to safeguard your regional substations from severe voltage surges.

• Superior Heavy-Fault Suppression: Boasts a phenomenal short-circuit closing capacity of up to 80kA and a 4-second short-time thermal rating, effortlessly absorbing intense grid fault stresses without component degradation.

• Advanced Dual-Layer IP Protection: Delivers an intelligent protection matrix featuring IP4X inter-compartment partitioning and IP2X protection even when the breaker compartment door is opened, putting operator safety at the absolute forefront.

• Seamless Drawout Diagnostics: The robust move-open truck configuration allows massive power circuit breakers to be easily unlocked and withdrawn, transforming complex servicing into rapid, hazard-free routines.

• Premium Industrial Longevity: Built with high-grade treated steel framing and heavy-duty busbars in absolute compliance with GB/T11022, GB3906, and IEC standards, providing an ultra-durable, low-maintenance power backbone for mining, heavy manufacture, and grid utilities.