Core Product Positioning
✅ Precision Current Adaptation
Rated current range: 250A/400A/630A
Contact system: Silver-nickel alloy (contact resistance ≤50μΩ)
Mechanical lifespan: ≥3000 operations at rated current (≤6 operations/hour)
Isolation safety: Contact separation ≥20mm
✅ Harsh Environment Adaptation
Operating temperature: -50°C to +40°C
Structure: Reinforced steel enclosure + arc-resistant insulation base (5kV withstand voltage)
Wiring compatibility: Front/rear bidirectional terminals for copper cables ≤240mm²
✅ Safety Mechanisms
3-position handle: Clearly marked ON/OFF/ISOLATED statuses
Mechanical interlock: Prevents load-side isolation operations
Fuse compatibility: Supports quick replacement of NH-type fuses
Typical Applications
▌Main switch in distribution panels
As incoming switches for MCC distribution panels and capacitor compensation cabinets, enabling circuit control and overload protection.
▌Equipment power isolation
Local isolation points for industrial motors, transformers, and high-power heaters.
▌Emergency power switching
Manual isolation in dual-power transfer systems, coordinating with circuit breakers.
▌Short-circuit protection node
Fuse-based interruption with 50kA/415V breaking capacity.
