Open Knife Switch | High-Safety Isolation Up to 6300A

Since its founding in 1992, ZHNYU Electric has perfected the production of open knife switches through advanced R&D and manufacturing expertise. An open knife switch is a vital component for manual isolation, providing a visible break in the circuit. Our production processes incorporate precision CNC machining and robotic welding, achieving tolerances of ±0.05mm to ensure consistent blade contact. Each switch undergoes a 12-step inspection protocol, including contact resistance tests, thermal cycle tests, and high-voltage withstand up to 10kV. This meticulous approach is why over 100+ production equipment lines output more than 1 million switch units annually. Our factory, spanning 10,000 square meters, houses a specialized line for open knife switches, utilizing silver-based contact alloys that ensure low resistance and high durability. On average, our switches endure over 20,000 mechanical operations and 10,000 electrical operations without failure, a testament to our robust engineering.