Air Circuit Breaker provides safety protection for high-voltage power distribution systems. The NSW1/NSW2 series covers 2000A-8000A current and is suitable for new energy, industry, rail transit and other fields. It adopts air arc extinguishing technology, with a high breaking capacity of 6kA/10kA, supports 1500VDC, and quickly cuts off short-circuit current. The frame current NSW1: 2000A-6300A, NSW2: 1000A-8000A, supports DC input and 1P-4P, built-in thermal magnetic/electronic tripping dual protection, accurate identification of overload, short circuit, ground fault, IP54 protection, modular expansion.