MNS type low-voltage switchgear (hereinafter referred to as equipment) is a product designed and developed on the basis of imported switchgear. Suitable for AC 50(60)Hz rated operating voltage 660V and below the system, for power generation, transmission, distribution, power conversion and power consumption equipment control. In line with the national standard GB7251-1 "Low-voltage switchgear and control equipment", JB/T9661 "low-voltage extraction switchgear" and the international standard IEC439. The device can be composed of cabinet structure and drawer unit of different schemes, and adopts high-strength flame-retardant engineering plastic components to effectively strengthen the protection and safety performance. The drawer unit has the characteristics of small size, strong function, high interchangeability, easy replacement and maintenance, reliable contact and so on.