The MNS low-voltage withdrawable switchgear is developed based on the modular design concept of the Swiss ABB MNS series, combined with optimized structural and technical improvements. It is suitable for AC 50Hz power distribution systems with rated voltages up to 660V, providing reliable control for power generation, transmission, distribution, power transfer and end-user equipment. The switchgear is widely applied in mining enterprises, high-rise buildings, hotels, municipal engineering, and other industrial power systems. With special treatment, it can also be used in marine drilling platforms and nuclear power stations. The product meets IEC 439-1, IEC 61439-1 and GB 7251.1 standards.
Modular and Flexible Structural Design
The basic frame adopts a combined assembly structure, using zinc-plated steel components fixed with self-tapping or 8.8-grade square screws to ensure high rigidity. According to specific configurations, various doors, cover plates, partitions, installation brackets, busbars and function units can be flexibly integrated into a complete device. A 25mm modular concept is used throughout the compartments to support standardization and flexible expansion.
Core Advantages of MNS Withdrawable Switchgear
Compact design enables more function units within a limited space, ensuring high installation efficiency. The universal structure and flexible assembly meet different operational environments and protection levels. Standard modular units support protection, operation, control, regulation, measurement and indication functions, offering more than 200 configurable combinations for cabinet and drawer unit design. High-strength flame-retardant engineering plastics are used to improve safety and durability. The electrical and mechanical performance reaches advanced domestic levels.
Environmental and Operating Conditions
The device operates within a temperature range of -5°C to +40°C, with a maximum average of +35°C over 24 hours. Air should be clean with relative humidity below 50% at +40°C, rising to 90% at +20°C under proper condensation control. It is suitable for installation at altitudes below 2000m. Transportation and storage temperatures range from -25°C to +55°C, and can temporarily reach +70°C without causing irreversible damage. If the device is used on marine drilling platforms or in nuclear power facilities, a dedicated technical agreement is required.
Withdrawable MCC Options
The MNS system offers withdrawable-type MCC units with single-side or double-side operation options up to 800A. For 1000mm depth MCC cabinets, single-side operation supports 800A to 2000A, ensuring strong adaptability for industrial motor control systems.
Performance parameters
| Rated working voltage (V) | Ratedinsulation voltage (V) | Rated working current (A) | Rated shorttime withstandcurrent effective value/peak (IS) | IP30,IP40 protectionlevel of shell | ||
| Horizontal busbar | Verticalbusbar | Horizontal busbar | Vertical busbar | Boundary dimension (H*W*D) | ||
| 380,660 | 660,1000 | 630-5000 | 800-2000 | 50-100/105-250 | 60/130-150 | 2200*600(800,1000)*800 (1000) |
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