Product Features
1. The frame of MNS low-voltage switchgear is a combined structure, and the basic frame is assembled from C-shaped steel. All structural parts of the cabinet frame are galvanized, and are firmly connected by self-tapping locking screws or 8.8-grade hexagonal bolts to form a basic cabinet frame, plus doors, partitions, mounting brackets, and busbar functional units corresponding to program changes. into a complete switchgear. The internal dimensions of the switchgear, the dimensions of the components, and the dimensions of the compartments are all changed according to the modularization (E=25mm).
2. Each cabinet of the MNS type combined low-voltage switchgear is divided into three rooms, namely, the horizontal busbar room (at the back of the cabinet), the drawer room (in the front of the cabinet), and the cable room (in the lower part of the cabinet or on the right side of the front of the cabinet). ). The rooms are separated from each other by steel plates or high-strength flame-retardant plastic functional plates, and the upper and lower drawers are separated by metal plates with ventilation holes, so as to effectively prevent the arcing of the switching elements or the short circuit between the busbar and other lines caused by the failure of the switching element. accident caused.
3. The structural design of the MNS low-voltage switchgear can meet the requirements of various incoming and outgoing line schemes: top entry and top exit, top entry and bottom exit, bottom entry and top exit, bottom entry and bottom exit.
4. Compact design: accommodate more functional units in a smaller space
5. Structural parts have strong versatility and flexible assembly. With E=25mm as the module, the structure and withdrawable units can be combined arbitrarily to meet the needs of system design
6. The busbar is protected by high-strength flame-retardant and high-dielectric-strength plastic functional boards, which have anti-fault arc performance and make operation and maintenance safe and reliable
7. The mechanical interlocking mechanism of drawers of various sizes conforms to the standard and has three obvious positions of connection, test and separation, which are safe and reliable.
8. Standard module design is adopted: standard units such as protection, operation, conversion, control, adjustment, measurement, and indication can be composed respectively, and can be assembled arbitrarily according to requirements.
9. High-strength flame-retardant engineering plastics are used to effectively enhance the protection and safety performance.
10. Generalization, high degree of standardization, easy assembly. With reliable quality assurance.
11. The cabinet can choose the corresponding protection level according to the different requirements of the working environment.

Working Environment
1 The altitude does not exceed 2000M.
2 The short-term maximum temperature is 40°C, the 24-hour average maximum temperature is 35°C, and the minimum temperature is -5°C.
3 The annual average relative humidity of the air is not more than 90%.
4 Places without obvious severe vibrations, shocks and bumps.
5 There are no flammable and explosive materials, and there is no gas and conductor dust in the surrounding air that can corrode metals and damage insulation.

Technical Parameters
Main circuit rated voltage (V) AC400V, AC660V
Auxiliary circuit rated voltage (V) AC110, 220, 380V, DC110, 220V
Rated frequency (Hz) 50 (60) HZ
Rated insulation voltage (V) 660 (1000) V
Rated current (A) horizontal busbar ≤=6300A
Vertical busbar ≤630~2000A
Power frequency withstand voltage (1min/V) Main circuit 2500V
Auxiliary circuit 1800V
Handle 3750V
Bus short-time withstand current (1S)/KA 50 (80) KA
Enclosure protection grade IP30, IP40
Comply with the standard GB7251.1, IEC60439-1

Dimensions
Cabinet standard size H (mm) x W (mm) x D (mm)
Cabinet height (H): 2200
Cabinet width (W): 600, 800, 1000
Cabinet depth (D): 800, 1000