Structural characteristics of complete switchgear

1. The frame of MNS low-voltage switchgear is a combined structure, and the basic frame is assembled from C-type steel. All structural parts of the cabinet frame are galvanized and locked by self tapping screws or 8. The basic cabinet frame is firmly connected with grade 8 hexagon bolts, and the complete set of switchgear is assembled with doors, partitions, mounting brackets, bus functional units and other components corresponding to the scheme change. The internal dimension, component dimension and compartment dimension of the complete set of switch cabinet are changed according to modularization (E = 25mm).

2. Each cabinet body of MNS combined low-voltage switchgear is divided into three chambers, namely horizontal bus chamber (at the rear of the cabinet), drawer chamber (at the front of the cabinet), and cable chamber (at the lower part of the cabinet or at the right in front of the cabinet). The rooms are separated from each other by steel plates or high-strength flame-retardant plastic functional plates, and the metal plates with ventilation holes are isolated between the upper and lower drawers, so as to effectively prevent the accidents caused by arcing of switching elements caused by faults or short circuit between bus and other lines.

3. The structural design of MNS low-voltage complete switchgear can meet the requirements of various incoming and outgoing schemes: upper in and upper out, upper in and lower out, lower in and upper out, lower in and lower out.

4. Compact design: accommodate more functional units in a smaller space.

5. The structural parts have strong universality 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 bus is protected by high-strength flame retardant and high insulation strength plastic functional board, which has fault arc resistance performance and makes the operation and maintenance safe and reliable

7. The mechanical interlocking mechanism of drawers of various sizes meets the standard, with three obvious positions of connection, test and separation, which is safe and reliable.

8. The standard module design is adopted: it can form standard units such as protection, operation, conversion, control, adjustment, measurement and indication, which can be assembled arbitrarily according to requirements. 9. High strength flame retardant engineering plastics are used to effectively strengthen the protection and safety performance.

10. Generalization, high degree of standardization and convenient assembly. With reliable quality assurance.

11. The cabinet body can choose the corresponding protection grade according to the different requirements of the working environment.

12. Equipment protection continuity and reliability.

13. The maximum current carrying capacity of mns3.0 is 6300A, and the impulse short-circuit current withstand capacity of main bus is 220kA.