MNS Low-voltage Withdrawable Switchgear
MNS Low Voltage Withdrawable Switchgear is an advanced low-voltage switchgear that designs according to demands for the development of power industry . The product conforms to provisions in the national standards GB7251, VDE660 and ZBK36001-89 Low Voltage Withdrawable Switchgear and international standards IEC439, and MNS Low-voltage Switchgear satisfies various demands for power supply and power distribution. It can be widely used for various low-voltage power distribution systems of the power plants, transformer substations, industrial and mining enterprises, buildings & hotels, municipal constructions, etc.
Item Unit Data Rated Insulation Voltage V AC 660 Rated Operating Voltage V AC 380 Rated Operating Frequency Hz 50 Rated Operating Current Horizontal Bus A 630-3150 Vertical Bus A 800-2000 Effective Value / Peak Value of the Rated Short-time Withstand Current Horizontal Bus A 50-100/105-250 Vertical Bus A 60/130-150 Drawer Form 8E/4 8E/2 8E 16E 24E Maximum Number of Units Contained 36 18 9 4 3 Protection Level IP3X Name Unit Data Height mm 2200 Width mm 600, 800, 1000 Depth mm 800, 1000 1. MNS Low-voltage Switchgear framework has the composite structure, and the basic framework is assembled with C-shaped steel. All structural components of the cabinet frame are galvanized, and are firmly connected into the basic cabinet frame with self-tapping locking screws or Level 8.8 hexagon bolts. The complete switchgear is assembled with the doors, partition boards, mounting brackets, bus function units and other components changed with schemes. The internal dimensions of the switchgear, part dimensions and compartment dimensions are changed in a modular (E=25mm) way.
2. Each cabinet of MNS Low-voltage Switchgear is separated into three chambers, i.e., horizontal bus chamber (behind the cabinet), drawer chamber (in front of the cabinet) and cable chamber (below or at the front right of the cabinet). The chambers are separated with either the steel plate or the high-strength flame retardant plastic function board, the upper and lower drawers are separated with the metal plate with ventilation holes, so as to effectively prevent arc-over of the switching elements caused by failure or accident; or by short circuit between the bus and other lines.
3. The structure design of MNS Low-voltage Switchgear can meet requirements in various schemes of incoming and outgoing line, up-in and up-out, up-in and down-out, down-in and up-out and down-in and down-out.
4. Compact design: contain more function units with narrow space.
5. Structural components have strong universality and can be assembled flexibly. With E=25mm as the module, the structure and the withdrawable unit can be combined at discretion, so as to satisfy meet the demands for system design.
6. The high-strength flame-retardant plastic function board with high insulation strength is adopted for bus protection, which has the function to resist fault arc, so as to ensure a safe and reliable operation and repair.
7. The mechanical interlock mechanism of drawers of various sizes conforms to standard provisions. There are three obvious positions of connection, test and separation, which is safe and reliable.
8. Standard module design is adopted: they can constitute protection, operation, conversion, control, adjustment, measurement, indication and other standard units, and can be assembled at discretion according to any requirement.
9. High-strength flame-retardant engineering plastics are used to effectively enhance the safety performance.
10. High generalization and standardization, and convenient assembly. With reliable quality assurance.
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