Description
Sub Main Distribution Boards are used to distribute power from the MDB level to dedicated zones, floors, tenant areas, process sections, or equipment groups. MEMF SMDBs are designed for dependable secondary distribution with compact layouts, flexible mounting options, and coordinated protection for commercial and industrial applications.
Application Advantages
- Ideal for floor-wise or area-wise power distribution.
- Supports cable entry from top or bottom with front access for maintenance.
- Available for wall-mounted or floor-mounted installations.
- Provides a practical balance between compact size and distribution flexibility.
Technical Specifications
| Standard | Type-Tested Switchboard Assemblies (TTA) – IEC 61439-1 & 2 |
| Test Certificate | IPH |
| Rated Insulation Voltage (Ui) | 1000 V |
| Rated Operating Voltage (Ue) | 415 V |
| Rated Impulse Withstand Voltage (Uimp) | 2.5 kV |
| Overvoltage Category | II |
| Rated Frequency | 50 / 60 Hz |
| Rated Current (Ie) | 800 A |
| Rated Peak Withstand Current (Ipk) | 52.5 kA |
| Rated Short-Time Withstand Current (Icw) | 25 kA / 1 s |
| Form Of Separations | Up To FORM-4b |
| Fixation | Wall / Floor Mounted |
| Degrees Of Protections | Upto IP 54 Indoor (IEC 60529) |
These boards are designed for secondary zoning, bridging the gap between high-level Medium Voltage Switchgear (MV Switchgear), incoming Gas Insulated Switchgear (GIS), and final Low Voltage Switchgear (LV Switchgear) points. They allow for flexible, partitioned electrical power distribution across building floors and plant sections. In typical Doha setups, these secondary boards distribute power reliably from main lines protected by heavy-duty Metal-Clad Switchgear assemblies.
