An MDB is a panel or enclosure that houses the fuses, circuit breakers and ground leakage protection units where the electrical energy, which is used to distribute electrical power to numerous individual circuits or consumer points, is taken in from the transformer or an upstream panel. An MDB typically has a single or multiple incoming power sources and includes main circuit breakers and residual current or earth leakage protection devices.
| Applications | Operation, Control & protection of distribution network |
| System | 3 Phase, 3 or 4 wire, 50Hz |
| Rated Current | Upto 4000 Amps |
| Operational Voltage |
110/230v 415v AC |
| Rated Insulation | 1000v |
| Rated Service Voltage | 690v |
| Ambient Temperature |
45 Deg C |
| Short Time Current |
50KA for 1Sec, 105KA peak |
| Degree of Protection |
IP42, 54, 55, 65 as per Custom Requirement |
| Form of Sepration |
Upto 3B/4B (Optional Type 5) |
| Type Tested for |
Short Time Current withstand Temperature Rise Degree of Protection |
| Bus Bar | Aluminium or Copper |
| Ref. Standard |
IEC60439-1&2, IS:8623 |
| Feeder Configuration | Drowout or Fixed, Extendable Type |