The MDB provides readings of electrical parameters (voltage,current,frequency,..etc) via digital power meter mounted on the door. Supplying energy of whole project is one of the MDB responsibilities, electricity power distribution requires protection of both equipment and human which is fully achieved and included in MDB.  The status of electrical components installed inside MDB can be known through the indication devices. The control components on the door allow manual operation of many devices such as main circuit breaker.