High quality electrical power distribution system

A system for distribution of high quality electrical power to a plurality of loads from an AC electrical power distribution network, said system comprising:

• a central module for converting alternating current of the AC network into direct current, said central module comprising at least one autonomous back-up DC power source so as to constitute a permanent DC power source;
• a DC distribution network connected to the central module for distributing direct current received from the central module;
• a plurality of terminal modules connected to receive direct current from the DC distribution network, wherein each of the plurality of terminal modules is connected to a corresponding one of the plurality of loads which are to receive power from the system, each of the plurality of terminal modules includes conversion means for converting the direct current received from the DC distribution network into at least one of a predetermined high quality AC and DC current suitable for the corresponding load connected thereto, and each of the plurality of loads are functionally isolated from each other by the terminal modules;
• and
• communication means for communicating data representative of the state of the system at least between each terminal module and the central module;
• wherein the data representative of the state of the system comprises data representing a signal indicating operation of the central module from the autonomous power source and data representing an end of back-up time pre-alarm signal.