A SYSTEM FOR POWER DISTRIBUTION AND COMMUNICATION

摘要

The present invention relates to a system for power distribution and communication over a two-wire network (21; 51). The system (20; 30; 50; 70) comprises: a control unit (22); CU (dedicated or distributed) configured to receive power from said two-wire network and provided with a transceiver circuitry connected to the two-wire network, a power converter unit (23; 31;71) having a power converter (24) converts incoming voltage to a DC-voltage of less than 50 V and feeds the DC-voltage to the two-wire network, and a power fuse unit (25; 72) with a power fuse identity connected between the power converter (24) and the two-wire network (21; 51). The power fuse unit forwards the DC-voltage to the two-wire network and comprises: a transceiver circuitry connected to the two-wire network, and a fuse. The system is provided with means to monitor an amount of power consumed in the network, and means to activate the power switch in the power fuse unit (25; 72) when the amount of power consumed in the two-wire network exceeds predetermined limits.