Small bus is the control power supply, signal power supply, protection power supply, AC voltage, AC power supply and other common integration line, generally placed on the top of the protection screen cabinet, with copper rod, aluminum bar or cable connection. It plays the role of collecting and distributing electric energy and belongs to the power supply mode of ring network. Can save the secondary cable, make the loop simple. The disadvantage is that it may cause a large range of protection, control circuit DC power supply disappearance. The power loop also uses the radiation wiring mode, each protection of the power supply, each breaker control power supply directly by the AC and DC distribution screen (DC feeder screen) respectively. Ac voltage has a special voltage distribution screen, also adopted radiation to connect to each protection device.
Post time: Mar-29-2022