DISTRIBUTION SWITCHBOARDS AUXILIARY SUPPLY SYSTEM

摘要

A distribution switchboard auxiliary supply system, in which the supply function is integrated in a functional unit or within each switching device. The power is drained from the Medium Voltage busbars by using either an already available metering or measuring voltage transformer, or a suitable compact device. The self-supply function can act as a back-up of the auxiliary supply, thus allowing a higher availability even in case of loss of the auxiliary supply system, or can be used as the only source of supply.