high voltage means the set of nominal voltage levels that are used in power systems for bulk transmission of electricity in the range of 44kV<Un 220 kV. [ SANS 1019];
voltage means the root-mean-square value of electrical potential between two conductors.
low voltage means the set of nominal voltage levels that are used for the distribution of electricity and whose upper limit is generally accepted to be an a.c. voltage of 1000V ( or a d.c. voltage of 1500 V). [SANS 1019]
High voltage bus means the electrical circuit, including the coupling system for charging the REESS that operates on high voltage.
Working voltage means the highest value of an electrical circuit voltage root-mean-square (rms), specified by the manufacturer, which may occur between any conductive parts in open circuit conditions or under normal operating conditions. If the electrical circuit is divided by galvanic isolation, the working voltage is defined for each divided circuit, respectively.