LV 148 is a member of the same family of joint requirements issued by several German vehicle manufacturers as the other LV numbers listed on this site, and it addresses the electromagnetic compatibility of high-voltage components. Within that family the numbers are assigned so that each covers a defined subject, which allows a programme to call up the numbers it needs rather than adopting the whole set, so a supplier should establish from the engineering specification which numbers apply rather than assuming that a neighbouring number covers the same scope. The subject here is the traction system, where the disturbance sources are the converters and the electric machines and where the measuring technique for emissions from the high-voltage cable differs from that used on the conventional installation, and the requirement consequently addresses the ports of the component in that specific context.