This part of 61000-5 defines how protective devices for conducteddisturbance proposed for HEMP protection shall be specified. It isintended to be used for the harmonization of existing or futurespecifications issued by protective device manufacturers,electronic equipment manufacturers, administrations and otherultimate buyers. Performance requirements shall be given in futureIEC documents.This section covers protective devices currently being used forprotection against induced HEMP transients on signal and lowvoltage power lines (nominal voltage up to 1 kV a.c.).General information can be applied also to high voltage lines.However, in these cases, the additional requirements for theprotection levels of existing lightning arresters (especiallygapless MO-arresters) are under consideration.