This part of IEC 60204 applies to electrical and electronic equipment and systems to machines, including a group of machines working together in a co-ordinated manner, which
operate at nominal voltages above 1 000 V AC or 1 500 V DC and not exceeding 36 kV AC or
DC with nominal frequencies not exceeding 60 Hz.
In this document, the term HV equipment also covers the LV equipment forming an integral part of the equipment operating at high voltage. The requirements in this document primarily cover the parts operating at high-voltage except where explicitly stated otherwise.