User guide

11
Standards and Compliances, continued
UL and cUL
Compliance
UL Listed (cUL Certified) servo drives (Underwriters Laboratories Inc.) comply with
the relevant American and Canadian standards (in this case, UL 840 and UL
508C).
This standard describes the minimum requirements for electrically operated power
conversion equipment (such as frequency converters and servo drives) and is
intended to eliminate the risk of injury to personnel from electric shock or damage
to equipment from fire. Conformance with the United States and Canadian
standard is determined by an independent UL (cUL) fire inspector through the type
testing and regular checkups.
UL 508C
UL 508C describes the minimum requirements for electrically operated power
conversion equipment (such as frequency converters and servo drives) and is
intended to eliminate the risk of fire caused by that equipment.
UL 840
UL 840 describes air and insulation creepage spacings for electrical equipment and
printed circuit boards.