applies to electronic uninterruptible power systems (UPS) with an electrical energy storage device in the d.c. link. It is to be used with IEC 60950-1 which is referred to in this standard as "RD".
Document identifier
IEC 62040-1-2 Ed. 1.0 b:2004
Title
Uninterruptible power systems (UPS) - Part 1-2: General and safety requirements for UPS used in restricted access locations