22
ITYS
1-10 kVA - Ref.: IOMITYTWXX05-GB 00
12. SAFETY STANDARDS
12.1. ELECTRICAL REQUIREMENTS
The installation and the system must comply with pertinent national statutory regulations.
The fixed power distribution unit must include protection and isolation for the utility supply and the back-up supply. In the event that
a residual current device is installed on the UPS input line (optional), this must be located upstream of the power distribution unit.
Electrical requirements
UPS
Thermal-magnetic switch on
input
Input leakage current
Cable section
6 kVA
40 C
0.1 A type A
6 mm
2
10 kVA
63 C
0.1 A type A
10 mm
2
WARNING!
Use type A two-pole selective (S) RCDs. Any leakage currents at the loads will be added to that of the UPS, so
that current peaks can occur during transients (loss and restoration of mains supply), although these will be of
very short duration. Where loads generate high leakage current, ensure the rating of the RCD is suitably matched.
Always conduct a preliminary test for current leakage to earth. When connecting the UPS to the mains and the
load, it is strongly recommended that protective devices are installed. The protective devices must use approved
components that meet safety standards.
Always refer to local wiring regulations for correct cable sizes and protective device ratings depending on instal-
lation environment.
