Important Notices!
Thank you for choosing LEGRAND UPS System to supply your Critical Application.
This manual contains important information about commissioning, usage and technical properties of the
UPS. It also contains safety information for operator and instructions to secure your critical load. Applying
the recommendation detailed in this manual is necessary to use UPS safely and correctly.
The manufacturer reserves the rights to change the t
echnical specifica
tions
and design without notice.
LEGRAND reserves the rights to change the information in this document
without notice. Refer to
http://ups.legrand.com/
web site to dowload last
release and translations.
Units that are labelled with a CE mark comply with the Standard: EN 62040-1 and EN 62040-2.
Read the manual completely before working on this equipment!
Keep this manual in UPS’s front cover’s pocket for easy consultation!
Reproduction, adaptation, or translation of this manual is prohibited without prior
written permission of LEGRAND Company, except as allowed under the copyright laws.
4
2
40
Figure.6.3.1.8-2
Backfeed Protection Connection
for
Dual
Input
The following tables shows the backfeed contactors' specifications.
6.3.1.
9
.
Backfeed
Protection for Dual Input
External back feed protection device installation is necessary to prevent
hazardous voltage from being present on the UPS input AC distribution panel
after interruption of input AC power
Mains X1,auxiliary X4 and backfeed protection output X9 have to be connected as shown in Figure
6.3.1.8-2.