socomec Modulys GP Green Power 2.0 Series Installation And Operating Manual page 11

BACKFEED PROTECTION
The UPS is set up for the installation of external protection devices against the backfeed of dangerous voltages on
the auxiliary backup mains power supply line (AUX MAINS SUPPLY). The current rating of the switching device has to
follow the instruction outlined in chapter 'Electrical requirements'.
DANGER! RISK OF ELECTRIC SHOCK!
The installer must attach the warning label in order to warn electrical technicians about dangerous
backfeed situations (not caused by the UPS)
Warning label (supplied with the equipment)
Before working on this circuit
- Isolate the Uninterruptible Power System (UPS)
- Then check for Hazardous Voltage between all terminals
including the protective earth
Risk of Voltage Backfeed
Backfeed card
NOTE!
Use a 220-240 V release coil with integrated travel limit contact to pilot the input protection
systems. If a trip coil without an integrated end-of-travel contact is used, an early auxiliary contact
must be added (see figure). Electrical data of the contacts: 2 A 250 Vac.
Function
BKF AUX
The backfeed protection for the input mains supply (MAINS SUPPLY) is incorporated inside the
UPS modules as standard.
As an option the unit can be delivered with the integrated internal backfeed switches.
Operating modes 'MODULYS GP' 100 kW UL - Ref.: IOMMODGPXX09-EN 03
Backfeed electrical diagram
Detail
(Connector name)
COM1 - NO1
(XB1) (XB3)
UPS output
L1
L2
L3
N
B
V OUT
250 V RMS
voltage
max
250V
Backfeed Card
Dry Contact
Internal fuse
2 A time delay
EN 11