11
EN
Operating modes 'MODULYS GP' 100 kW UL - Ref.: IOMMODGPXX09-EN 03
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)
Backfeed electrical diagram
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
B
L1
L2
L3
N
UPS output
voltage
Backfeed Card
Dry Contact
max
250V
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
Detail
(Connector name)
V OUT
Internal fuse
BKF AUX
COM1
(XB1)
- NO1
(XB3)
250 V RMS
2 A time delay
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.
Содержание Green Power 2.0
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