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4. Installation
DANGER
All UPS installation operations must be carried out exclusively by a SKILLED TECHNICIAN qualified and authorized
by LEGRAND (paragraph 2.2.1).
4.1
Safety regulations
DANGER
Before carrying out any installation operation you must read and apply the following:
- The UPS has a high leakage current. The earthing connection must be connected before cabling the UPS input. The
switchgear must have a safe connection with the earthing and an adequate protection as required by the installation
standards.
- The UPS must only be installed in a fixed way with a thermal-magnetic circuit breaker placed upstream of it. Connection
to the mains via traditional type plug is not allowed.
- A circuit to protect from voltage backfeed made as in the diagrams shown in paragraph 4.2.5 must be provided outside
the UPS.
- The switchgear or the disconnector switch must be installed near the equipment and must be easily accessible.
- A warning label must be placed on all the mains disconnector switches installed away from the area of the UPS to remind the
assistance personnel of the fact that the circuit is connected to a UPS. The label must contain the following or equivalent text:
- Do not carry out the installation in presence of water or humidity.
- Open only the UPS panels necessary for the electrical connections. After that, close and fix them.
- Check there is no mains voltage on the equipment.
- Check that the loads are off and disconnected from the UPS.
- Check that the UPS is off and no voltage is present.
- Check that the fuse breakers on the external battery cabinets (if present) are open.
- Check that all battery drawers (if present) are not fully inserted in the UPS cabinet.
- Check that the mains input voltage and frequency correspond with the values indicated in the technical data on the
UPS rating plate.
- Check that the earthing has been carried out in compliance with IEC (International Electrotechnical Commission) stand-
ards or local regulations.
- Check that the electrical system has been fitted with the necessary differential and thermal-magnetic protections up-
stream of the UPS.
- The energy quality of the electrical network should comply with the individual voltage harmonics compatibility levels
defined by EN 61000-2-2. For more severe conditions, a power quality audit is required during the UPS commissioning
by the LEGRAND Technical Support Service in orded to check the compatibility.
4.2
Electrical connections
The electrical hook-up of the UPS to the switchgear or to the external battery cabinets is part of the installation that is not
normally performed by the UPS manufacturer. For this reason, the indications that follow are to be considered approxi-
mate and it is recommended that the electrical connections are based on local installation standards.
After removing the UPS from the packaging and positioning it in its definitive place, the Skilled Technician can begin to
make the electrical connections.
WARNING
The choice of cables type and their cross sections depending on the rated current and their installations must be made as
indicated by the local installation standards and it is a responsibility of the Skilled Technician.
The input current and the output power of the UPS are indicated in chapter 10 and the battery current in table 4 of chapter 11.
INDICATION
Chapter 11 includes tables with the recommended cables, fuses, automatic and differential breakers.
Before working on this circuit
- Isolate Uninterruptible Power System (UPS)
- Then check for the presence of Hazardous Voltage
between all terminals including the protective earth
Risk of Voltage Backfeed
Keor MOD
17
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