Installation Manual Liebert Hipulse E Chapter 2 - Installation Procedure
Single or '1+N' UPS System Installation (Electrical)
(07/04) Page 2-1
2 Chapter 2 - Installation (Electrical)
The UPS requires both «power» and «control» cabling once it has been mechanically installed. All «control» cables,
whether screened or not, should be run separate from the power cables in metal conduits or metal ducts which are
electrically bonded to the metalwork of the cabinets to which they are connected.
2.1 Power Cabling
WARNING
BEFORE CABLING-UP THE UPS, ENSURE THAT YOU ARE AWARE OF THE LOCATION AND
OPERATION OF THE EXTERNAL ISOLATORS THAT CONNECT THE UPS INPUT/BYPASS SUPPLY TO
THE MAINS DISTRIBUTION PANEL.
CHECK THAT THESE SUPPLIES ARE ELECTRICALLY ISOLATED, AND POST ANY NECESSARY
WARNING SIGNS TO PREVENT THEIR INADVERTENT OPERATION.
For cable entry, refer to section 1.3.11.
2.1.1 System Configuration
The main factors affecting the choice and size of cable are voltage, current (also taking into account overcurrent), room
temperature and conditions of installation of the cable.
Note: Correct cable size must also take into account the system’s overload capacity (see Chapter 5 – Technical
Specifications: - Electrical Characteristics).
The power cables of the system must be size with respect to the following description:
Module input cables
The module input cables must be sized for the maximum input current, including the maximum battery recharge
current, given in table 2-1, with respect to the module rating and the input a.c. voltage.
WARNING (300 kVA UPS)
Note 1: For split Bypass operation ensure that the busbars (*) between Bypass and Rectifier input are removed.
Note2: With a Class ‘A’ EMC filter (optional) and a ‘common’ input configuration, the capacitors on the
Rectifier input bars must be removed.
WARNING (400 kVA UPS)
Note: for a common input power configuration (single supply) interconnecting cables are required, connecting the
rectifier input with the bypass input (links about 1.5m long), with cables sized for the maximum input current in table
2-1.
Module Bypass and output cables
The bypass and output cables must be sized for the nominal output current, given in table 2-1, with respect to the
module rating and the output a.c. voltage.
Battery cables
Each UPS module has its own battery, which is connected using two cables, one positive and one negative. The battery
cables must be sized for the battery discharge current at the end-of-discharge voltage, as given in table 2-1 with respect
to the module rating.
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