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20 - 80 kVA parallel UPS systems
User’s and Installation Manual
1018390
Revision C
5
1. Safety Instructions
1.1 General
Warning!
The complete safety instructions (p/n: 1009917) must be followed when installing,
operating and servicing the parallel UPS system. Study the complete safety instructions
carefully.
Because of the high energy stored within the batteries, the UPS equipment must be handled
with care. The UPS must always be kept in the position marked on the package and must
not be dropped during storage or transportation. Moreover, do not place the parallel UPS
system in an airtight room.
The instructions are important for electrical safety with all personnel involved in UPS
handling. Any failure to recognise the electrical hazards could prove fatal or cause injury.
1.2 Installation and service
Switch off the supply to the distribution point to which the UPS unit is to be connected.
Remove the fuses from the selected line for extra safety precaution. Make absolutely sure
that there is no power connected to UPS modules.
Warning!
The parallel UPS system must be installed according to the instructions given on this
manual. Qualified electricians should carry out all electrical installation and maintenance
work on the parallel UPS system. Local safety legislation and regulations for electrical
UPS installations must be followed.
Any installation work must be done with the power off, and power is not to be reconnected
unless the installation work is complete. Ensure by measuring that the part of the cabinet
you are working on is not live.
Warning!
UPS modules are not provided with automatic power feedback relay. A readily
accessible disconnect device must be installed in the fixed input wiring. Note that
dangerous voltages remain in battery terminals when disconnect device is opened.
Ensure that the output of an UPS module is disconnected from the other parallel modules.
Thus, open the output service switch before any installation work or maintenance in a
parallel connected UPS module.
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