EXS
User Manual 10H52260UM60 - Rev. 1 - 10/2017
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Chapter 6
Battery
This section introduces the battery, providing information about safety, installation and maintenance, and the
battery protection function.
6.1
Introduction
The UPS battery string consists of a number of batteries connected in series, and provides rated DC input voltage
for the UPS inverter. The required battery backup time (i.e. The length of time the battery is able to supply the load
for following a mains failure) depends on the ampere-hour value of the battery. Under certain conditions, it may be
necessary to connect several battery strings in parallel.
For ease of installation, the battery is generally placed in the specially designed battery rack or a dedicated battery
room.
During the maintenance or repair, the battery must be disconnected from the UPS. This may be achieved by using a
suitably rated battery circuit breaker. This circuit breaker must be located as close as possible to the battery
connection terminals, while the length of the power and signal cables connected to the UPS must be kept to a
minimum.
When several battery strings are connected in parallel in order to increase the battery backup time, each string must
be fitted with its own disconnecting device, so that, when it is necessary to carry out maintenance work on an
individual battery string, the normal operation of the other strings is not affected.
6.2
Safety
Take special care when working with the batteries associated with this UPS. When all the blocks are connected, the
battery string voltage can reach 540Vdc. This is potentially lethal. Please follow the precautions for working with
high voltages.
Only qualified personnel may install and service the battery. To ensure safety, the external batteries must be
installed inside a lockable cabinet or in a purpose-designed, dedicated battery room, so that they are only
accessible to qualified service personnel.
Confirm that the battery switch has been set to off before carrying out battery maintenance operations.