Chapter 6 Battery 45
APM 300 Integrated UPS Single Module And Parallel System User Manual
Chapter 6
Battery
This chapter introduces the relevant information of the battery, including the introduction, safety, power
cables, maintenance, recycling, reference current and connection of external BCB.
6.1
Introduction
The UPS battery string consists of batteries connected in series to provide rated DC input voltage for the UPS
inverters. The battery backup time (that is, the duration for the battery to supply the load when the mains
supply is interrupted) is subject to the ampere-hour capacity of the batteries. Therefore, it may be necessary
to parallel-connect several battery strings. Batteries of different manufacturers, models or used time cannot
be used together.
It is required to connect external batteries to the UPS. The external batteries are normally placed in a battery
cabinet.
Note
Before maintenance or service, it may be required to disconnect the battery from the UPS.
6.2
Safety
Take special care when working with the batteries associated with the UPS. When all the cells are connected
together, the battery string voltage can be up to 576Vdc and is potentially lethal. Please follow the
precautions for high voltage operation. Only qualified personnel are allowed to install and maintain the
battery. To ensure the safety, the external batteries shall be installed inside a key-lockable cabinet or in a
purpose-designed, dedicated battery room, so that they are segregated from all but qualified maintenance
personnel.
During battery maintenance, pay attention to the following items:
Isolate the battery string to be serviced completely from the UPS
The battery cell number setting (set by commissioning engineer) in the background software must be
consistent with the actual battery cell number
Note
Full safety instructions concerning the use and maintenance of UPS batteries are provided in the appropriate battery
manufacturers manuals. The battery safety information contained in this section relates to key considerations that must
be taken into account during the installation design process and might affect the design outcome depending on the
local conditions.
Warning: battery hazard
1. No user-serviceable parts are located behind covers that require a tool for their removal. Only qualified service
personnel are authorised to remove such covers.
2. Before operating the copper bars connected with the external battery, please disenergize the copper bars.
3. Observe the following safety precautions when working with the batteries:
a) The battery shall be firmly and reliably connected. After the connection is completed, all connections between the
terminals and the batteries shall be calibrated. The requirements on torque specified in the instructions or user manual
provided by the battery manufacturer shall be satisfied. All connections between the terminals and the batteries shall be
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