EXS
User Manual 10H52260UM60 - Rev. 1 - 10/2017
69
Number Of Batteries
The number of batteries, EOD voltage, and float charging voltage must be consistent with the voltage selection
(380V/400V/415V), as shown in Table 6-2.
Table 6-2 Number of batteries
Parameter
380V/400V/415V
Number of cells (standard)
192, 240
EOD voltage
1.60Vdc/Cell - 1.85Vdc/Cell, 1.62V/cell recommended
Float charging voltage
2.2Vdc/Cell - 2.3Vdc/Cell, 2.27V/cell recommended
6.6
Battery Protection
If internal batteries are selected, the UPS is equipped with an internal fused designed to protect the
internal battery. If external batteries are selected, please select a circuit breaker with sufficient DC
breaking capacity.
The external battery must be connected to the UPS via the circuit breaker. In the case of rack-mounted
batteries (or batteries that are installed at a distance from the UPS cabinet), the circuit breaker must be
installed as close to the battery as possible, and the length of the power and signal cables connected to the
UPS must be kept to minimum.
To obtain the required backup time, the batteries may be connected in parallel. In this case, the
circuit breaker must be installed downstream of the battery parallel connection point.
Note
Only trained personnel may operate and service the battery circuit breaker.
6.7
Battery Installation and Connections
Battery Installation
1. Before installation, check the batteries for damage, inspect and count the accessories, and carefully read this
manual and the user manual or installation instructions provided by the battery manufacturer.
2. There must be a vertical gap of at least 10 mm between the batteries in order to ensure the free circulation of the
ambient air between the batteries.
3. A certain amount of clearance shall be maintained between the top of the batteries and the next layer in order to
facilitate battery monitoring and service operations.
4. Install the batteries starting from the bottom layer and working upwards, in order to avoid creating a high centre
of gravity. The battery shall be properly installed and protected against vibration and/or impacts.
