Parameter 380 V/400 V/415 V
Number of cells (standard)
VRLA battery 180~264 cells:
• 192~264 cells without derating (Cell EOD voltage of battery is above or equal than 1.67 V).
• 192 cells derate 0.9 (Cell EOD voltage of battery is lower than 1.67 V),180 cells derate 0.8.
EOD voltage 1.60 VDC/Cell to 1.90 VDC/Cell, 1.67 V/Cell recommended.
Float charging voltage 2.2 VDC/Cell to 2.3 VDC/Cell, 2.27 V/Cell recommended.
Table 7.2 Number of Batteries
7.10 Battery Protection
IMPORTANT! Users must choose appropriate switching devices to protect the battery from short circuit and overload.
It is recommended to use the Vertiv BCB to provide better battery protection.
The battery is connected to the UPS through the BCB. The BCB is manually closed and has the electronic tripping device
controlled by the UPS control circuit. If the battery adopts rack mounting (or is far away from the UPS cabinet), the BCB must
be installed as close to the battery as possible, and the wiring distance of the power and signal cables connected to the UPS
must be minimized.
The BCB has the following features:
• Isolation
• Short circuit protection
• In case the inverter locked by battery under voltage, the switch automatically disconnects, avoid the damage of
battery over discharge.
• If equipped with a remote EPO button, can use the EPO button to remotely disconnect the BCB.
To obtain the required backup time, the batteries may be connected in parallel. In this case, each battery string must be
connected to a separate BCB.
NOTE: Only trained personnel must operate and maintain the battery circuit breaker.
7.11 Battery Installation and Connection
WARNING! Only qualified engineer should install and connect the batteries. The battery has hazardous high
voltage, and requires reliable insulated tools for safety protection.
1. Before installation, check the battery appearance to ensure that there is no damage, inspect and count the
accessories, and carefully read this manual and the user manual or installation instruction provided by the
battery manufacturer.
2. Make sure that there is at least 10 mm gap between the batteries in vertical direction, for the free circulation of
the ambient air of the batteries.
3. Certain clearance should be maintained between the battery top and the upper layer to facilitate for the
monitoring and maintenance of the battery.
4. The batteries should be installed from the bottom to top to avoid a too high gravity center. The batteries should
be properly installed and protected from vibration or shock.
132 Proprietary and Confidential ©2023 Vertiv Group Corp. 7 Battery
Vertiv™ Liebert® APM2 30 to 120 kVA Modular UPS User Manual
To Next Page
Loading...
