Vertiv EXM 0080kTK16FN01000, User Manual

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90 Chapter 6 Battery
Liebert EXM 80kVA ~ 200kVA UPS User Manual
battery shall be used in 15°C ~ 25°C. If the battery cabinet is installed near the UPS, the maximum design
ambient temperature shall be determined according to the battery rather than the UPS. That is, if
valve-regulated battery is used, the indoor ambient temperature shall be 15°C ~ 25°C rather than the
operating temperature range of the main equipment. Under the precondition that the average
temperature will not exceed 25°C, it is allowed to have short time temperature deviation.
6.5.2 Number Of Batteries
The system battery cell number is 30 by default, and the cell float volatge is 2.27V. The number of
batteries, EOD voltage, and float charging voltage under the 380V/400V/415V voltage system are
consistent, as shown in Table 6-2.
Table 6-2 Number of batteries
Parameter 380V/400V/415V
Number of cells (standard) 180 ~ 264
EOD voltage 1.60Vdc/Cell ~ 1.90Vdc/Cell, 1.63V/cell recommended
Float charging voltage 2.2Vdc/Cell ~ 2.3Vdc/Cell, 2.27V/cell recommended
6.6 Battery Protection
Over current protection for the battery circuit must be provided by the customer when using external
batteries or a battery cabinet installation not supplied with the EXM UPS.
The protective device should be fitted as close as possible to the battery and must be capable of
protecting the battery against short-circuits, and should take into account the maximum current drain (in
discharge at 1.8V per cell), see Table 6-4 for detailed recommendation.
The short circuit current rating for an entire battery string or system should be calculated by an engineer
or a qualified person based on how the battery system is designed at the particular facility, and battery
manufacturer shall be consulted for battery short circuit current values.
It is recommended to use the Battery Circuit Breaker (BCB) which includes additional hardware and
controls to interface with the UPS which provides additional features to control the closure of the breaker
and disconnect the batteries automatically.
This ensures the batteries cannot be connected on power-up if the start-up procedure is not followed and
provides the addition controls to isolate automatically for the following conditions.

End of battery discharge voltage (EOD)

Emergency Power Off activated (EPO)

UPS fault condition
6.7 Battery Installation And Connection
6.7.1 Battery Installation
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. There shall be at least 10mm gap between the batteries in vertical direction, to ensure the free
circulation of the ambient air of the batteries.