Vertiv APM 0250kMK16FN02000, User Manual

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7.5.2 Number of Batteries
The number of batteries, EOD voltage, and float charging voltage under the 380 V/400 V/415 V voltage system is
consistent, as shown in Table 7.2 below.
Param eter 380 V /4 0 0 V /4 15 V
Number of cells (standard) 180 to 264, 12-step
EOD voltage 1.60 Vdc/Cell to 1.90 Vdc/Cell, 1.63 V/cell recommended
Float charging voltage 2.2 Vdc/Cell to 2.3 Vdc/Cell, 2.27 V/cell recommended
T able 7.2 N u m ber o f batteries
7.6 Battery Protection
IM P O R T A N T ! Users m u st ch o o se appro priate switch in g devices to pro tect th e battery fro m sh o rt
circu it an d o verlo ad, etc. W e reco m m en d u sin g th e Vertiv B CB to pro vide a m o re perfect so lu tio n .
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
shall be installed as close to the battery as possible, and the wiring distance of the power and signal cables connected to
the UPS shall be minimized.
The BCB has the following features:
• Isolated
• Short circuit protection
• In case the inverter is locked by battery under-voltage the switch automatically disconnects to avoid the
damage of battery over-discharge
• If equipped with a remote EPO button, can use the EPO button to remotely disconnect the BCB
• Protection of mis-operation
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.
N O T E: O n ly train ed perso n n el sh all o perate an d m ain tain th e battery circu it break er.
7 Battery
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Vertiv™ Liebert® APM Plus User Manual