Power rating 20kVA 40kVA 80kVA
Rated Battery Discharge Current (A) 62 124 247
Table 1.1 Power Rating and Rated Battery Discharge Current (A)
For safety, it is necessary to install circuit breakers or fused isolators in the input AC supply and external battery system.
Given that every installation has its own characteristics, this section provides guidelines for qualified installation personnel
with knowledge of operating practices, regulatory standards and the equipment to be installed. External overcurrent
protection must be provided. See equipment specification in the UPS manual for overload capacity.
An external battery protection device shall be installed to ensure adequate protection in case of short circuit fault: fuses or
circuit breakers suitable for DC applications. The external battery protection device shall be sized in accordance to the
available battery short circuit current and the battery string voltage.
WARNING! In case of missing or incorrect battery protection extensive damage to the batteries, the UPS, and
ancillary equipment can occur.
1.3 Maintenance
• Battery installation must be performed by authorized and qualified service personnel only. While performing the
battery installation, follow the below precautions:
• Remove watches, rings, or other metal objects.
• Use tools with insulated handles.
• Wear rubber gloves and boots.
• Do not lay tools or metal parts on top of batteries or battery cabinets.
• Disconnect the charging source prior to connecting or disconnecting terminal.
• Check the battery has been accidentally grounded. Remove the source of grounding if this is the case.
Contacting with any part of the ground might result in electrical shock. If such grounds are removed
during installation and maintenance, the risk of electric shock can be reduced.
• This UPS is designed to supply power even when it is disconnected from the utility power. Internal access to the
UPS should be attempted by authorized and qualified service personnel only after disconnecting the utility and
DC power.
• Do not disconnect the batteries while the UPS is in battery mode.
• Before connecting or disconnecting the terminals, disconnect the charging source.
• High short circuit current in batteries can cause electrical shock or burn.
• When replacing batteries, use the same number of sealed, lead acid batteries.
• Do not open or mutilate the battery. The electrolyte that is released might be toxic and potentially hazardous and
is harmful for the skin and eyes.
WARNING! Risk of electrical shock and hazardous voltage. Can cause damage to the equipment, injury or
death to personnel. Extreme caution is required when performing maintenance/repair. Be constantly aware
that the UPS system operates with hazardous voltages.
2 Proprietary and Confidential ©2024 Vertiv Group Corp. 1 Important Safety Instructions
Vertiv™ Liebert® MTP Online UPS User Manual 20-40-80kVA
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