Figure 43: Warning label
Since each battery string is an energy source in itself, opening the battery circuit
breaker does not de-energize the voltage within the battery string.
DANGER
Do not attempt to access any internal area of the battery string yourself.
Voltages are always present in the battery strings. If you suspect that a
battery string needs service, contact your service representative.
Obey these precautions when working on or around batteries:
• 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.
• Prior to connecting or disconnecting terminal, disconnect the charging
source.
• Determine if the battery is inadvertently grounded. If it is, remove the source
of the ground. Contact with any part of a grounded battery can result in an
electrical shock. The likelihood of such a shock is reduced if such grounds
are removed during installation and maintenance.
• When replacing batteries, use the same number of sealed, lead-acid
batteries.
• Dispose of batteries according to your local codes for disposal requirements.
8.3 Preventive maintenance
The UPS system requires very little preventive maintenance. However, inspect
the system periodically to verify that the units are operating normally and that the
batteries are in good condition.
© Eaton Corporation plc 2020. All rights reserved. Revision: 006 Document ID: P-164000493 109
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Eaton 91PS/93PS UPS 8–40 kW User’s and Installation Guide
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