Eaton 93PR Series - Chapter 7 UPS MAINTENANCE; 7.1. Important Safety Instructions; WARNING

Eaton 93PR 15-80 kW UPS
Installation and Operation Manual
74
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Chapter 7 UPS MAINTENANCE
The parts and components in the UPS cabinet are xed on a rugged metal rack. All the parts and components
are properly positioned to facilitate disassembly. In this way, the maintenance cost and time can be reduced.
To ensure normal operation of the UPS system, it’s necessary to prepare a regular performance inspection
plan. Regular routine operational inspection and system parameter inspection can effectively prevent faults and
ensure long-term service of the equipment.
7.1. Important Safety Instructions
Notes: The UPS system can supply power to equipment even if the AC mains supply is interrupted.
The inside of the UPS module is safe only when the DC power supply is disconnected and the
electrolytic capacitors are discharged. After the interruption of AC mains supply and DC power
supply, the maintenance personnel shall wait for at least 5 minutes until the capacitor is fully
discharged before approaching the inner part of the UPS module.
WARNING
• The maintenance shall be performed by Eaton customer service engineers.
• The voltage is lethal. Stop using the UPS when the cabinet door is opened or the protective
plate is removed. Do not conjecture the energized status of any cabinet in the UPS system.
As each battery string is an energy source itself. Do not touch any area inside a battery string,
as there is always voltage in the battery string. If you suspect that a battery string needs repair,
please contact the service representative.
Please observe the following rules when working on or around the battery:
• Remove any watch, ring, or other metal objects from your body.
• Use tools with an insulated handle.
• Wear insulated gloves and shoes.
• Do not put any tools or metal parts on the battery or battery case.
• Disconnect the charging power supply before connecting or disconnecting terminals.
• Check whether any battery is accidentally grounded. If any, remove the grounded power supply. An
electric shock may be caused by touching any part of a grounded battery.
• For battery replacement, use batteries of the same type and specications as those originally used in
the UPS system.
• Dispose of used batteries properly. Refer to the local disposal regulations.
• Do not throw the battery into a re, as it may explode.
• Do not disassemble or damage any battery. The released electrolyte may be toxic, which may harm
the skin and eyes.