Section IV
Maintenance
Page 4.5
BP
II S, 3.00
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CAUTION
A battery can present a risk of electrical shock and high
short circuit current. The following precautions should
be observed when working on batteries:
1. Remove watches, rings or other metal objects.
2. Use tools with insulated handles.
3. Wear rubber gloves and boots.
4. Do not lay tools or metal parts on top of batteries.
5. Open Battery Circuit Breaker prior to connecting or
disconnecting battery terminals.
6. Determine if the battery is inadvertently grounded. If
inadvertently grounded, remove the source of the
ground. Contact with any part of a grounded battery
can result in electrical shock. The likelihood of such a
shock will be reduced if such grounds are removed
during installation and maintenance.
0.
4.6.2
Maintenance Shutdown of Batteries
This procedure is for shutting down the UPS batteries. It does not require that the
protected load be removed from the UPS.
Perform the following steps in the order presented:
1. Verify that the UPS is running on input
ac power by noting the dc link voltage.
Depress
or
to obtain the
Rectifier/Booster Link voltage message
on the screen. Rectifier voltage should
be 195 VDC or greater.
Do not proceed if batteries are supplying power to any protected equipment.
2. Shut off Battery Circuit Breaker.
3. A general alarm will appear as the circuit
breaker is opened. This is normal.
Depress the ALARM SILENCE button
once to turn off the audible alarm.
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Rectifier/Booster Link
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