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Introduction
Fortress provides complete, no-break power protection, including protection against
brownouts, high voltage, and surges. During a power outage, Fortress provides power
from its battery. Fortress uses its lights, two-digit display, and Morse Code alarms to
keep you informed of the UPS status.
If you have a question or problem, please go to
, IBM Service Support. If
you need to contact the manufacturer (Best Power) directly, see the list of Best Power
offices on the next page. You can also get more product information by visiting Best
Power’s World Wide Web site at http://www.bestpower.com.
SAVE THESE INSTRUCTIONS! THIS MANUAL CONTAINS
IMPORTANT INSTRUCTIONS FOR YOUR UPS.
The installation and use of this product must comply with all national, federal, state,
municipal, or local codes that apply. If you need help, please follow the Customer
Process for Service in
, IBM Service Support.
CAUTION
Whenever the UPS is on, there may be dangerous voltage present at the UPS outlets.
This is true because the UPS battery supplies power even if the UPS is not plugged
into the wall outlet. All UPS units contain dangerous voltages. Before maintenance,
repair, or shipment, all connections must be removed; the UPS must be completely
switched off and unplugged or disconnected. The power supply cord is intended to
serve as the AC disconnect. The outlet must be near the equipment and easily acces-
sible.
In UPS models with an input plug, the UPS ground (earth) conductor carries the
leakage current from the loads in addition to any leakage current the UPS generates.
This UPS generates no more than 0.4 mA of leakage current. To limit the total leak-
age to 3.5 mA, the load leakage current must be limited to 3.1 mA. If you do not
know the load leakage current, replace the UPS power cord with a cord that uses a
locking plug with a minimum rating of 10 A (such as IEC 309). If you do not have a
matching receptacle, consult an electrician to install the proper receptacle. The three-
wire receptacle that you plug the UPS into must have a good (low-impedance)
ground (protective earth) connection to provide a safe path for leakage current.
Do not connect or disconnect cables to the battery cabinets while the UPS is on. Do
not connect more than the maximum number of cabinets specified in Startup.
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