HP PowerTrust A3589A, Руководство пользователя

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1-6 Chapter 1
Overview
Terms Used in this Manual
rear panel The rear panel of the Electronics Unit and Service Bypass Unit. See
Figure 1-3. The term "rear panel" never refers to the back of the
Battery Box.
Service Bypass Unit A unit located behind the Electronics Unit that can, when set
properly, isolate the AC input source from the Electronics Unit and
the batteries so that those components can be serviced without
disrupting power to the load.
Service Bypass mode The condition the UPS is in when AC input power flows directly to
output receptacles and is cut off to the UPS's Electronics Unit and
batteries. The UPS must be in Service Bypass mode (by switching
the Service Bypass switch to
BYPASS
) when its Electronics Unit or
Battery Box needs to be serviced or replaced. Loss of input power
while the UPS is in this mode results in a complete loss of power to
the connected equipment. For more information, refer to “UPS
Modes”.
Sleep mode The state of the UPS after prolonged disruptions in AC input power
or after it has detected a problem with its internal circuitry. The
UPS may also enter Sleep mode after it has been in Automatic or
Service Bypass mode for more than 30 minutes. In this state, the
UPS uses a minimum of battery power. For more information, about
this mode, refer to “UPS Modes”.
transfer time The very short time it takes the UPS to go to the on battery state
after the external AC power fails or is removed.