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Appendix D. Glossary
Advanced Battery Management (ABM)
Backup time
Bypass AC source
Frequency converter
HE mode
Load
Low-battery warning
Manual bypass
Normal AC source
Online mode
Relay contacts
UPS
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A three-stage charging system designed to prolong the service life of
Lenovo UPS batteries. By charging the batteries only when necessary,
battery life is significantly improved. Charging stage one: quickly recharges
battery to approximately 90% of capacity. Charging stage two: fully charges
the battery to 100%. Charging stage three: rest mode prevents
overcharging. Charging stage one is initiated after a power outage or
periodic UPS self-test.
Time during which the load can be supplied by the UPS operating on
battery power.
Alternate source of power for the UPS, used when the UPS is in Bypass
mode.
Operating mode used to convert the AC-power frequency between the UPS
input and output (50Hz → 60Hz or 60Hz → 50Hz).
Operating mode by which the load is supplied directly by the Bypass AC
source if it is within the tolerances defined by the user. This mode
eliminates the double conversion, which reduces the consumption of
electrical power but introduces a switching delay.
Devices or equipment connected to the UPS output.
A battery level indicating that battery power is low and that action should
be taken to prevent the imminent disruption of power to the load.
Mechanical rotary switch used to connect the loads directly to the Bypass
AC source, enabling UPS maintenance without interrupting power to the
load.
Normal source of power for the UPS, used when the UPS is in Online
mode.
The normal UPS operating mode in which the normal AC source supplies
the UPS. This in turn connects AC to DC and then connects DC to AC,
which supplies the connected load.
Contacts supplying information to external equipment in the form of
signals.
Uninterruptible Power System.
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