Lenovo 5594-5KX, Installation And User Manual

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Appendix D. Glossary
Advanced Battery Management (ABM)
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.
Backup time
Time during which the load can be supplied by the UPS operating on
battery power.
Bypass AC source
Alternate source of power for the UPS, used when the UPS is in Bypass
mode.
Frequency converter
Operating mode used to convert the AC-power frequency between the UPS
input and output (50Hz
→
60Hz or 60Hz
→
50Hz).
HE mode
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.
Load Devices or equipment connected to the UPS output.
Low-battery warning
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.
Manual bypass
Mechanical rotary switch used to connect the loads directly to the Bypass
AC source, enabling UPS maintenance without interrupting power to the
load.
Normal AC source
Normal source of power for the UPS, used when the UPS is in Online
mode.
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.
Relay contacts
Contacts supplying information to external equipment in the form of
signals.
UPS Uninterruptible Power System.
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