Version: 2020-09-04
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Exemplary excerpt: Custom Thresholds
This excerpt is an example. Depending on UPS model and manufacturer, this list will vary in naming as well as functionality differs. The
sample list shown below shows the custom threshold list of a XANTO 2000R from the manufacturer Online:
Battery Voltage out of range XX V – XX V Batteries are sensitive to voltages, high voltages and deep discharges can
permanently damage them. This value can be used to warn in good time as the
entered range is left.
Input voltage P-N out of range XX V – XX V on request some UPS systems offer on measurement data of the input voltage. This
value can be used to implement an alarm response to voltage dips or overvoltage on
main power input
UPS Temperature out of range XX°C – XX °C Some UPS systems provide internal temperature sensors to measure device
temperature values. This value can be used to define an additional alarm behavior
based on the temperature values that the UPS supplies.
UPS Autonomy less than XX m in some cases, it may be useful to define additional alarm behavior about the
remaining time a UPS ensure emergency power in autonomous mode - as an
example if defined jobs depends on a configured time delay
and due to several short power outages in a row Time is available:
An emergency behavior scenario could be an alarm shutdown of systems.
Battery Charge less than XX % If a UPS comes back from autonomous operation to normal mode, it will automatically
start to recharge the batteries. This may last some time. In case of several short
power failures in sequence, an additional early warning behavior can be defined using
this value.
Output Load less than XX % Some UPS systems provide real-time measurements of the current load.
In case of the UPS switches to autonomy mode, normally non-vital systems will be
shut down as soon as possible. Due to the fact the output load differs if systems will
be shut down, this value can be useful for confirmation or advisory behavior.
Battery Symmetry Pos./Neg. greater than Some UPS systems use the positive and the negative half wave of AC to charge
batteries. This setting defines the alarm behavior if the positive battery string and the
negative battery string are not loaded evenly.
Seconds on Battery greater than XX s in some cases, a voltage drop is recorded, for example in case of large industrial
plants are put into operation. In some cases, it may happen that a UPS switches to
autonomous mode for one or several seconds. With this value an additional warning
could be realized to verify a "genuine autonomy case".
Note:
Pay close attention to the arguments associated with the thresholds:
Greater than, less than, in range, out of range - since arguments are taken literally as a condition, the warning and alarm behavior will
be done according to the configuration:
As an example, if the output load warning is less than 67%, it will also issue a warning if it drops to 43%. On the other hand, 67% will not
warn due to the fact the value has to be below 67%
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