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5530/5520 DataNode Setup
Demand values are computed as the average value over the
demand interval, which can be programmed as a different
value than the periodic readings. The following parameter
values can be enabled: individual phase and three phase
total real power demand, reactive demand, apparent power
demand, average PF and peak real power values.
Under ENABLE TRENDING (THIS PAGE) is a checkbox
in the value field opposite Demand. The box enables the
trending of values listed in Demand page. If the box is
checked, the settings on the page go into effect. If the box
is not checked, the remaining settings are persisted but are
not in effect.
The following parameter values can be enabled under
SELECT THE JOURNAL ENTRY/ENTRIES TO
CHANGE: individual phase and three phase total real
power demand, reactive demand, apparent power demand,
average PF, and peak real power values.
Highlight the parameter value you wish to change, then
check the Enable periodic sampling box. Check the
threshold enable box, and then enter the value for that
threshold. Repeat this for all parameters of interest.
High limit - specifices an absolute limit for comparison
that is higher than the low limit
Low limit - specifies an absolute limit for comparison
that is lower than the high limit
Low-Low limit - specifies an absolute limit for
comparison lower than the low limit
Deadband limit - specifies how much a value can change
before another event is recorded
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The High-High must be greater than High, Low-Low less
than Low. Deadband is the equivalent of sensitivity. The
hysteresis values assigned to limits are set by the system.
All limit values are used to determine if corresponding
reporting or logging action should take place. Note that
these limits are the absolute or actual values to trigger on,
not a percent of fixed or floating base as can be used in
Voltage RMS Variation and Transients limits.
For example, if Real Power Demand is detected to cross
the threshold limit, then an event is recorded. If the Real
Power Demand goes from out of limits to within limits
(that is below the high limit minus the hysteresis and
above the low limit plus the hysteresis), then the event is
recorded.
Each parameter has five threshold limits: High-high,
High, Low, Low-Low, and Deadband.
High-High limit - specifies an absolute limit for
comparison that is higher than the high limit
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