User's Manual

54 Meter Operation
Old
Command
New
Command
Comments
and remains at that level until the switch duration expires.
In the past In the future The meter is already using the Secondary Maximum Power Level
Threshold when the new command is received. Since the meter is to
ignore the old command and only follow the new command (which isn’t
active yet), it will immediately switch back to the Primary Maximum
Power Level Threshold. The new command will be executed at its
specified start time for its specified duration.
In the past In the past The meter is already using the Secondary Maximum Power Level
Threshold when the new command is received. Since the meter is
supposed to use the Secondary Maximum Power Level Threshold per
the new command, it will continue to do so. The switch duration will be
reset to use the entire duration specified for the new command.
For example, consider a case where the meter is evaluating at the
Secondary Maximum Power Level Threshold and is supposed to switch
back to the Primary trip point at 11:00 A.M, per the old command. If
the meter receives the new command at 10:00 A.M with a start time of
9:00 A.M. and a switch duration of 4 hours, the meter will switch back
to the Primary Maximum Power Level Threshold at 2:00 P.M, 4 hours
after receiving the new command.
Primary and Secondary Maximum Power Duration
Thresholds
The meter contains both a Primary Maximum Power Duration Threshold and a
Secondary Maximum Power Duration Threshold value. The Primary Maximum
Power Duration Threshold is used when the Primary Power Level Threshold value is
in use, and the Secondary Maximum Power Duration Threshold is used when the
Secondary Power Level Threshold is in use.
This setting determines the duration (in minutes) that the active Maximum Power
Level Threshold, or the Power Threshold on Exhausted Credit (described below),
must be continuously met or exceeded for the load disconnect contactor to turn off. If
the power drops below the level threshold, the duration is reset and starts counting
again from zero when the power exceeds the level threshold again. When set to 0, the
disconnect turns off immediately when the power value threshold is reached. The
range is 0 to 255 minutes.
After the disconnect is shut off due to exceeding the power threshold settings, if the
power threshold is still being exceeded after manual re-latching of the load
disconnect, the disconnect will turn-off again in less than 1 minute.
Disconnect Power Trip Point Source
You can specify the active power level to act as the source for the disconnect power
trip point source. The power value selected can be either the active forward and
active reverse energy, or active forward energy only.