5.5 Unbalance parameters
SPM33 can measure current unbalance, the unbalance is calculated:
Xmax
Xmin
-
Xmax
Xunbal
）
（
=
×100
％
Xunbal — The unbalance of the voltage or current
Xmax — Maximum value of the three-phase voltage or current
Xmin — Minimum value of the three-phase voltage or current
5.6 Alarm Setpoint
SPM33 with user definable valued system which can monitor the electrical
parameters of the instrument and set the action. When an alarm event occurs,
the instrument panel ALARM light will flash, meanwhile, the display can be
switched to the alarm interface to see the type of alarm events, or read the type
of alarm through communication, after the elimination of alarm events , ALARM
light will destroy , warning interface will appear as "no."
The object of the alarm type as below:
18