hager hw+ - 7.5 Optional alarms

112 6LE008146B
Alarm management
7.5 Optional alarms
Optional alarms make it possible to monitor any measuring event detected by the sentinel
Energy trip unit.
It is possible to define up to 12 alarms for a single trip unit. Each alarm is dedicated to
monitoring a single measurement.
An optional alarm is defined through the following parameters:
- Measurement monitored,
- Activation threshold,
- Deactivation threshold,
- Activation time delay,
- Deactivation time delay,
- Priority level.
Activation condition for custom alarms
Activation of a custom alarm results from one of the following conditions:
- Positive crossing of a threshold condition,
- Negative crossing of a threshold condition,
- Equal to a measured value.
Activation by positive crossing
In the case of a positive crossing of a threshold, activation of the alarm is dependent on the
activation threshold being positively crossed.
ON
T1
T2
t
S2
S1
Alarm function
ON
OFF
Upper crossing
Symbol Meaning
s1 Activation threshold
s2 Deactivation threshold
T1 Activation time delay
T2 Deactivation time delay