hager h3+ - Page 64

64 6LE005550A
Function of the Energy trip unit
3.4 Managing alarms and logs
Activation by negative breach
In the case of a negative breach of a threshold, activation of the alarm is dependent
on the activation threshold being negatively breached.
ON
t
S1
T1
T2
S2
Lower breach
Symbol Meaning
S1 Activation threshold
S2 Deactivation threshold
T1 Activation time delay
T2 Deactivation time delay
Activation due to equal levels
For the equal value condition, the alarm is activated when the value measured is the
same as the activation value. The activation threshold is the same as the activation
value.
T1
T2
ON
Quadrant
t
S2
S1
Breach due to equal levels