108 6LE008146B
Alarm management
7.2 PTA overloadprealarms
1
Overload prealarm icon (PTA 1 only)
Normal load zone Surveillance zone Alert zone
o flashing fixed
I Max 1280A
100
80
60
40
20
%Ir IN I1 I2 I3
PTA
120
1
This alert zone is bounded on one hand by the threshold and time delay of the PTA overload
prealarm and on the other hand by the Ir threshold and tr time delay.
The surveillance zone starts from the PTA threshold.
Display of the PTA prealarm 1:
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