Siemens Sicam P850 7KG85 Series - Page 39

4 Measurands and Recording
4.1 Measuring and Recording System
39SICAM P850/P855, 7KG85xx, Device Manual
E50417-H1040-C482-A6, Edition 10.2018
4.1.2.4 Event Recorder (Only SICAM P855)
The Event Recorder exclusively records PQ events (undervoltage, overvoltage, voltage interruptions). The use
nominal voltage is the reference value for the analysis.
Figure 4-6 Recording of the Event Recorder, Overvoltage and Undervoltage
Voltage Event
• Dip threshold: 75 % to 95 % (default 90 %)
• Swell threshold: 105 % to 140 % (default 110 %)
• Voltage interruption threshold: 1 % to 10 % (default 5 %)
• Event hysteresis: 1 % to 6 % (default 2 %)
Frequency Event
• Underfrequency threshold: 0.1 % to 5 % (default 1 %)
• Overfrequency threshold: 0.1 % to 5 % (default 1 %)
Voltage Unbalance Event
• Voltage unbalance threshold: 1 % to 5 % (default 5 %)
100
V
rated
[%]
t
108
92
110
90
Voltage dip
Voltage swell
Event
star t
Event
start
Event
stop
Event
stop
t
Duration of
event
Hysteresis
(2 %)
Hysteresis
(2%)
Duration of
event