4 Measured Quantities and Recording
4.1 Power Quality Measuring System and Recording System
32 SICAM Q100, 7KG95xx, Device Manual
E50417-H1040-C522-A4, Edition 03.2018
4.1.4 Mains Signalling Voltage
Mains signalling voltage (MSV) measurement is performed according to IEC 61000-4-30.
SICAM Q100 detects mains singalling frequencies from 100 Hz to 3 kHz. The threshold for detection and
capture is from 1 % up to 15 % of Udin.
The following data and values are determined during the evaluation of the mains signalling voltage in SICAM
Q100 and listed in the window Mains signalling voltage (see Chapter 8.4.2.3):
• Time when mains signalling voltage starts to occur (time stamp with date and time)
• The values of the affected phase (a, b, c, ab, bc, ca)
Figure 4-2 Mains Signalling Voltage
Detection threshold
Time
Mains signalling voltage
Zoom
Detection threshold
Time
Mains signalling voltage
Total recording duration
Pre-recording duration
Detected time stamp
The mains signalling voltage will be recorded if the instantaneous value of the MSV (on the user-specified carrier
frequency) is higher than a given threshold voltage. The recorder will not end until the Total recording durationis
reached.
The 10/12 cycle values of voltages are recorded. For detailed information on calculation of mains signalling voltage ,
refer to IEC 61000-4-30.
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