Bender B93100735, Manual

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Power Quality
56 PEM735_D00084_02_M_XXEN/06.2020
6.3.8 Mains signalling (ripple control signals)
Mains signalling voltages
Ripple control signals are signals superimposed on the supply voltage for the purpose
of transmitting information in the public supply network and to the premises of net-
work users.
Signals in the public supply network can be classified as follows:
 
Ripple control signals: Superimposed sinusoidal voltage signals in the frequency
range 110…3 000 Hz;
 
Mains marking signals: Superimposed short-term supply voltage variations (tran-
sients) at selected points of the voltage waveform.
Fig. 6.17: Voltage levels of signal frequencies in percent U
n
used in public LV networks
(according to EN 50160)
In some countries the public networks may be used by the network operators for the
transmission of signals. For 99 % of a day the 3 s mean value of the signal voltages must
be less or equal to the values given in Fig. 6.17.
PEM735 can detect the voltage of the signals for three different frequency ranges. The
limits of the voltages for these frequencies are stored in the device according to
Fig. 6.17. The frequency range is limited to 3 kHz.
Frequency [kHz]
1
10
1 10 0,1 100
Signal voltage [% of
U
n
]