ION 7500 / ION 7600 User’s Guide

Mains Signaling Voltage

 

 

Mains Signaling Voltage

In some countries, power transmission and distribution systems are also used to carry communication signals. If the magnitude of these signals becomes too large, they have the potential to interfere with the operation of electrical equipment in much the same way that excessive harmonic and interharmonic voltages do. The purpose of this measurement component is to ensure that these signals do not exceed defined levels. EN 50160 defines three types of mains signals:

1.Ripple control: frequencies between 110 to 3000 Hz

2.Power line carrier: frequencies between 3 to 148.5 kHz

3.Marking signals: short transients superimposed at select points on the voltage waveform

The meter can monitor ripple control signals between 110 Hz and 3000 Hz. The meter performs signaling voltage measurements using interharmonic voltages near the user-defined signaling frequencies. You can specify three frequencies to be monitored; the default is 1060Hz.

NOTE

Some common ripple control frequencies in Europe include 183 Hz, 191 Hz, 425 Hz and 1060 Hz.

The signaling voltage measurement is the mean voltage (not RMS) over a fixed interval of 3 seconds.

Observation period of one day with fixed steps of 3 seconds.

N = number of 3-second intervals in which the supply voltage is within ±15% of nominal.

N1 = number of intervals in which the mean value of the signalling voltage exceeds the curve defined in the EN 50160 standard and the supply voltage is within ±15% of nominal.

Mains signaling voltage complies with the standard if N1/N <= 1% during the observation period (1 day by default).

EN 50160 data (current observation period): the meter generates the N and N1 counts for each phase as described above. These counters are reset at the beginning of the next observation period.

EN 50160 data (previous observation period): the meter stores the N and N1 counter values at the end of each observation period before these counters are reset. These 6 registers are also stored in a data recorder for each observation period.

Events: the meter creates a message in the Event log every time the N1 counter for each phase increases.

Power Quality: ION Meters and EN50160 Technical Note

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Multi-Tech Systems 7500, 7600 manual Mains Signaling Voltage
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7500, 7600 specifications

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