SATEC SA300 ezPAC Operation Manual - Manual (Page 102)

Chapter 8 Configuring Recorders Configuring the EN50160 Power Quality Recorder
102 SA300 Substation Automation Unit
Interharmonic Voltage
Method of Evaluation
Since the EN50160 does not specify target limits for interharmonic voltages, this
feature is normally disabled. You can enable evaluation of interharmonic voltages via
the EN50160 Advanced Setup.
The basic measurements are the individual interharmonic voltage distortion factors
(HD) and the total interharmonic distortion factor (THD) over a period of 10 minutes
under normal operating conditions.
Interharmonic voltages are evaluated by instrumentation complying with IEC 61000-
4-7. All calculations are made relative to the nominal voltage.
The highest harmonic order for evaluating individual interharmonic voltages and
interharmonic THD can be selected in the device in the range of 25 to 50 via the
EN50160 Advanced setup.
Interharmonic voltages are not evaluated if the supply voltage crosses a voltage
tolerance limit (
±15% Un).
Target Values
The EN50160 does not provide target limits for interharmonic voltages. The ranges of
interharmonic voltages selected in the SA300 are:
Interharmonic THD ≤ 2 % for 95% of a week
Individual interharmonic voltages shall be less than or equal to the values given in
the following table for 95% of a week.
Interharmonic order Relative Voltage
2 0.2
3-15 1.0
16-25 0.5
You can change the compliance limit for the interharmonic THD via the EN50160 PQ
Recorder setup. The individual interharmonic voltage limits are changed via the
EN50160 Harmonics setup.
Mains Signaling Voltage
This characteristic defines the magnitude of the signal voltages used in some
countries for signal transmission over public supply networks. These may include
ripple control signals in a frequency range from 100 HZ to 3 kHz, and carrier wave
communications signals in a frequency range from 3 kHz to 148.5 kHz.
The SA300 evaluates ripple control signaling voltages in a frequency range from
100 Hz to 3 kHz.
Method of Evaluation
Since evaluating signal voltages is not commonly used, this feature is normally
disabled. You can enable evaluation of signaling voltages via the EN50160 Advanced
Setup.
The SA300 can evaluate up to four ripple control frequencies. You can select the
required signaling frequencies via the EN50160 Advanced Setup.
The basic measurement is the magnitude of the signaling voltage over a period of 3
seconds under normal operating conditions.
Signaling voltages are not evaluated if the supply voltage crosses a voltage tolerance
limit (
±15% Un).
Target Values
The voltage levels given by the EN50160 in Figure 1 of Clause 2.13 are taken from
the so-called “Meister-curve” which defines the maximum permissible ripple control
voltages in LV networks.