CET Electric Technology
36
4.3.8.4 Screen Captures of Harmonics Measurements
Figure 4-6 Harmonic Measurements Display on Front Panel
4.3.9 Mains Signalling Voltage (MSV)
As per 5.10 of IEC 61000-4-30:
Mains Signaling Voltage is RMS voltage of mains signal.
Mains signaling voltage measurement shall be based on
Either the corresponding 10/12-cycle r.m.s. value interharmonic bin
Or the r.m.s. of the four nearest 10/12-cycle r.m.s. value interharmonic bins
The beginning of a signaling emission shall be detected when the measured value of the concerned interharmonic exceeds a
threshold. The measured values are recorded during a period of time specified by the user, in order to give the level and the
sequence of the signal voltage.
The user must select a detection threshold above 0.1% U
din
as well as the length of the recording period up to 120s.
The PMC-690 provides 3 groups of waveform recorder for MSV in accordance with Section 5.10 of IEC
61000-4-30 Standard for Class A performance. Each MSV WR will be recorded in SOE Log and EN50160
report.
The MSV provides the following setup parameters which can be programmed through the Front Panel
or communication:
Setup Parameter
Value
MSV #x Enable
0 = Enable, 1 = Disable, default=0
MSV #x Frequency
50 Hz: 600 to 30000 (x0.1Hz), 60 Hz: 700 to 30000 (x0.1Hz), default=10000
MSV #x Limit
3 to 1000 (x0.001Udin), default=50 (x0.001Udin)
Table 4-15 Mains Signal Voltage Setup Parameters
4.3.10 Voltage Deviation
As per Section 5.12 of IEC 61000-4-30:
The 10/12-cycle r.m.s value Urms can be used to assess the underdeviation and overdeviation parameters in per cent of Udin. The
underdeviation Uunder and overdeviation Uover parameters are determined by the following equations. w:
Voltage Overdeviation (%)
U
over
= 0
if
U
rms
<
U
din
U
over
= ((
U
rms
-
U
din
) /
U
din
) x 100%
if
U
rms
≥
U
din
Voltage Underdeviation (%)
U
under
= 0
if
U
rms
>
U
din
U
under
= ((
U
din
-
U
rms
) /
U
din
) x 100%
if
U
rms
≤
U
din
The PMC-690 is capable of measuring Voltage accurate to 0.1% and monitoring Voltage deviation on
line. In addition, the Voltage deviation can be set as setpoint. The following screen captures illustrates
Содержание PMC-690
Страница 1: ...PMC 690 Hand Held Power Quality Analyzer User Manual Version V1 0A Aug 27 2018...
Страница 21: ...CET Electric Technology 21 Energy Demand Harmonics Spectrum Table Power...
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