YOKOGAWA CW500, Руководство по началу работы, Страница: 84 / 87

61
IM CW500-02EN
Flicker
Displayed Items Pst calc. time:
V:
Pst(1min):
Pst:
Plt:
Maximum Pst:
Maximum Plt:
Time remaining until the calculation of next Pst
Rms voltage per half wave, average over 1 s
Flicker value over 1 minute (Pst reference)
Short-term (10 minute) flicker severity
Long-term (2 hour) flicker severity
Pst maximum and update time
Plt maximum and update time
Pst(1min) trend graph of the most recent 120 minutes
Plt trend graph of the most recent 600 hours
Display digits 4 digits Resolution: 1024 divisions of logarithmic 0.001 to 6400
P.U.
Ramp model 230 V ramp/220 V ramp/120 V ramp/100 V ramp
Measurement
system
Complies with IEC61000-4-30 and IEC61000-4-15 Ed.2
Accuracy Pst (max. 20) according to the test method of IEC61000-4-15
Ed. 2 Class F3: ±10% rdg
Equation
Pst(1min)
c
,
Pst
c
=
S S S S
P P P P P
50 10 3 1 1 . 0
08 . 0 28 . 0 657 0 . 0 525 0 . 0 0314 . 0 × + × + × + × + ×
V
1S
= (P
0.7
+P
1
+P
1.5
) / 3
,
V
3S
= (P
2.2
+P
3
+P
4
) / 3
,
V
10S
= (P
6
+P
8
+P
10
+P
13
+P
17
) / 5
,
V
50S
= (P
30
+P
50
+P
80
) / 3 c: measurement channel
Cumulative probability function (CPF) is determined by nonlinearly classifying a
measurement over 10 minutes * into 1024 classes (0 to 6400 P.U.).
This is corrected using a nonlinear interpolation method, smoothed, and
calculated.
*
Pst(1min) is 1 minute.
N
Pst
Plt
N
i
i
C
∑
=
× =
1
3
3
c: measurement channel, N: 12 times (2 hour measurement)
1P2W-1 to 4
Pst(1min)
1
,
Pst
1
,
Plt
1
1P3W-1, 2
Pst(1min)
1
,
Pst
1
,
Plt
1
,
Pst(1min)
2
,
Pst
2
,
Plt
2
3P3W-1, 2
Line voltage Pst(1min)
12
,
Pst
12
,
Plt
12
,
Pst(1min)
32
,
Pst
32
,
Plt
32
3P3W3A
Line voltage Pst(1min)
12
,
Pst
12
,
Plt
12
,
Pst(1min)
23
,
Pst
23
,
Plt
23
,
Pst(1min)
31
,
Pst
31
,
Plt
31
3P4W
Pst(1min)
1
,
Pst
1
,
Plt
1
,
Pst(1min)
2
,
Pst
2
,
Plt
2
,
Pst(1min)
3
,
Pst
3
,
Plt
3
Specifications