Flicker, Npst plt – KYORITSU 6315 Instruction Manual User Manual
Page 153
Items measured at Power quality measurement
KEW6315
- 151 -
KEW6315
Flicker
Displayed
items
Time left:
V:
Pst(1min):
Pst:
Plt:
Max Pst:
Max Plt:
Counted down time until a Pst calculation completes.
r.m.s. voltage per half-wave, 1 sec average
Flicker value for 1 min (Pst ref. value)
Severity of short term flicker (10 min)
Severity of long term flicker (2 hours)
Max value of Pst, and time information
Max value of Plt, and time information
Pst(1min) Latest trend graph (for the recent 120 min)
Plt trend graph for the recent 600 hours
Displayed digit
4-digit, Resolution: log 0.001 - 6400 P.U. in 1024-split
Ramp model
230VRamp/220VRamp/120VRamp/100VRamp
Meas. method
Complied with IEC61000-4-30 and IEC61000-4-15 Ed.2
Accuracy
Pst (max. 20):±10%rdg according to the test method defined by IEC61000-4-15 Ed.2
Class F3.
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
Ч
+
Ч
+
Ч
+
Ч
+
Ч
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
The 10-min* measurement data is classfied into 1024 classes (0 - 6400P.U.), using the non-linear
classification, to determine the culamitive probability function (CPF). It will be then corrected by the
non-linear interpolating method, and do the calculation with the smoothed values. * Pst(1min): 1 min
N
Pst
Plt
N
i
i
C
∑
=
×
=
1
3
3
c: Measurement channel, N:12 times(2-hour meas.)
1P2W-1 to 4
Pst(1min)
1
, Pst
1 ,
Plt
1
1P3W-1 to 2
Pst(1min)
1,
Pst
1 ,
Plt
1 ,
Pst(1min)
2,
Pst
2 ,
Plt
2
3P3W-1 to 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