KYORITSU 6315 Instruction Manual - Manual (Page 136)

KEW6315 Items measured at Instantaneous measurement
KEW6315 - 134 -
Items measured at Instantaneous measurement
Frequency f [Hz]
Displayed digit 4-digit
Accuracy ±2dgt (40.00Hz - 70.00Hz, V1 Range 10% - 110%, sine wave)
Display range 10.00 - 99.99Hz
Input source V
1
(fix)
10-sec average frequency f10 [Hz]
Displayed digit 4-digit * e.g. averaged frequency values at 10 sec of intervals
Meas. system Complied with IEC61000-4-30
Accuracy ±2dgt (40.00Hz - 70.00Hz, V1 Range 10% - 110%, sine wave)
Display range 10.00 - 99.99Hz
Input source
V
1
(fix)
R.M.S. Voltage V [Vrms]
Range 600.0/1000V
Displayed digit 4-digit
Effective input
range
1% - 120% of Range (rms) and 200% of Range (peak)
Display range 0.15% - 130% of Range (“0” is displayed at less than 0.15%)
Crest factor 3 or less
Meas. system Complied with IEC61000-4-30
Accuracy Assuming that measuring 40-70Hz, sine wave at 600V Range:
10% - 150% against 100V or more of nominal V :Nominal V±0.5%
Out of above range and at 1000V Range
:±0.2%rdg±0.2%f.s.
Input impedance approx 1.67MΩ
Equation
( )












=
∑
−
=
1
0
2
1 n
i
ci c
V
n
V
i : sampling point*
n: number of sampled values at 10 or
12-cycle
c : Measurement channel
* 50Hz: 8192 points in 10 waveforms, 60Hz: 8192 points in 12 waveforms
1P2W-1 to 4
V
1
1P3W-1 to 2
V
1,
V
2
3P3W-1 to 2
Line voltage: V
12 ､
V
23 ､
V
31 =
√ (V
23
^2 + V
12
^2+2×V
23
×V
12
×cosθV)
※ θV=relative angles of V
12
, V
23
3P3W3A
Line voltage:V
12,
V
23,
V
31
3P4W
Phase voltage: V
1,
V
2,
V
3
Line voltage : V
12
= √ ( V
1
^2 + V
2
^2-2×V
1
×V
2
×cosθV
1
)
V
2 3
= √ ( V
2
^2 + V
3
^2-2×V
2
×V
3
×cosθV
2
)
V
31
= √ ( V
3
^2 + V
1
^2-2×V
3
×V
1
×cosθV
3
)
* θV
1
= relative angles of V
1
,V
2
, θV
2
= relative angles of V
2
,V
3
,
θV
1
= relative angles of V
3
,V
1