KYORITSU 6315 Instruction Manual - Manual (Page 146)

KEW6315 Items measured at Harmonics measurement
KEW6315 - 144 -
Items measured at Harmonics measurement
Meas. system : Digital PLL synchronization
Meas. method : Analyze harmonics, and then add and display the inter-harmonics
components adjacent to the integral order of the analyzed harmonics
Effective frequency range : 40 - 70Hz
Order analysis : 1 - 50th
Window width : 10-cycle at 50Hz, 12-cycle at 60Hz
Window type : Rectangular
Data analysis : 2048 points
Analyzing rate : once/ 200ms at 50Hz/60Hz
R. m.s. harmonics voltage Vk [Vrms]
Range Same as r.m.s. voltage
Displayed digit Same as r.m.s. voltage
Display range Same as r.m.s. voltage
* rate of content 0.0% - 100.0%, percentage against the basic wave
Measurement
system
Complied with IEC61000-4-30, IEC61000-4-7, IEC61000-2-4
Analysis window width is 10/12-cycle for 50/60Hz, and the measured values
contain the inter-harmonics components adjacent to the analyzed order.
Accuracy Complied with IEC61000-2-4 Class3 where 10% - 100% of input range for
600V Range.
3% or more against 100V of nominal voltage : ±10%rdg
Less than 3% against 100V of nominal voltage : nominal voltage ±0.3%
1000V Range : ±0.2%rdg±0.2%f.s.
Equation
( ) ( ) ( ) ( ) ∑
− =
+ +
+ =
1
1
2 2
10 10
n
i n k c r n k c ck
V V V
1
100
c
ck
V
V
×
=
c: Measurement channel, k: Harmonics of each order
Vr: Real number after Voltage FFT conversion
Vi: Imaginary number after Voltage FFT conversion
Measurement cycle in this equation is 10-cycle. For 12-cycle measurement,
"10k+n" should be replaced with "12k+n”.
1P2W-1 to 4 V
1k
1P3W-1 to 2 V
1k
, V
2k
3P3W-1 to 2 Line voltage V
12k,
V
32k
3P3W3A Line voltage V
12k,
V
23k,
V
31k
3P4W V
1k
, V
2k
, V
3k
Rate of
content