User Manual

78
Quantities concerning the spectral composition of the signals
Measurement
Measurement range
Display resolution Maximum intrinsic error
Minimum Maximum
Voltage harmonic ratio (τ
n
) 0 %
1500 %f
100 %r
0.1 %
τ
n
< 1000 %
±(2.5 % + 5 ct)
1 %
τ
n
≥ 1000 %
Current harmonic ratio (τ
n
)
(non-FLEX)
0 %
1500 %f
100 %r
0.1 %
τ
n
< 1000 %
±(2 % + (n × 0.2 %) + 10 ct)
n ≤ 25
1 %
τ
n
≥ 1000 %
±(2 % + (n × 0.6 %) + 5 ct)
n > 25
Current harmonic ratio (τ
n
)
(AmpFLEX™ & MiniFLEX)
0 %
1500 %f
100 %r
0.1 %
τ
n
< 1000 %
±(2 % + (n × 0.3 %) + 5 ct)
n ≤ 25
1 %
τ
n
≥ 1000 %
±(2 % + (n × 0.6 %) + 5 ct)
n > 25
Total voltage harmonic distortion (THD)
(referred to the fundamental) of voltage
0 % 999.9 % 0.1 % ±(2.5 % + 5 ct)
Total current harmonic distortion (THD)
(referred to the fundamental) of current
(non-FLEX)
0 % 999.9 % 0.1 %
±(2.5 % + 5 ct)
if ∀ n ≥ 1. τ
n
≤ (100 ÷ n) [%]
or
±(2 % + (n
max
× 0.2 %) + 5 ct)
n
max
≤ 25
±(2 % + (n
max
× 0.5 %) + 5 ct)
n
max
> 25
Total current harmonic distortion (THD)
(referred to the fundamental) of current
(AmpFLEX™ & MiniFLEX)
0 % 999.9 % 0.1 %
±(2.5 % + 5 ct)
if ∀ n ≥ 1. τ
n
≤ (100 ÷ n
2
) [%]
or
±(2 % + (n
max
× 0.3 %) + 5 ct)
n
max
≤ 25
±(2 % + (n
max
× 0.6 %) + 5 ct)
n
max
> 25
Total voltage harmonic distortion (THD)
(referred to the signal without DC) of
voltage
0 % 100 % 0.1 % ±(2.5 % + 5 ct)
Total current harmonic distortion (THD)
(referred to the signal without DC) of
current (non-FLEX)
0 % 100 % 0.1 %
±(2.5 % + 5 ct)
if ∀ n ≥ 1. τ
n
≤ (100 ÷ n) [%]
or
±(2 % + (n
max
× 0.2 %) + 5 ct)
n
max
≤ 25
±(2 % + (n
max
× 0.5 %) + 5 ct)
n
max
> 25
Total current harmonic distortion (THD)
(referred to the signal without DC) of
current (AmpFLEX™ & MiniFLEX)
0 % 100 % 0.1 %
±(2.5 % + 5 ct)
if ∀ n ≥ 1. τ
n
≤ (100 ÷ n
2
) [%]
or
±(2 % + (n
max
× 0.3 %) + 5 ct)
n
max
≤ 25
±(2 % + (n
max
× 0.6 %) + 5 ct)
n
max
> 25
Harmonic loss factor (FHL) 1 99.99 0.01
±(5 % + (n
max
× 0.4 %) + 5 ct)
n
max
≤ 25
±(10 % + (n
max
× 0.7 %) + 5 ct)
n
max
> 25
K factor (FK) 1 99.99 0.01
±(5 % + (n
max
× 0.4 %) + 5 ct)
n
max
≤ 25
±(10 % + (n
max
× 0.7 %) + 5 ct)
n
max
> 25
Phase shifts of harmonics (order ≥ 2) -179° 180° 1° ±(1.5° + 1° x (n ÷ 12.5)
Note : n
max
is the highest order for which the harmonic ratio is non-zero.