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8.1.4 Peak Factors for Current and Voltage
max(Vpp
[]
=
Vcf
i
1
NSC
max(Upp
[]
=
Ucf
i
1
NSC
max(App
[]
=
Acf
i
1
NSC
8.1.5 1 sec RMS values for voltage and current
[]
=
Vrms
i
[]
=
Urms
i
[]
=
Arms
i
NSS: number of samples in a second (multiple of NSAMPER)
8.1.6 Voltage and Current Unbalance
1
=
V
(VF[0] + a VF[1] + a
+
3
1
=
V
(VF[0] + a
-
3
Vrms
-
Vunb =
Vrms
+
Power Quality Analyzer Model 3945
[]
[]
, i
Vpm
) i
−
1
NSC
[][ ]
∑
⋅
V
=
n
0
[]
[]
, i
Upm
) i
−
NSC
1
[][ ]
∑
⋅
U
=
0
n
[]
[]
, i
Apm
) i
−
1
NSC
[][ ]
∑
⋅
A
=
n
0
−
NSS
1
1
∑
⋅
V
NSS
=
n
0
−
NSS
1
1
∑
⋅
U
NSS
=
n
0
−
NSS
1
1
∑
⋅
A
NSS
=
0
n
2
VF[2]) Direct voltage (complex notation a = e
2
VF[1] + a VF[2]) Reverse voltage
Arms
, Aunb =
Arms
Peak factor single voltage i + 1 phase
2
i
n
Peak factor phase-phase voltage i + 1 phase
2
i
n
Peak factor current i + 1 phase
2
i
n
[][ ]
2
Single rms voltage i + 1 phase
i
n
[][ ]
2
Compound rms voltage i + 1 phase
i
n
[][ ]
2
Rms current i + 1 phase
i
n
-
+
j 2π
)
3
81
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