AEMC PowerPad 3945-B, Руководство пользователя, Страница: 99 / 108

Power Quality Analyzer Model 3945-B
97
Ratios
PF[ i ] = i + 1 phase power factor
W[ i ]
VA[
i
]
DPF[ i ] = cos( φ [ i ]) i + 1 phase displacement factor
Tan[ i ] = tan( φ [ i ]) i + 1 phase tangent
PF[3] =
PF[0] + PF[1] + PF[2]
3
Total power factor
DPF[3] =
DPF[0] + DPF[1] + DPF[2]
3
Total shift factor
Tan[3] =
Tan[0] + Tan[1] + Tan[2]
3
Total tangent
cos( φ [
i
]) =
[][ ]
Cosine angle between voltage
fundamental and i + 1 phase current
NSS-1
0
2
n i VF
[][ ]
n i AF
n
∑
=
[][ ]
NSS-1
0
n i VF
n
∑
=
2
[][ ]
NSS-1
0
n i AF
n
∑
=
.
Various Types of Energy
Wh[0][ i
] =
Active energy consumed phase i + 1
W[ i ]
3600
∑
Tint
VAh[0][ i
] =
Apparent energy consumed phase i + 1
VA[ i ]
3600
∑
Tint
VARhL[0][ i
] =
for VAR[ i ] ≥ 0 Reactive inductive energy consumed phase i + 1
VAR[ i ]
3600
∑
Tint
VARhC[0][
i
] =
for VAR[ i ] ≤ 0
Reactive capacitive energy consumed phase i + 1
3600
∑
Tint
–VAR[ i ]
Total active energy consumed:
Wh[0][3] = Wh[0][0] + Wh[0][1] + Wh[0][2]
Total apparent energy consumed:
VAh[0][3] = VAh[0][0] + VAh[0][1] + VAh[0][2]