Basler BE3-GPR - Page 38

Functional Description
3-3
For phase B and neutral ground fault current sensing:
I
I
num
B
Bn
2
n=1
num
=
∑
I
I
num
NGF
NGFn
2
n=1
num
=
∑
For phase A, B, and C current sensing:
I
I
num
A
An
2
n=1
num
=
∑
I
I
num
B
Bn
2
n=1
num
=
∑
I
I
num
C
Cn
2
n=1
num
=
∑
For single phase or 3 phase 3 wire sensing:
V
V
num
LL
n
2
n=1
num
=
∑
P
VI
num
nn
n=1
num
=
⋅⋅
∑
3
For 3 phase 4 wire sensing:
V
V
num
LN
n
2
n=1
num
=
∑
P
VI
num
nn
n=1
num
=
⋅⋅
∑
3
For phase balance:
V VV V
AB A A B B
2
=+ +
V
2
V VV V
BC B B C C
2
=+ +
V
2
V VV V
CA C C A A
2
=+ +
V
2
Power Factor:
PF =
P
VA
where:
VA = V I
B
⋅
Power Angle:
φ
= cos (PF)
-1
Reactive Current:
I= Isin
RB
⋅
φ
Reverse Power:
P = 3 V I cos
RABB
⋅⋅
⋅
φ
I
NGF
: Neutral Ground Fault