Basler BE1-11g Instruction Manual page 377

9424200994 Rev U
= + +
Vars Vars Vars
φ
3 A B
φ = ∠ − ∠
where:
V I
P PN X
For Sensing Type: Three-wire
In three-wire sensing mode, the equivalent LN voltages are determined from the LL voltages assuming
3V = 0V. This allows per-phase watts and vars to be determined and provides improved accuracy over a
0
two-element method when neutral current is present.
V ˆ V ˆ V ˆ
= ⋅ −
1 3 / ( )
AN AB CA
Using the computed PN voltages, watts and vars are then computed using the equations listed under
four-wire sensing type, above.
For Single Phase Sensing Types: AN, BN, CN, AB, BC, CA
In single-phase sensing mode, the unknown PN voltages are calculated. Assuming a balanced three-
phase voltage is applied, the unknown PN voltages can be determined by scaling and rotating the
measured voltage as follows:
ABC Rotation
=
AN Sensing:
V V
BN AN
=
BN Sensing:
V V
AN BN
=
CN Sensing:
V V
AN CN
1
=
AB Sensing:
V
AN
3
1
=
BC Sensing:
V
AN
3
1
=
CA Sensing:
V
AN
3
ACB Rotation
=
AN Sensing:
V V
BN AN
=
BN Sensing:
V V
AN BN
=
CN Sensing:
V V
AN CN
1
=
AB Sensing:
V
AN
3
1
=
BC Sensing:
V
AN
3
1
=
CA Sensing:
V
AN
3
Using both the measured and calculated PN voltages, watts and vars are then computed using the
equations listed under four-wire sensing type above.
BE1-11g
Vars
C
V ˆ
= ⋅
1 3 / (
BN
⋅ ∠ − °
1 120 V
⋅ ∠ °
1 120 V
⋅ ∠ − °
1 120 V
⋅ ∠ − °
V 1 30 V
AB
⋅ ∠ °
V 1 90 V
AB
⋅ ∠ − °
V 1 150 V
AB
⋅ ∠ °
1 120 V
⋅ ∠ − °
1 120 V
⋅ ∠ °
1 120 V
⋅ ∠ °
V 1 30 V
AB
⋅ ∠ − °
V 1 90 V
AB
⋅ ∠ °
V 1 150 V
AB
V ˆ V ˆ
−
)
BC AB
= ⋅ ∠ °
V 1 120
CN AN
= ⋅ ∠ − °
V 1 120
CN BN
= ⋅ ∠ °
V 1 120
BN CN
1
= ⋅ ∠ − °
V 1 150
BN AB
3
1
= ⋅ ∠ − °
V 1 30
BN AB
3
1
= ⋅ ∠ °
V 1 90
BN AB
3
= ⋅ ∠ − °
V 1 120
CN AN
= ⋅ ∠ °
V 1 120
CN BN
= ⋅ ∠ − °
V 1 120
BN CN
1
= ⋅ ∠ °
V 1 150
BN AB
3
1
= ⋅ ∠ °
V 1 30
BN AB
3
1
= ⋅ ∠ − °
V 1 90
BN AB
3
V ˆ V ˆ V ˆ
= ⋅ −
1 3 / ( )
CN CA BC
1
= ⋅ ∠
V V 1 90
CN AB
3
1
= ⋅ ∠ −
V V 1
CN AB
3
1
= ⋅ ∠ −
V V 1
CN AB
3
1
= ⋅ ∠ −
V V 1
CN AB
3
1
= ⋅ ∠
V V 1 150
CN AB
3
1
= ⋅ ∠
V V 1 30
CN AB
3
Configuration
365
°
°
150
°
30
°
90
°
°