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Table 621:
Power calculation
Measurement mode setting
Power calculation
PhsA, PhsB, PhsC
S V
I
V
I
V
I
a
a
b
b
c
c
=
⋅
+
+
+
⋅
*
*
*
P
S
=
( )
Re
Arone
S V
I
V
I
ab
a
bc
c
=
⋅
−
⋅
*
*
P
S
=
( )
Re
Pos Seq
S
V I
=
⋅
⋅
3
1
1
*
P
S
=
( )
Re
PhsAB
S
V
I
I
ab
a
b
=
⋅
⋅
−
(
)
3
*
*
P
S
=
( )
Re
PhsBC
S
V
I
I
bc
b
c
=
⋅
⋅
−
(
)
3
*
*
P
S
=
( )
Re
PhsCA
S
V
I
I
ca
c
a
=
⋅
⋅
−
(
)
3
*
*
P
S
=
( )
Re
PhsA
S
V
I
a
a
=
⋅
⋅
3
*
P
S
=
( )
Re
PhsB
S
V
I
b
b
=
⋅
⋅
3
*
P
S
=
( )
Re
PhsC
S
V
I
c
c
=
⋅
⋅
3
*
P
S
=
( )
Re
If all three phase voltages and phase currents are fed to the protection
relay, the positive-sequence alternative is recommended (default).
Depending on the set
Measurement mode
, the power calculation calculates active power,
reactive power and apparent power values from the available set of measurements. The
calculated powers S, P, Q and the power factor angle, PF_ANGL, are available in the
Monitored data.
1MAC059074-MB A
Section 4
Protection functions
615 series ANSI
719
Technical Manual
Содержание Relion 615 series
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