ABB Relion 620 Series, Technical Manual

Page: 737 / 1224

Table 699: Power calculation
Measurement mode setting Power calculation
PhsA, PhsB, PhsC
S U I U I U I
a a b b c c
= ⋅ + + + ⋅
* * *
P S
=
( )
Re
Arone
S U I U I
ab a bc c
= ⋅ − ⋅
* *
P S
=
( )
Re
Pos Seq
S U I
= ⋅ ⋅
3
1 1
*
P S
=
( )
Re
PhsAB
S U I I
ab
a b
= ⋅ ⋅ −
( )
3
* *
P S
=
( )
Re
PhsBC
S U I I
bc
b c
= ⋅ ⋅ −
( )
3
* *
P S =
( )
Re
PhsCA
S U I I
ca
c a
= ⋅ ⋅ −
( )
3
* *
P S =
( )
Re
PhsA
S U I
a a
= ⋅ ⋅
3
*
P S =
( )
Re
PhsB
S U I
b b
= ⋅ ⋅
3
*
P S
=
( )
Re
PhsC
S U 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.
The calculated powers S, P, Q and the power factor angle PF_ANGL are available in
the Monitored data view.
1MRS757644 H Protection functions
620 series
Technical Manual
737