Measurements Cvmmxn - ABB Relion 670 Series Technical Reference Manual

1MRK 505 208-UEN B
Y
A >=
pre-set value
Value Reported
(1st)
IEC99000530 V1 EN
Figure 243: Reporting with integral dead-band supervision
13.1.2.2
Technical reference manual
A1 >=
pre-set value
Y2 A1
Value
A
Reported
Y1

Measurements CVMMXN

Mode of operation
The measurement function must be connected to three-phase current and three-
phase voltage input in the configuration tool (group signals), but it is capable to
measure and calculate above mentioned quantities in nine different ways depending
on the available VT inputs connected to the IED. The end user can freely select by
a parameter setting, which one of the nine available measuring modes shall be used
within the function. Available options are summarized in the following table:
Set value for Formula used for complex, three-
parameter phase power calculation
"Mode"
1 L1, L2, L3
= U
S
L 1
EQUATION1385 V1 EN
2 Arone
=
S U
EQUATION1387 V1 EN
3 PosSeq
= ×
S 3
EQUATION1389 V1 EN
Table continues on next page
A2 >=
pre-set value
Y3
A2
Y4
Value
Reported
Value
Reported
Formula used for voltage and
current magnitude calculation
* * *
× I + U × I + U × I U
L 1 L 2 L 2 L 3 L 3
I
EQUATION1386 V1 EN
× - × U
* *
I U I
L L 1 2 L 1 L L 2 3 L 3
(Equation 63)
I
EQUATION1388 V1 EN
× * U
U I
PosSeq PosSeq
(Equation 65)
I
EQUATION1390 V1 EN
Section 13
Monitoring
A3 + A4 + A5 + A6 + A7 >=
pre-set value
A4
A6
A5
A7
A3
Y5
Value
Reported
99000530.vsd
Comment
= + +
( U U U ) / 3
L 1 L 2 L 3
= + +
( I I I ) / 3
L 1 L 2 L 3
= +
( U U ) / 2
L L 1 2 L L 2 3
= +
( I I ) / 2
L 1 L 3
(Equation 64)
= ×
3 U
PosSeq
=
I
PosSeq
(Equation 66)
t
Used when
three phase-
to-earth
voltages are
available
Used when
three two
phase-to-
phase
voltages are
available
Used when
only
symmetrical
three phase
power shall
be measured
469