Measurements Cvmmxn - ABB Relion Technical Manual

1MRK 502 048-UUS A
IEC99000530 V1 EN
Figure 244: Reporting with integral dead-band supervision
14.1.8.2
Technical manual
reported and set as a new base for the following measurements (as well as for the values
Y3, Y4 and Y5).
The integral dead-band supervision is particularly suitable for monitoring signals with
small variations that can last for relatively long periods.
A1 >=
Y
pre-set value
A >=
pre-set value
Y2
Value Reported
(1st)
A
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:
A2 >=
pre-set value
Y3
A1
Value
Value
Reported
Reported
A3 + A4 + A5 + A6 + A7 >=
pre-set value
A2
A4
Y4
A5
A3
Value
Reported
Section 14
Monitoring
A6
A7
Y5
Value
Reported
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