Hitachi Relion 670 Series Applications Manual page 91

1MRK511407-UUS Rev. N
IEC140000126 V2 EN-US
Figure 39:
Figure 40
two different SMAI blocks are connected to different PHASORREPORT blocks with different instance
numbers. In this example, as the PHASORREPORT blocks have different instance numbers and different
settings for SvcClass and ReportRate, a separate SMAI block is used for each PHASORREPORT block.
IEC140000127 V2 EN-US
Figure 40:
Figure 41
the same SMAI block is connected to different PHASORREPORT blocks with different instance numbers.
Such connection will be only correct if both connected PHASORREPORT blocks have similar settings for
SvcClass and ReportRate. If settings for PMUREPORT instances differ for SvcClass or ReportRate, then
PHASOR1 connection in PHASORREPORT1 instance 2 will not be compliant with IEEE C37.118
standard. The reason is that the filtering in SMAI/3PHSUM block is adapted according to the
performance class (SvcClass) and reporting rate of the connected instance of PHASORREPORT
function block. In this example, SMAI1 will adapt its filtering according to PHASORREPORT instance 1
(because of higher priority) and therefore PHASORREPORT instance 2 will receive data which does not
match its performance class and report rate.
Phasor measurement unit RES670
Application manual
PMUREPORT settings in PCM600 PST
shows an example of correct connection of SMAI and PHASORREPORT blocks in ACT where
An example of correct connection of SMAI and PHASORREPORT blocks in ACT
shows an example of wrong connection of SMAI and PHASORREPORT blocks in ACT where
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Wide area measurement system
IEC140000126-2-en.vsd
IEC140000127-2-en.vsd
Section 6
85