ABB Relion 670 series - PMU Report Function Blocks Connection Rules in PCM600 Application Configuration Tool (ACT)

6.2.3.4 PMU Report Function Blocks Connection Rules in PCM600 Application
Configuration Tool (ACT)
There are 3 important general rules which have to be considered in PCM600 ACT for the
connection of preprocessor blocks (SMAI) and 3PHSUM blocks to PHASORREPORT
blocks:
Rule 1:
Only SMAI or 3PHSUM blocks shall be connected to PMU PHASORREPORT blocks
and they shall have the same cycle time, 0.9 ms.
Figure
39 shows an example of correct connection of SMAI and PHASORREPORT
blocks in ACT where both function blocks are working on 0.9 ms cycle time.
IEC140000124-2-en.vsd
IEC140000124 V2 EN
Figure 39: An example of correct connection of SMAI and PHASORREPORT
blocks in ACT
Figure 40 shows an example of wrong connection of SMAI and PHASORREPORT
blocks in ACT where the SMAI block is working on 3 ms while PHASORREPORT block
is working on 0.9 ms cycle time.
IEC140000125-2-en.vsd
IEC140000125 V2 EN
Figure 40: An example of wrong connection of SMAI and PHASORREPORT blocks
in ACT
Violation of rule 1 results in PMU applications not running at all. The reason is the
inconsistent cycle time. For example, in Figure 40, the SMAI block is updating its output
1MRK 506 369-UUS - Section 6
Wide area measurement system
Line distance protection REL670 2.2 ANSI 123
Application manual