Functional Diagrams - ABB RELION SMU615 Applications Manual

Merging unit variants
Channel
61
62
63
64
3.3.3

Functional diagrams

The functional diagrams describe the default input, output, alarm LED and function-
to-function connections. The default connections can be viewed and changed with
PCM600 according to the application requirements.
The analog channels have fixed connections to the different function blocks inside
the merging unit's application configuration. However, the 12 analog channels
available for the disturbance recorder function are freely selectable as a part of
the disturbance recorder's parameter settings.
Phase currents are fed to the merging unit from a current transformer or a current
sensor depending on the order options. Residual current is fed to the merging unit
either from residually connected CTs, an external core balance CT or neutral CT.
Phase voltages are fed to the merging unit from a voltage transformer or a voltage
sensor depending on the order options.
3.3.3.1 Functional diagrams for local and remote control
The functional diagrams describe the merging unit's functionality in detail and
according to the factory set default connections.
Figure 17: Local and remote control mode function
44
ID text
-
-
-
-
General logic state TRUE and FALSE
IN
FALSE
O:24|T:2.5|I:0
IN
TRUE
O:36|T:2.5|I:3
Local & remote control
CTRL_OFF
CTRL_LOC
TRUE
CTRL_STA
CTRL_REM
CTRL_ALL
O:25|T:2.5|I:0
Level trigger mode
-
-
-
-
NOT
OUT
NOT
OUT
Control
OFF
LOCAL
STATION
REMOTE
ALL
BEH_TEST
BEH_BLK
1MRS758580 C
TRUE
FALSE
SMU615
Application Manual