ABB RELION SMU615 Applications Manual page 58

Merging unit variants
3.4.3 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.
3.4.3.1 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.
GOOSERCV_BIN 8_L/R_MODE
GOOSERCV_BIN 18_L/R_MODE
Figure 31: Local and remote control mode function
3.4.3.2 Functional diagrams for disturbance recorder
Output signals from the condition monitoring and supervision functions are
routed to trigger the disturbance recorder or, alternatively, only to be recorded by
the disturbance recorder depending on the parameter settings. Additionally, the
selected signals from different functions are also connected to the disturbance
recorder.
58
Local & remote control
OR
B1 O
B2
X110_BI6_CONTROL_OFF
NOT
IN OUT
1MRS758580 C
Control
CTRL_OFF OFF
CTRL_LOC LOCAL
CTRL_STA STATION
CTRL_REM REMOTE
CTRL_ALL ALL
BEH_TEST
BEH_BLK
SMU615
Application Manual
Control_OFF