Operation Principle - ABB RELION REX640 Technical Manual

1MRS759142 C
9.7.5
REX640
Technical Manual

Operation principle

The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "on" and "off".
The operation of ASNSCSYN can be described with a module diagram. All the
modules in the diagram are explained in the next sections.
U3P1
U3P2
BLOCK
CL_COMMAND
BYPASS
EXT_CHECK
CB_TEST
CB_CLOSE
CB_OPEN
ISO_A1_CLOSE
ISO_A2_CLOSE
ISO_B1_CLOSE
ISO_B2_CLOSE
ASC1_NS_DAT
GUID-DE46CE27-BE12-4B55-9264-D87B0F1E76A6 V2 EN
Figure 766: Functional module diagram
This function can operate either with the U_AB or U_A voltages. The selection of
used voltages is defined with the VT connection setting of the line voltage general
parameters.
Energizing check
The Energizing check module checks the energizing direction. Energizing is the
situation where a dead network part is connected to an energized section of the
network. The Live dead mode setting is used to set the energized condition of the bus
section across the CB, that is, whether the bus section across the CB is live or dead.
When the Live dead mode setting parameter is set to "Command", then
the energized condition (see
can be set using the Live dead mode Ctl control command only. If the
Live dead mode setting parameter is not set to "Command", then the
Live dead mode setting parameter is used to set the energized
condition (see
U_A_AB
U_B_BC
U_C_CA
Energizing
U_A_AB
check
Synchroni-
zation
check and
control
Table
Table 1369) of the bus section across the CB.
Section 9
Control functions
LADB
LALB
DALB
DADB
SYNC_INPRO
SYNC_OK
MATCH_INPRO
MATCH_OK
CLOSE_CB
CL_FAIL_AL CL_FAIL_AL CL_FAIL_AL CL_FAIL_AL
CMD_FAIL_AL
CB_SELECTED
AS_INIT_FAIL
NS_ASC_DAT
U_DIFF
FR_DIFF_MEAS
1369) of bus sections across the CB
1431