ABB RED650, Technical Manual

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allowed, the function performs the execution command. In case of erroneous
conditions, the function indicates an appropriate "cause" value, see Table
183 .
SXCBR has an operation counter for closing and opening commands. The counter
value can be read remotely from the operator place. The value is reset from local
HMI, a binary input or remotely from the operator place by configuring a signal
from the Single Point Generic Control 8 signals (SPC8GAPC) for example. The
health of the external equipment, the switch, can be monitored according to IEC
61850-8-1. The operation counter functionality and the external equipment health
supervision are independent sub-functions of the circuit breaker function.
Local/Remote switch
M13487-7 v4
One binary input signal LR_SWI is included in SXCBR to indicate the local/
remote switch position from switchyard provided via the I/O board. If this signal is
set to TRUE it means that change of position is allowed only from switchyard
level. If the signal is set to FALSE it means that command from IED or higher
level is permitted. When the signal is set to TRUE all commands (for change of
position) are rejected, even trip commands from protection functions are rejected.
The functionality of the local/remote switch is described in Figure
180 .
From I/O switchLR
TRU
E
FALS
E
Local= Operation at
switch yard level
Remote= Operation at
IED or higher level
en05000096.vsd
IEC05000096 V1 EN-US
Figure 180: Local/Remote switch
Blocking principles
M13487-12 v6
SXCBR includes several blocking principles. The basic principle for all blocking
signals is that they will affect commands from all other clients for example, switch
controller, protection functions and autoreclosure.
The blocking possibilities are:
• Block/deblock for open command. It is used to block operation for the open
command.
• Block/deblock for close command. It is used to block operation for the close
command.
• Update block/deblock of positions. It is used to block the updating of position
values. Other signals related to the position will be reset.
• Blocking of function, BLOCK. If BLOCK signal is set, it means that the
function is active, but no outputs are generated, no reporting, control
commands are rejected and functional and configuration data is visible.
Section 12
1MRK 505 394-UEN A
Control
374 Line differential protection RED650 2.2 IEC
Technical manual