ABB Relion REC615, Техническое руководство

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Automatic reconnection to the preferred bus is established when the voltage on the
preferred bus has reached a normal level. The preferred main bus can be selected
from the settings. The automatic operation can be selected on/off from a virtual
button on the SLD.
Automatic operation ongoing is signalled outside to output
INPRO
. If the automatic
operations are blocked an alarm is activated on the LED panel.
9.5.4 Operation principle
The
Operation setting is used to enable or disable the function. "On" enables the
function and "Off" disables the function.
The operation of ATSABTC can be described by using a module diagram. All the
modules in the diagram are explained in the next sections.
CLOSE_CB1
CLOSE_CB2
OPEN_CB2
INPRO
OPEN_CB1
Control
logic
Bus fault
check
CB1_POSOPEN
CB1_POSCLOSE
CB2_POSOPEN
CB2_POSCLOSE
UN_U_BUS1
UN_U_BUS2
BLOCK
Auto
blocking
alarm logic
BLKD_AL
In
progress
logic
Figure 348: Functional module diagram
All inputs and outputs for the ATSABTC function block are binary signals. Voltage
presence indication at each bus is connected to inputs
UN_U_BUS1
and
UN_U_BUS2
,
where a binary TRUE represents under-voltage on bus. Fault on the busbar (earth
fault or overcurrent) is connected to the input
BLOCK
.
Bus fault check
Under-voltage on respective bus is detected with
UN_U_BUS1
and
UN_U_BUS2
. Input
BLOCK
also indicates common bus fault, but furthermore blocks the automatic
operation in the control logic modules.
1MRS758755 C Control functions
REC615 & RER615
Technical Manual
691