ABB 615 Series ANSI, Technical Manual

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1MAC050144-MB C
Section 7
Control functions
615 series ANSI 517
Technical Manual
The energizing check function checks that at least one side is dead to ensure that closing
can be done safely.
The function contains a blocking functionality. It is possible to block function outputs and
timers if desired.
7.3.4 Operation principle
The function can be enabled and disabled with the Operation setting. The corresponding
parameter values are Enable and Disable.
The synchrocheck function has two parallel functionalities, the synchrocheck and
energizing check functionality. The operation of the synchronism and energizing check
function can be described using a module diagram. All the modules in the diagram are
explained in the next sections.
Figure 281: Functional module diagram
The synchrocheck function can operate either with V_AB or V_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 function checks the energizing direction. Energizing is defined as a
situation where a dead network part is connected to an energized section of the network.
The conditions of the network sections to be controlled by the circuit breaker, that is,
which side has to be live and which side dead, are determined by the setting. A situation
where both sides are dead is possible as well. The actual value for defining the dead line
or bus is given with the
Dead bus value and Dead line value settings. Similarly, the actual
values of live line or bus are defined with the Live bus value and Live line value settings.
SYNC_OK
BLOCK
Energizing
check
Synchro
check
V_BUS
V_LINE
CL_COMMAND
SYN_INPRO
CMD_FAIL_AL
CL_FAIL_AL
BYPASS
LLLB
LLDB
DLLB
DLDB