Voltage Selection; External Fuse Failure - ABB Relion 670 Series Applications Manual

1MRK 511 358-UUS A
The energizing operation can operate in the dead line live bus (DLLB) direction, dead bus live line
(DBLL) direction, or in both directions over the circuit breaker. Energizing from different
directions can be different for automatic reclosing and manual closing of the circuit breaker. For
manual closing it is also possible to allow closing when both sides of the breaker are dead, Dead
Bus Dead Line (DBDL).
The equipment is considered energized (Live) if the voltage is above the set value for
VLiveBusEnerg or VLiveLineEnerg of the base voltages GblBaseSelBus and VGblBaseSelLine , which
are defined in the Global Base Value groups, according to the setting of
GblBaseSelLine ; in a similar way, the equipment is considered non-energized (Dead) if the voltage
is below the set value for
disconnected line can have a considerable potential due to factors such as induction from a line
running in parallel, or feeding via extinguishing capacitors in the circuit breakers. This voltage can
be as high as 50% or more of the base voltage of the line. Normally, for breakers with single
breaking elements (<330 kV) the level is well below 30%.
When the energizing direction corresponds to the settings, the situation has to remain constant
for a certain period of time before the close signal is permitted. The purpose of the delayed
operate time is to ensure that the dead side remains de-energized and that the condition is not
due to temporary interference.
13.1.2.4

Voltage selection

The voltage selection function is used for the connection of appropriate voltages to the
synchronism check, synchronizing and energizing check functions. For example, when the IED is
used in a double bus arrangement, the voltage that should be selected depends on the status of
the breakers and/or disconnectors. By checking the status of the disconnectors auxiliary contacts,
the right voltages for the synchronism check and energizing check functions can be selected.
Available voltage selection types are for single circuit breaker with double busbars and the
breaker-and-a-half arrangement. A double circuit breaker arrangement and single circuit breaker
with a single busbar do not need any voltage selection function. Neither does a single circuit
breaker with double busbars using external voltage selection need any internal voltage selection.
Manual energization of a completely open diameter in breaker-and-a-half switchgear is allowed by
internal logic.
The voltages from busbars and lines must be physically connected to the voltage inputs in the IED
and connected, using the PCM software, to each of the SESRSYN (25) functions available in the
IED.
13.1.2.5

External fuse failure

Either external fuse-failure signals or signals from a tripped fuse (or miniature circuit breaker) are
connected to HW binary inputs of the IED; these signals are connected to inputs of SESRSYN
function in the application configuration tool of PCM600. The internal fuse failure supervision
function can also be used if a three phase voltage is present. The signal BLKV, from the internal
fuse failure supervision function, is then used and connected to the fuse supervision inputs of the
SESRSYN function block. In case of a fuse failure, the SESRSYN energizing (25) function is blocked.
The VB1OK/VB2OK and VB1FF/VB2FF inputs are related to the busbar voltage and the VL1OK/
VL2OK and VL1FF/VL2FF inputs are related to the line voltage.
Application manual
VDeadBusEnerg or VDeadLineEnerg of the Global Base Value groups. A
Section 13
Control
GblBaseSelBus and
M12321-3 v10
M12322-3 v11
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