External Fuse Failure - ABB REC670 Applications Manual

1MRK 511 401-UUS A
14.1.2.5
Bay control REC670 2.2 ANSI
Application manual
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.

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.
External selection of energizing direction
The energizing can be selected by use of the available logic function blocks. Below is
an example where the choice of mode is done from a symbol ,created in the Graphical
Design Editor (GDE) tool on the local HMI, through selector switch function block,
but alternatively there can for example, be a physical selector switch on the front of the
panel which is connected to a binary to integer function block (B16I).
If the PSTO input is used, connected to the Local-Remote switch on the local HMI, the
choice can also be from the station HMI system, typically ABB Microscada through
IEC 61850–8–1 communication.
The connection example for selection of the manual energizing mode is shown in
figure 107. Selected names are just examples but note that the symbol on the local HMI
can only show the active position of the virtual selector.
Section 14
Control
M12322-3 v12
M12322-10 v8
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