External Fuse Failure - ABB REB670 Applications Manual

Section 12
Control
12.1.2.5
286
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
108. Selected names are just examples but note that the symbol on the local HMI can only
show the active position of the virtual selector.
1MRK 505 337-UUS -
Application manual