External Fuse Failure - ABB REG670 Applications Manual

Section 15
Control
15.1.2.5
484
Available voltage selection types are for single circuit breaker with double busbars
and the 1½ circuit breaker 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 1½ circuit breaker 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
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 BLKU, 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 function is blocked.
The UB1OK/UB2OK and UB1FF/UB2FF inputs are related to the busbar voltage and
the ULN1OK/ULN2OK and ULN1FF/ULN2FF 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 226. Selected names are just examples but note that the symbol on the local
HMI can only show the active position of the virtual selector.
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
1MRK 502 071-UEN -
Application manual