External Fuse Failure - ABB RELION 670 Series Applications Manual

1MRK 504 152-UEN B
contacts, the right voltages for the synchronizing, synchrocheck and energizing check
functions can be selected.
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.
14.1.2.5

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 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 289.
Selected names are just examples but note that the symbol on the local HMI can only show the
active position of the virtual selector.
IEC07000118 V3 EN-US
Figure 289: Selection of the energizing direction from a local HMI symbol through a
Application manual
selector switch function block.
Section 14
Control
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