Fuse Failure Supervision; Voltage Selection - ABB Relion 650 Series REB650 Technical Manual

1MRK 505 288-UEN A
10.1.7.5
10.1.7.6
Technical manual
for GblBaseSelBus or GblBaseSelLine and to be considered dead it must be below
40% of set UBase selected forGblBaseSelBus or GblBaseSelLine.
The frequency on both sides of the circuit breaker is also measured. The frequencies
must not deviate from the rated frequency more than +/-5Hz.
The Energizing direction can be selected individually for the Manual and the
Automatic functions respectively. When the conditions are met the outputs
AUTOENOK and MANENOK respectively will be activated if the fuse supervision
conditions are fulfilled. The output signal can be delayed independently for
MANENOK and AUTOENOK conditions. The Energizing direction can also be
selected by an integer input AENMODE respective MENMODE, which for example,
can be connected to a Binary to Integer function block (B16I). Integers supplied shall
be 1=off, 2=DLLB, 3=DBLL and 4= Both. Not connected input with connection of
INTZERO output from Fixed Signals (FIXDSIGN) function block will mean that the
setting is done from Parameter Setting tool. The active position can be read on outputs
MODEAEN resp MODEMEN. The modes are 0=OFF, 1=DLLB, 2=DBLL and
3=Both.
The inputs BLOCK and BLKENERG are available for total block of the complete
SESRSYN function respective block of the Energizing check function. TSTENERG
will allow testing of the function where the fulfilled conditions are connected to a
separate test output.

Fuse failure supervision

External fuse failure signals or signals from a tripped fuse switch/MCB are connected
to binary inputs that are configured to the inputs of SESRSYN function in the IED.
Alternatively, the internal signals from fuse failure supervision can be used when
available. There are two alternative connection possibilities. Inputs labelled OK must
be connected if the available contact indicates that the voltage circuit is healthy. Inputs
labelled FF must be connected if the available contact indicates that the voltage circuit
is faulty.
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.
Configure them to the binary input or function outputs that indicate the status of the
external fuse failure of the busbar and line voltages. In the event of a fuse failure, the
energizing check function is blocked. The synchronizing and the synchrocheck
function requires full voltage on both sides, thus no blocking at fuse failure is needed.

Voltage selection

The voltage selection module including supervision of included voltage transformers
for the different arrangements is a basic part of the SESRSYN function and determines
the voltages fed to the Synchronizing, Synchrocheck and Energizing check functions.
This includes the selection of the appropriate Line and Bus voltages and MCB
supervision.
Section 10
Control
171