Energizing Check - ABB REG650 Technical Manual

1MRK 502 043-UUS B
12.1.7.4
12.1.7.5
Technical Manual

Energizing check

Voltage values are measured in the IED centrally and are available for evaluation by
the Synchronism check function.
The function measures voltages on the busbar and the line to verify whether they are
live or dead. To be considered live, the value must be above 80% of GblBaseSelBus or
GblBaseSelLine and to be considered dead it must be below 40% of GblBaseSelBus 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 (25) 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 (25) 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 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.
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 synchronism check function requires full
voltage on both sides and will be blocked automatically in the event of fuse failures.
Section 12
Control
327