Logic - ABB REC650 Product Manual

ABB
Bay control REC650 ANSI
Product version: 1.2
A detection of a difference indicates a fault in the
circuit and is used as alarm or to block protection
functions expected to give unwanted tripping.
Fuse failure supervision SDDRFUF
The aim of the fuse failure supervision function
(SDDRFUF) is to block voltage measuring functions
at failures in the secondary circuits between the
voltage transformer and the IED in order to avoid
unwanted operations that otherwise might occur.
The fuse failure supervision function basically has
three different algorithms, negative sequence and
zero sequence based algorithms and an additional
delta voltage and delta current algorithm.
The negative sequence detection algorithm is
recommended for IEDs used in isolated or high-
impedance grounded networks. It is based on the
negative-sequence measuring quantities, a high
value of negative sequence voltage 3V
presence of the negative-sequence current 3I
The zero sequence detection algorithm is
recommended for IEDs used in directly or low
impedance grounded networks. It is based on the
zero sequence measuring quantities, a high value of
zero sequence voltage 3V
0
the zero sequence current 3I
For better adaptation to system requirements, an
operation mode setting has been introduced which
makes it possible to select the operating conditions
for negative sequence and zero sequence based
function. The selection of different operation modes
makes it possible to choose different interaction
possibilities between the negative sequence and
zero sequence based algorithm.
A criterion based on delta current and delta voltage
measurements can be added to the fuse failure
supervision function in order to detect a three
phase fuse failure, which in practice is more
associated with voltage transformer switching
during station operations.
Breaker close/trip circuit monitoring TCSSCBR
The trip circuit monitoring function TCSSCBR is
designed for supervision of control circuits. A fault
without the
2
.
2
without the presence of
.
0
in a control circuit is detected by using a dedicated
output contact that contains the monitoring
functionality.
The function picks up and trips when TCSSCBR
detects a trip circuit failure. The trip time
characteristic for the function is of definite time (DT)
type. The function trips after a predefined operating
time and resets when the fault disappears.

9. Logic

Tripping logic common 3-phase output SMPPTRC
(94)
A function block for protection tripping is provided
for each circuit breaker involved in the tripping of
the fault. It provides pulse prolongation to ensure a
three-phase trip pulse of sufficient length, as well as
all functionality necessary for correct co-operation
with autoreclosing functions.
The trip function block also includes functionality for
breaker lock-out.
Trip matrix logic TMAGGIO
The Trip matrix logic TMAGGIO function is used to
route trip signals and other logical output signals to
the tripping logics SMPPTRC and SPTPTRC or to
different output contacts on the IED.
TMAGGIO output signals and the physical outputs
allows the user to adapt the signals to the physical
tripping outputs according to the specific
application needs.
Configurable logic blocks
A number of logic blocks and timers are available
for the user to adapt the configuration to the
specific application needs.
• OR function block.
• INVERTER function blocks that inverts the input
signal.
• PULSETIMER function block can be used, for
example, for pulse extensions or limiting of
operation of outputs, settable pulse time.
1MRK 511 265-BUS B
25