![background image](http://html1.mh-extra.com/html/abb/rec650-ansi/rec650-ansi_product-manual_3389474024.webp)
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 earthed networks. It is based
on the negative-sequence measuring
quantities, a high value of voltage 3U
2
without the presence of the negative-
sequence current 3I
2
.
The zero sequence detection algorithm is
recommended for IEDs used in directly or
low impedance earthed networks. It is based
on the zero sequence measuring quantities, a
high value of voltage 3U
0
without the
presence of the residual current 3I
0
.
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.
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.
Breaker close/trip circuit
monitoring TCSSCBR
The trip circuit supervision function TCSSCBR
is designed to supervise the control circuit of
the circuit breaker. The invalidity of a control
circuit is detected by using a dedicated
output contact that contains the supervision
functionality.
The function operates after a predefined
operating time and resets when the fault
disappears.
9. Logic
Tripping logic SMPPTRC
A function block for protection tripping is
provided for each circuit breaker involved in
the tripping of the fault. It provides the pulse
prolongation to ensure a trip pulse of
sufficient length, as well as all functionality
necessary for correct co-operation with
autoreclosing functions.
The trip function block includes functionality
for breaker lock-out.
Trip matrix logic TMAGGIO
Trip matrix logic TMAGGIO function is used
to route trip signals and other logical output
signals 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.
•
GATE
function block is used for whether
or not a signal should be able to pass from
the input to the output.
•
XOR
function block.
Bay control REC650
1MRK 511 249-BEN -
Product version: 1.1
Issued: February 2011
24
ABB
Summary of Contents for REC650 ANSI
Page 1: ...Relion 650 series Bay control REC650 Product Guide...
Page 81: ...81...