ABB RET670 Product Manual page 23

ABB
Transformer protection RET670
Customized
Product version: 1.2
short term (for example corrective actions) and in
the long term (for example functional analysis).
The event recorder logs all selected binary input
signals connected to the Disturbance report
function. Each recording can contain up to 150
time-tagged events.
The event recorder information is available for the
disturbances locally in the IED.
The event recording information is an integrated
part of the disturbance record (Comtrade file).
Trip value recorder DRPRDRE
Information about the pre-fault and fault values for
currents and voltages are vital for the disturbance
evaluation.
The Trip value recorder calculates the values of all
selected analog input signals connected to the
Disturbance report function. The result is
magnitude and phase angle before and during the
fault for each analog input signal.
The trip value recorder information is available for
the disturbances locally in the IED.
The trip value recorder information is an
integrated part of the disturbance record
(Comtrade file).
Disturbance recorder DRPRDRE
The Disturbance recorder function supplies fast,
complete and reliable information about
disturbances in the power system. It facilitates
understanding system behavior and related
primary and secondary equipment during and
after a disturbance. Recorded information is used
for different purposes in the short perspective (for
example corrective actions) and long perspective
(for example functional analysis).
The Disturbance recorder acquires sampled data
from selected analog- and binary signals
connected to the Disturbance report function
(maximum 40 analog and 96 binary signals). The
binary signals available are the same as for the
event recorder function.
The function is characterized by great flexibility
and is not dependent on the operation of
protection functions. It can record disturbances
not detected by protection functions. Up to ten
1MRK 504 117-BEN D
seconds of data before the trigger instant can be
saved in the disturbance file.
The disturbance recorder information for up to
100 disturbances are saved in the IED and the
local HMI is used to view the list of recordings.
Event function
When using a Substation Automation system with
LON or SPA communication, time-tagged events
can be sent at change or cyclically from the IED
to the station level. These events are created from
any available signal in the IED that is connected
to the Event function (EVENT). The event function
block is used for LON and SPA communication.
Analog and double indication values are also
transferred through EVENT function.
IEC61850 generic communication I/O function
SPGGIO
IEC61850 generic communication I/O functions
(SPGGIO) is used to send one single logical signal
to other systems or equipment in the substation.
IEC61850 generic communication I/O functions
MVGGIO
IEC61850 generic communication I/O functions
(MVGGIO) function is used to send the
instantaneous value of an analog signal to other
systems or equipment in the substation. It can
also be used inside the same IED, to attach a
RANGE aspect to an analog value and to permit
measurement supervision on that value.
Measured value expander block RANGE_XP
The current and voltage measurements functions
(CVMMXN, CMMXU, VMMXU and VNMMXU),
current and voltage sequence measurement
functions (CMSQI and VMSQI) and IEC 61850
generic communication I/O functions (MVGGIO)
are provided with measurement supervision
functionality. All measured values can be
supervised with four settable limits: low-low limit,
low limit, high limit and high-high limit. The
measure value expander block (RANGE_XP) has
been introduced to enable translating the integer
output signal from the measuring functions to 5
binary signals: below low-low limit, below low
limit, normal, above high-high limit or above high
limit. The output signals can be used as
conditions in the configurable logic or for alarming
purpose.
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