ABB Relion 650 series RET650 Product Manual page 24

Transformer protection RET650
Product version: 1.1
Disturbance report DRPRDRE, always
included in the IED, acquires sampled data of
all selected analog input and binary signals
connected to the function block that is,
maximum 40 analog and 96 binary signals.
The Disturbance report functionality is a
common name for several functions:
• Event list
• Indications
• Event recorder
• Trip value recorder
• Disturbance recorder
The Disturbance report function is
characterized by great flexibility regarding
configuration, starting conditions, recording
times, and large storage capacity.
A disturbance is defined as an activation of
an input to the AxRADR or BxRBDR function
blocks, which are set to trigger the
disturbance recorder. All signals from start of
pre-fault time to the end of post-fault time
will be included in the recording.
Every disturbance report recording is saved
in the IED in the standard Comtrade format.
The same applies to all events, which are
continuously saved in a ring-buffer. The local
HMI is used to get information about the
recordings. The disturbance report files may
be uploaded to PCM600 for further analysis
using the disturbance handling tool.
Event list DRPRDRE
Continuous event-logging is useful for
monitoring the system from an overview
perspective and is a complement to specific
disturbance recorder functions.
The event list logs all binary input signals
connected to the Disturbance report function.
The list may contain up to 1000 time-tagged
events stored in a ring-buffer.
Indications DRPRDRE
To get fast, condensed and reliable
information about disturbances in the
primary and/or in the secondary system it is
important to know, for example binary
signals that have changed status during a
24
1MRK 504 127-BEN -
Issued: February 2011
disturbance. This information is used in the
short perspective to get information via the
local HMI in a straightforward way.
There are three LEDs on the local HMI
(green, yellow and red), which will display
status information about the IED and the
Disturbance report function (trigged).
The Indication list function shows all selected
binary input signals connected to the
Disturbance report function that have
changed status during a disturbance.
Event recorder DRPRDRE
Quick, complete and reliable information
about disturbances in the primary and/or in
the secondary system is vital, for example,
time-tagged events logged during
disturbances. This information is used for
different purposes in the 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).
ABB