ABB RET670 Product Manual page 24

Transformer protection RET670
Pre-configured
Product version: 1.1
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 all selected analog input and
binary signals connected to the Disturbance
report function (maximum 40 analog and 96
binary signals). The binary signals are the
same signals as available under the event
recorder function.
The function is characterized by great
flexibility and is not dependent on the
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1MRK 504 091-BEN B
operation of protection functions. It can
record disturbances not detected by
protection functions.
The disturbance recorder information for the
last 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.
Measured value expander block RANGE_XP
The current and voltage measurements
functions (CVMMXU, 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 that is low-low limit, low limit,
high limit and high-high limit. The measure
value expander block (RANGE_XP) has been
introduced to be able to translate the integer
output signal from the measuring functions to
5 binary signals that is 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.
Metering
Pulse counter logic PCGGIO
Pulse counter (PCGGIO) function counts
externally generated binary pulses, for
instance pulses coming from an external
energy meter, for calculation of energy
consumption values. The pulses are captured
Issued: June 2010
ABB