ABB Relion 650 series RET650 Product Manual page 25

ABB
Transformer protection RET650
Product version: 1.1
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.
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.
Measured value expander block
MVEXP
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 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.
1MRK 504 127-BEN -
Issued: February 2011
Station battery supervision
SPVNZBAT
The station battery supervision function
SPVNZBAT is used for monitoring battery
terminal voltage.
SPVNZBAT activates the start and alarm
outputs when the battery terminal voltage
exceeds the set upper limit or drops below
the set lower limit. A time delay for the
overvoltage and undervoltage alarms can be
set according to definite time characteristics.
In the definite time (DT) mode, SPVNZBAT
operates after a predefined operate time and
resets when the battery undervoltage or
overvoltage condition disappears.
Insulation gas monitoring function
SSIMG
Insulation gas monitoring function (SSIMG) is
used for monitoring the circuit breaker
condition. Binary information based on the
gas pressure in the circuit breaker is used as
input signals to the function. In addition, the
function generates alarms based on received
information.
Insulation liquid monitoring
function SSIML
Insulation liquid monitoring function (SSIML)
is used for monitoring the circuit breaker
condition. Binary information based on the
oil level in the circuit breaker is used as input
signals to the function. In addition, the
function generates alarms based on received
information.
Circuit breaker monitoring SSCBR
The circuit breaker condition monitoring
function SSCBR is used to monitor different
parameters of the circuit breaker. The
breaker requires maintenance when the
number of operations has reached a
predefined value. The energy is calculated
from the measured input currents as a sum of
y
I t values. Alarms are generated when the
calculated values exceed the threshold
settings.
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