ABB REL650 Product Manual page 29

Line distance protection REL650 ANSI
Product version: 1.3
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 recorder
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 9,9
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.
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
MVEXP 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 limit or
above high-high limit. The output signals can be used as
conditions in the configurable logic or for alarming purpose.
Fault locator LMBRFLO
The Fault locator LMBRFLO in the IED is an essential complement
to other monitoring functions, since it measures and indicates the
distance to the fault with great accuracy. It indicates the distance
to fault in kilometers or miles as selected by parameter setting.
The accurate fault locator is an essential component to minimize
the outages after a persistent fault and/or to pin-point a weak
spot on the line.
The fault locator is an impedance measuring function giving the
distance to the fault as a relative (in%) or an absolute value. The
main advantage is the high accuracy achieved by compensating
ABB
for load current and for the mutual zero-sequence effect on
double circuit lines.
The compensation includes setting of the remote and local
sources and calculation of the distribution of fault currents from
each side. This distribution of fault current, together with
recorded load (pre-fault) currents, is used to exactly calculate the
fault position. The fault can be recalculated with new source data
at the actual fault to further increase the accuracy.
Especially on heavily loaded long lines, where the source voltage
angles can be up to 35-40 degrees apart, the accuracy can be still
maintained with the advanced compensation included in fault
locator.
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.
SPVNZBAT operates after a settable operate time and resets
when the battery undervoltage or overvoltage condition
disappears after settable reset time.
Insulation gas monitoring function SSIMG
Insulation gas monitoring function SSIMG (63) 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 (71) 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. For proper functioning of the circuit
breaker, it is essential to monitor the circuit breaker operation,
spring charge indication, breaker wear, travel time, number of
operation cycles and accumulated energy. The energy is
calculated from the measured input currents as a sum of I
values. Alarms are generated when the calculated values exceed
the threshold settings.
1MRK 506 337-BUS B
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