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 three 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 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.
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 as a percentage of the line length, in
kilometers or miles as selected on the local HMI.
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 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
fault locator is most important) 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.
In the definite time (DT) mode, SPVNZBAT operates
after a predefined operate time and resets when the
battery undervoltage or overvoltage condition
disappears after 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.
Bay control REC650 ANSI
1MRK 511 265-BUS B
Product version: 1.2
ABB 29
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