ABB Relion 670 series Product Manual page 20

Line distance protection REL670 ANSI
Pre-configured
Product version: 1.2
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 remote communication.
Analog and double indication values are also
transferred through EVENT function.
IEC61850 generic communication I/O function
SPGGIO
IEC61850 generic communication I/O functions
(SPGGIO) is used to send one single logical signal
to other systems or equipment in the substation.
IEC61850 generic communication I/O functions
MVGGIO
IEC61850 generic communication I/O functions
(MVGGIO) function is used to send the
instantaneous value of an analog output to other
systems or equipment in the substation. It can also
be used inside the same IED, to attach a RANGE
aspect to an analog value and to permit
measurement supervision on that value.
Measured value expander block RANGE_XP
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 (RANGE_XP) 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 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
20
(in%) or an absolute value. The main advantage is
the high accuracy achieved by compensating for
load current.
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.
11. 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 by the binary input module and then read
by the function. A scaled service value is available
over the station bus. The special Binary input
module with enhanced pulse counting capabilities
must be ordered to achieve this functionality.
Function for energy calculation and demand
handling ETPMMTR
Outputs from the Measurements (CVMMXN)
function can be used to calculate energy
consumption. Active as well as reactive values are
calculated in import and export direction. Values
can be read or generated as pulses. Maximum
demand power values are also calculated by the
function.
12. Basic IED functions
Time synchronization
The time synchronization source selector is used to
select a common source of absolute time for the
IED when it is a part of a protection system. This
1MRK 506 317-BUS A
ABB