Hitachi Relion REL670 Product Manual page 50

Line distance protection REL670
Version 2.2
Carrier receive logic LCCRPTRC
In Direct transfer trip (DTT) scheme, the received CR signal
gives the trip to the circuit breaker after checking certain
local criteria functions in order to increase the security of
the overall tripping functionality. Carrier receive logic
(LCCRPTRC) function gives final trip output of the DTT
scheme.
Features:
• Carrier redundancy to ensure security in DTT scheme
• Blocking function output on CR Channel Error
• Phase wise trip outputs
Negative sequence overvoltage protection LCNSPTOV
Negative sequence components are present in all types of
fault condition. Negative sequence voltage and current get
high values during unsymmetrical faults.
Zero sequence overvoltage protection LCZSPTOV
Zero sequence components are present in all abnormal
conditions involving earth. They can reach considerably
high values during earth faults.
Negative sequence overcurrent protection LCNSPTOC
Negative sequence components are present in all types of
fault condition. They can reach considerably high values
during abnormal operation.
Zero sequence overcurrent protection LCZSPTOC
Zero sequence components are present in all abnormal
conditions involving earth. They have a considerably high
value during earth faults.
Three phase overcurrent LCP3PTOC
Three phase overcurrent (LCP3PTOC) is designed for
overcurrent conditions.
Features:
• Phase wise start and trip signals
• Overcurrent protection
• Phase wise RMS current is available as service values
• Single definite time stage trip function.
Three phase undercurrent LCP3PTUC
Three phase undercurrent function (LCP3PTUC) is
designed for detecting loss of load conditions.
Features:
• Phase wise start and trip signals
• Phase wise RMS current is available as service values
• Single definite time stage trip function
15. Logic
Tripping logic SMPPTRC
A function block for protection tripping and general start
indication is always provided as a basic function for each
50
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GUID-C5CBB6A2-780D-4008-98E3-455A404D32CB v2
GUID-4CF3EC6A-D286-4808-929B-C9302418E4ED v2
GUID-C4F99554-88BC-4F11-9EFE-91BCA6ED1261 v2
GUID-F0C38DA1-2F39-46DE-AFFE-F919E6CF4A57 v2
GUID-AC4FF35E-5D86-421E-82C7-93F600E9F453 v2
GUID-E8EA5CE8-ED7A-4FA3-9DAC-83227D53387F v3
M12275-3 v15
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circuit breaker. It provides a settable pulse prolongation
time to ensure a trip pulse of sufficient length, as well as all
functionality necessary for correct co-operation with
autoreclosing functions.
The trip function block includes a settable latch function for
the trip signal and circuit breaker lockout.
The trip function can collect start and directional signals
from different application functions. The aggregated start
and directional signals are mapped to the IEC 61850 logical
node data model.
General start matrix block SMAGAPC
The Start Matrix (SMAGAPC) merges start and directional
output signals from different application functions and
creates a common start and directional output signal
(STDIR) to be connected to the Trip function.
The purpose of this functionality is to provide general start
and directional information for the IEC 61850 trip logic data
model SMPPTRC.
Trip matrix logic TMAGAPC
The trip matrix logic (TMAGAPC) function is used to route
trip signals and other logical output signals to different
output contacts on the IED.
The trip matrix logic function has 3 output signals and these
outputs can be connected to physical tripping outputs
according to the specific application needs for settable
pulse or steady output.
Group alarm logic function ALMCALH
The group alarm logic function (ALMCALH) is used to route
several alarm signals to a common indication, LED and/or
contact, in the IED.
Group warning logic function WRNCALH
The group warning logic function (WRNCALH) is used to
route several warning signals to a common indication, LED
and/or contact, in the IED.
Group indication logic function INDCALH
The group indication logic function (INDCALH) is used to
route several indication signals to a common indication,
LED and/or contact, in the IED.
Basic configurable logic blocks
The basic configurable logic blocks do not propagate the
time stamp and quality of signals (have no suffix QT at the
end of their function name). A number of logic blocks and
timers are always available as basic for the user to adapt
the configuration to the specific application needs. The list
below shows a summary of the function blocks and their
features.
1MRK 506 372-BEN Q
GUID-BA516165-96DE-4CD9-979B-29457C7653C0 v3
M15321-3 v14
GUID-16E60E27-F7A8-416D-8648-8174AAC49BB5 v4
GUID-F7D9A012-3AD4-4D86-BE97-DF2A99BE5383 v4
GUID-D8D1A4EE-A87F-46C6-8529-277FC1ADA9B0 v4
M11396-4 v20
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