ABB Relion REB500 User manual

RELION® REB500
Distributed busbar protection REB500
Version 8.3 ANSI
Technical manual

Document ID: 1MRK 505 400-UUS
Issued: January 2022
Revision: B
Product version: 8.3
© 2020 - 2022 Hitachi Energy. All rights reserved

Copyright
This document and parts thereof must not be reproduced or copied without written permission from
Hitachi Energy, and the contents thereof must not be imparted to a third party, nor used for any
unauthorized purpose.
The software and hardware described in this document is furnished under a license and may be used or
disclosed only in accordance with the terms of such license.
This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit.
(https://www.openssl.org/) This product includes cryptographic software written/developed by: Eric Young
([email protected]) and Tim Hudson ([email protected]).
Trademarks
ABB is a registered trademark of ABB Asea Brown Boveri Ltd. Manufactured by/for a Hitachi Energy
company. All other brand or product names mentioned in this document may be trademarks or registered
trademarks of their respective holders.
Warranty
Please inquire about the terms of warranty from your nearest Hitachi Energy representative.

Disclaimer
The data, examples and diagrams in this manual are included solely for the concept or product
description and are not to be deemed as a statement of guaranteed properties. All persons responsible
for applying the equipment addressed in this manual must satisfy themselves that each intended
application is suitable and acceptable, including that any applicable safety or other operational
requirements are complied with. In particular, any risks in applications where a system failure and/or
product failure would create a risk for harm to property or persons (including but not limited to personal
injuries or death) shall be the sole responsibility of the person or entity applying the equipment, and those
so responsible are hereby requested to ensure that all measures are taken to exclude or mitigate such
risks.
This document has been carefully checked by Hitachi Energy but deviations cannot be completely ruled
out. In case any errors are detected, the reader is kindly requested to notify the manufacturer. Other than
under explicit contractual commitments, in no event shall Hitachi Energy be responsible or liable for any
loss or damage resulting from the use of this manual or the application of the equipment.

Conformity
This product complies with the directive of the Council of the European Communities on the
approximation of the laws of the Member States relating to electromagnetic compatibility (EMC Directive
2004/108/EC) and concerning electrical equipment for use within specified voltage limits (Low-voltage
directive 2006/95/EC). This conformity is the result of tests conducted by Hitachi Energy in accordance
with the product standard EN 60255-26 for the EMC directive, and with the product standards EN
60255-1 and EN 60255-27 for the low voltage directive. The product is designed in accordance with the
international standards of the IEC 60255 series.

Table of contents
Section 1 Introduction.........................................................................................................3
1.1 This manual.................................................................................................................................3
1.2 Intended audience.......................................................................................................................3
1.3 Product documentation............................................................................................................... 3
1.4 Revision history........................................................................................................................... 3
1.5 Symbols and conventions........................................................................................................... 4
1.5.1 Symbols.....................................................................................................................................4
1.5.2 Document conventions..............................................................................................................4
Section 2 Safety information.............................................................................................. 5
Section 3 Signals................................................................................................................. 7
3.1 Signal designations..................................................................................................................... 7
3.2 Binary inputs on bay units........................................................................................................... 9
3.3 Binary outputs on bay units....................................................................................................... 13
3.4 Binary inputs on central unit...................................................................................................... 16
3.5 Binary outputs on central unit....................................................................................................18
3.6 System blocking design.............................................................................................................20
3.7 System In service design.......................................................................................................... 25
3.7.1 Central unit signal 41810_In service....................................................................................... 25
3.7.2 Bay unit signal 21805_In service.............................................................................................25
3.8 Combined tripping commands...................................................................................................26
3.8.1 Definition................................................................................................................................. 26
3.8.2 Tripping commands automatically combined by the system................................................... 27
3.8.3 User defined combined tripping (integration of bay protection) ..............................................27
Section 4 System settings................................................................................................ 31
4.1 Circuit breakers......................................................................................................................... 31
4.2 Disconnectors............................................................................................................................32
4.3 Current transformers................................................................................................................. 33
4.4 Voltage transformers................................................................................................................. 35
4.5 System response.......................................................................................................................36
4.5.1 System response to a differential current alarm......................................................................36
4.5.2 System response to an isolator alarm.....................................................................................36
4.5.3 Isolator operating time.............................................................................................................37
4.5.4 Remote trip impulse width.......................................................................................................37
4.6 Event memory........................................................................................................................... 37
4.7 Time synchronization.................................................................................................................37
4.7.1 Synchronizing using IRIG-B.................................................................................................... 38
1MRK 505 400-UUS Rev. B Table of contents
Distributed busbar protection REB500 1
Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

4.7.2 Synchronizing using PPS........................................................................................................38
4.7.3 Synchronization by SNTP....................................................................................................... 38
4.7.4 Additional settings................................................................................................................... 39
4.7.4.1 Time zone correction..........................................................................................................39
4.7.4.2 Daylight saving time........................................................................................................... 39
Section 5 Busbar protection.............................................................................................41
5.1 Configuration............................................................................................................................. 41
5.2 Tripping logic............................................................................................................................. 42
Section 6 Additional protection options..........................................................................43
6.1 Breaker failure protection (BFP)................................................................................................43
6.1.1 Mode of operation................................................................................................................... 43
6.1.2 Configuration...........................................................................................................................45
6.2 BFP neutral measurement system (BFP L0).............................................................................46
6.2.1 Mode of operation................................................................................................................... 46
6.2.2 Configuration or current setting of BFP L0 system..................................................................48
6.2.2.1 Details................................................................................................................................ 49
6.3 Overcurrent definite time protection.......................................................................................... 50
6.3.1 Mode of operation................................................................................................................... 50
6.3.2 Configuration of overcurrent protection...................................................................................50
6.4 End fault protection................................................................................................................... 51
6.4.1 Mode of operation................................................................................................................... 51
6.4.2 Configuration...........................................................................................................................53
6.5 Breaker pole discrepancy protection (PDF).............................................................................. 54
6.5.1 Mode of operation................................................................................................................... 54
6.5.2 Configuration...........................................................................................................................56
Section 7 Additional functions......................................................................................... 57
7.1 Voltage release..........................................................................................................................57
7.1.1 Combined over- and undervoltage release............................................................................. 58
7.1.2 VT assignment........................................................................................................................ 59
7.1.2.1 VT Located in a feeder or a bus-tie breaker arrangement ................................................ 60
7.1.2.2 VT Located at the busbar...................................................................................................60
7.2 Enabling tripping commands..................................................................................................... 60
7.2.1 Overcurrent release of the trip command................................................................................60
7.2.2 Release logic or matrix............................................................................................................61
7.2.2.1 Enabling bay unit functions (column 5).............................................................................. 61
7.2.2.2 Enabling protection zone functions (columns 1 to 4)..........................................................62
7.2.3 Release by 31805_External release BB zone.........................................................................63
7.2.4 Release by the internal voltage function................................................................................. 63
7.3 Trip redirection...........................................................................................................................63
Table of contents 1MRK 505 400-UUS Rev. B
2Distributed busbar protection REB500
Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

Section 1 Introduction
1.1 This manual GUID-D4C9F3E0-CA27-4361-A376-B29FE56AE356 v2
The technical manual contains application and functionality descriptions and lists the function blocks,
logic diagrams, input and output signals, setting parameters and technical data sorted as per function.
1.2 Intended audience GUID-7DC1D391-D39C-4FA6-97B2-9DF1729A518C v1
This manual addresses system engineers and installation and commissioning personnel, who use
technical data during engineering, installation and commissioning, and in normal service.
The system engineer must have a thorough knowledge of protection systems, protection equipment,
protection functions and the configured functional logic in the IEDs. The installation and commissioning
personnel must have a basic knowledge in handling electronic equipment.
1.3 Product documentation GUID-91F0A03F-D1AF-4695-A239-1FC87E7459EE v3
REB500 manuals Document numbers
Product guide 1MRK 505 402-BEN
Application manual 1MRK 505 399-UUS
Technical manual 1MRK 505 400-UUS
Operation manual 1MRK 500 132-UUS
Engineering manual 1MRK 511 452-UUS
Commissioning manual 1MRK 505 401-UUS
Application manual for bay protection functions 1MRK 505 403-UUS
Technical manual for bay protection functions 1MRK 505 406-UUS
Cyber security deployment guideline 1MRK 511 453-UEN
Communication protocol manual IEC 61850 1MRK 511 450-UEN
Communication protocol manual IEC 60870-5-103 1MRK 511 451-UEN
Getting started guide 1MRK 505 404-UEN
1.4 Revision history GUID-C876BDE2-918C-4B31-BA00-4D4A4190BFDC v2
Document
revision
Date Product revision History
A 2020-10 8.3.1 First release
B 2022-01 8.3.2 Redundant PSM added,
updates and extensions
1MRK 505 400-UUS Rev. B Section 1
Introduction
Distributed busbar protection REB500 3
Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

1.5 Symbols and conventions
1.5.1 Symbols GUID-4F7DD10A-DEE5-4297-8697-B8AAB5E3262F v2
The electrical warning icon indicates the presence of a hazard which could result in
electrical shock.
The warning icon indicates the presence of a hazard which could result in personal
injury.
The caution icon indicates important information or warning related to the concept
discussed in the text. It might indicate the presence of a hazard which could result in
corruption of software or damage to equipment or property.
The information icon alerts the reader of important facts and conditions.
The tip icon indicates advice on, for example, how to design your project or how to use a
certain function.
Although warning hazards are related to personal injury, it is necessary to understand that under certain
operational conditions, operation of damaged equipment may result in degraded process performance
leading to personal injury or death. Therefore, comply fully with all warning and caution notices.
1.5.2 Document conventions GUID-37C3ACF4-BD79-43C6-B37E-24B38EE69301 v3
A particular convention may not be used in this manual.
• Abbreviations and acronyms in this manual are spelled out in the glossary. The glossary also
contains definitions of important terms.
• Push button navigation in the LHMI menu structure is presented by using the push button icons.
For example, to navigate the options, use and .
• HMI menu paths are presented in bold.
For example, select Main menu/Settings .
• Signal names are presented in bold.
The signal 21120_EXT_TEST_TRIP can be set and reset via the LHMI Test Trip menu.
• Parameter names and parameter values are presented in italics.
For example, the default value of the Operation setting is Not inverted.
• Section references are presented with the respective section numbers.
For example, see Section 1.5.2 for more details about document conventions.
• The phase names L1, L2, L3, and L0 should be read as phase A,B,C, and N respectively.
• The term Disturbance recorder should be read as Digital Fault Recorder in the document.
• The term Single-line diagram should be read as One-line diagram in the document.
• OFF is used for Disabled and On is used for Enabled in Settings.
• The term Isolator is used in the the HMI500 menus and the LHMI menus, and should be read as
Disconnector.
Section 1 1MRK 505 400-UUS Rev. B
Introduction
4Distributed busbar protection REB500
Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

Section 2 Safety information
GUID-7CDA9FB7-5CD6-4BD5-A1D2-AAB8E7BF87A3 v3
Dangerous voltages can occur on the connectors, even though the auxiliary voltage has
been disconnected.
Non-observance can result in death, personal injury or substantial property damage.
Only a competent electrician is allowed to carry out the electrical installation.
National and local electrical safety regulations must always be followed.
The frame of the IEDs has to be carefully grounded.
Whenever changes are made in the IEDs, measures should be taken to avoid
inadvertent tripping.
The IEDs contain components which are sensitive to electrostatic discharge.
Unnecessary touch of electronic components must therefore be avoided.
1MRK 505 400-UUS Rev. B Section 2
Safety information
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Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

6

Section 3 Signals
GUID-94D71C4D-4DF1-4966-ABD6-AC68BE63A7CB v2
3.1 Signal designations GUID-94F39517-0B09-41CF-A9C0-C233AA43A91E v3
The REB500 configuration assigns the signals to predefined inputs and outputs. Signals are designated
according to the following convention:
Table 1: Abbreviations used for different signal texts
Category Abbreviation
Bay unit BU_
Central unit CU_
General signals SYS_
Busbar protection signals BBP_
Breaker failure signal BFP_
End fault protection signal EFP_
Time-overcurrent protection signal OCDT_
Disturbance recorder signal DR_
Circuit breaker pole discrepancy protection signal PDF_
Low-voltage check feature UV_
Input I
Output O
Internal system signal SYS_INT
Table 2: Abbreviations used for various functions
Function Abbreviation
Busbar protection BBP
Breaker failure protection BFP
End fault protection EFP
Time-overcurrent protection OCDT
Disturbance recorder DR
Circuit breaker pole discrepancy protection PDF
Low-voltage check feature UV
A signal designation consists of a five digit signal number and a signal label, for example, 37205 Block
PDF.
1MRK 505 400-UUS Rev. B Section 3
Signals
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Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

Table 3: Signal numbers nomenclature
Digit 1
Category
Digit 2
Protection function
Digit 3
Signal function
Digit 4, 5
Sequence number
1 Input on Bay unit 0 INT 1 TRIP 05
2 Output on Bay unit 1 SYS 2 Block command 10
3 Input on Central unit 2 BBP 3 Tripping Signal 15
4 Output on Central unit 3 BFP 4 Blocking Signal 20
5 System Signal 4 EFP 5 Bus image and so on
5 OCDT 6 Control
6 DR 7 Start
7 PDF 8 General Alarm
8 UV
Table 4: Signal text nomenclature
Signal type Nomenclature Upper and lower case rules
Signal Input [Effect] [Function] [Phase] [Order]
For example,
Start BFP L1 1
Block BFP
[Effect] First letter upper case, other letters lower
case.
[Function] All letter upper case.
[Phase] [Order] Conform to national upper and lower
case conventions.
Signal Output [Function] [Effect] [Phase] [Order]
For example, BFP Trip L1
[Effect] First letter upper case, other letters lower
case.
[Function] All letter upper case.
[Phase] [Order] Conform to national upper and lower
case conventions.
Direct tripping
signals
[Function] [TRIP] [Phase] [Order]
For example,
BFP TRIP
SSS TRIP L1
[Function] All letter upper case.
[Phase] [Order] Conform to national upper and lower
case conventions.
Input signals that
can initiate
tripping
[Origin] [Location]
For example, Ext TRIP BB-Zone
no explicit rule
Output signals
used for transfer
tripping
[Function] [Target] [TRIP]
For example, BBP Remote TRIP
[Function] All letter upper case.
[Target] First letter upper case, other letters lower
case.
Following sections list binary input and output signals on bay units and central units. All signals are listed
in ascending order of their numbers in their respective filter groups.
Section 3 1MRK 505 400-UUS Rev. B
Signals
8Distributed busbar protection REB500
Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

3.2 Binary inputs on bay units GUID-D6989DA8-87EC-4663-9F09-7327E736720E v3
Table 5: BU general input signals
Signal Description
11105_External TRIP The tripping command received from another protection device(including
one in the remote station) which is used for the REB500 tripping contact to
trip faults, on a line or a power transformer.
11110_External TRIP BB zone Used when an external signal has to trip the entire bus zone to which the
feeder is connected (for example, an external BFP signal). Applied to all the
bay units of the bus zone and sections of busbars interconnected by
disconnector ( intertripping).
11115_Ext_Test_TRIP Activates the signal 21120_EXT_TEST_TRIP to operate several tripping
relays simultaneously.
11120_BP External TRIP Tripping signal generated by the feeder protection part. Trips faults on a line
or power transformer with the aid of the REB500 tripping contact. Tripping
thus takes account of the busbar configuration at the time.
To function correctly, the signal has to be assigned to a feeder.
The simplest arrangement corresponds to the assignment of the signal
11105_Ext. TRIP to feeders. If signal 11105_Ext. TRIP is not available, a
binary output has to be configured for 11120_BP External TRIP which is
then assigned to a feeder. The signal is activated by the feeder protection
directly and does not therefore appear as binary input signal.
11125_BP External TRIP BB zone This is a tripping signal generated by the feeder protection part which is
used to trip the entire bus zone to which the feeder is connected. The
tripping command is applied to all the bay units of the bus zone and
sections of busbars interconnected by disconnector ( intertripping).
11205_Block SP A signal applied to this input blocks the local station protection functions
(BFP, EFP, OCDT and PDF), External Trip, tripping by the busbar protection
and intertripping of the respective bay unit. The Bus Bar Protection
continues to be active as a system function. The primary injection of the
concerned bay unit can lead to a trip of the respective zone.
11210_Block output relays All the output contacts configured for a bay unit are blocked.
11215_Ext. measuring disturbed This signal is active when invalid analogue values are received from an
external device. The busbar protection (that is, the specific protection zone
of the busbar) and all the local protection functions are blocked. If the
disturbance lasts longer than 400 ms, diagnostic events are generated
(BBP Minor Error 9 and BBP Minor Error 20). This input should only be
used in special cases and only when engineering a REB500 system.
11505_Close command CB The circuit breaker close command is needed by the busbar and end fault
protection in bus-tie breaker and configured feeder bay units to control the
REB500 measuring system.
11510...11525_Supervision aux.
voltage_x
The supervision of the auxiliary supply is configured when the compliance
of the auxiliary contacts on the disconnectors with the required switching
sequence and cannot be guaranteed for this reason, the Not OPEN =
CLOSED logic has to be used. These signals ensure that the protection
responds correctly should the auxiliary supply to the disconnectors fail.
This signal is only applicable in the case of Not OPEN = CLOSED.
The supervision signals affect all switchgear objects or associated with this
BU independent of the respective supervision voltage levels.
11530_Isolator/Breaker Position The position of a circuit breaker or disconnector is signaled by one or two
auxiliary contacts.
Table continues on next page
1MRK 505 400-UUS Rev. B Section 3
Signals
Distributed busbar protection REB500 9
Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

Signal Description
11605_External release Trip Providing they have been configured, a signal applied to this input enables
tripping by the busbar protection and the intertripping function in the bay
unit (AND logic of tripping and enabling signals). The input has no influence
on other protection functions. This input can be used in special cases to
interlock tripping by the protection by, for example, an external
undervoltage relay.
11610_External reset Tripping commands and signals can be configured to latch after picking up,
in which case they must be reset by applying a signal to this input.
It also resets the text display and LED’s on the local control unit. A reset
signal resets the entire system.
11615, 11625, 11635,
11645_Inspection_x-Off
These inspection inputs (x = 1 to 4) activate the disconnector or circuit
breaker inspection mode for the cases 1 to 4.
As with the disconnector inputs for the busbar image, two anti-coincident
signals can be connected to these inputs. If the status of both inputs is
identical, this is interpreted as an error. The last valid position is maintained
and the LHMI on the bay unit indicates the error message Insp. Alarm x (x=
1 to 4 corresponding to the number of the inspection input).
These signals are only used when anticoincidence supervision of the
inspection inputs is specified. The signal pairs in Table 6 result in relation to
the inspection cases.
11620, 11630, 11640,
11650_Inspection_x-On
These inspection inputs (x = 1 to 4) activate the disconnector or circuit
breaker inspection mode. They are only used both in cases where there is
only one inspection signal (without anticoincidence supervision) and where
there are anticoincidence signals (with anticoincidence supervision) (see
Table 6).
11655_Maintenance-Off Anti-coincident maintenance input. Refer to the description for the
Inspection_x-Off signals. If the status of both inputs is identical, the LHMI
on the bay unit indicates MaintenanceAlarm.
11660_Maintenance-On This input is excited by the maintenance function. It is used should only one
maintenance signal be available.
11765_General Start DR This signal shall be configured in the bay unit and defined as a DR trigger,
so that the DR function of the bay unit is basically able to be started by the
following input signals for General Start of the DR:
•36705_General Start DR
•16750_Start DR_10 or 16760_BP General Start DR
Without this signal, the bay unit will not respond to a General Start DR .
This signal is used during General initiation as system
internal link between General Start input-signals and
the DR function. It may not be configured onto an
optocoupler input. This is achieved by setting the
HMI500 menu item Configuration /Binary Module /
Inputs /Details /Contact mode to No auxiliary
contact.
11840…11885_GP_In_x With a properly configured event configuration, the input signal can be
transmitted via LON or IEC 103 and displayed on the control system. It is
also possible to display the state of the signal on the local HMI LED’s of the
bay unit.
Section 3 1MRK 505 400-UUS Rev. B
Signals
10 Distributed busbar protection REB500
Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

Table 6: Signal pairs supervised for anticoincidence
Status Inspection 1 Inspection 2 Inspection 3 Inspection 4
OPEN 11615 11625 11635 11645
CLOSED 11620 11630 11640 11650
Table 7: BU input signals for BFP, EFP, OCDT, and PDF
Signal Description
12605_Bypass Check Zone The check zone criterion for the release of the bus bar protection is bypassed.
13205_Block BFP Blocks operation of BFP for the corresponding bay unit. When the blocking signal
is cancelled, the timers start again at t = 0.
13210_BP Block BFP Blocks operation of BFP of the corresponding feeder. When the blocking signal is
cancelled and providing an initiating signal is present and current is flowing, the
timers start again at t = 0.
13605_Trip redirection _1 The circuit breaker sets this input when it cannot open, that is because the air
pressure is too low or there is a leak in the case of GIS (Alarm Stage 3 - Circuit
breaker blocked). A tripping signal is then transferred to the adjacent breakers
(busbar trip) and possibly the remote station.
13606_Trip redirection_2 Reserved for special applications.
If this signal is set then the trip redirection is active in the same way as it is for the
13605_Trip redirection _1.
This signal must not be used for pressure low input from circuit breaker.
13610_BP Trip transfer Reserved for special applications.
This Bay Protection (BP) signal allows triggering the trip redirection functionality if
the signal 13605_Trip redirection _1 or 13606_Trip redirection_2 is active.
This signal is directly activated by BP and does not therefore appear as a binary
input signal.
13705_External Start BFP A signal applied to this input initiates the breaker failure protection timer
(independently of the overcurrent measurement).
13710...13735_Start BFP Lp_x Phase-selective (p = 1 to 3) initiation of the breaker failure protection with two
inputs per phase (x = 1 to 2). The breaker failure timer is started by this input
signal providing the current in the respective phase is above pick up.
13740...13765_Start BFP
L1L2L3_x
Three-phase initiation of BFP by six inputs (x = 1 to 6). The BFP timer is started by
a signal at one of these inputs providing the current in at least one phase is high
enough.
13761_BP Start BFP L1L2L3_5 Functionally identical to signal 13760_Start BFP L1L2L3_5 but directly activated
by the bay protection unit and not appearing as binary input signal.
13770...13780_BP Start BFP Lp BFP with phase-selective initiation (p = 1, 2, or 3). The BFP timer starts when this
signal is activated by the bay protection function and the BFP measures a current
in the corresponding phase.
13785_BP Start BFP L1L2L3 BFP with three-phase initiation. The BFP timer starts when this signal is activated
and the BFP measures a current in any phase.
13790_BP External Start BFP B BFP with three-phase initiation. The BFP timer starts when this signal is activated
regardless of the current measurement.
13795...13796_Start BFP L0_x L0-initiation of BFP with two inputs (x = 1 or 2). The BFP timer is started by this
input signal providing the current in the neutral system is above pick up.
13797_BP Start BFP L0 Breaker failure protection with L0 - initiation. The breaker failure protection timer
starts when this signal is activated by the bay protection function and the BFP
measures a current in the neutral system.
Table continues on next page
1MRK 505 400-UUS Rev. B Section 3
Signals
Distributed busbar protection REB500 11
Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

Signal Description
13805_Start BFP Q0 no I_1
13810_Start BFP Q0 no I_2
The BFP timer starts when this signal is activated and the Breaker
(11530_Breaker Position) is closed and valid (independently of the overcurrent
measurement).
14205_Block EFP Blocks operation of EFP for corresponding bay unit. When the blocking signal is
cancelled, the timers start again at t = 0.
14405_BP EFP Manual Close This signal is set by the bay protection when the circuit breaker receives a close
command to prevent EFP from tripping.
14605_EFP ext release_1
14610_EFP ext release_2
Providing this input is configured, EFP is enabled by an external signal.
15210_Block OCDT Blocks operation of OCDT. When the blocking signal is cancelled, the timer starts
again at t = 0.
17205_Block PDF Blocks operation of PDF. The timers start at t = 0 when the input resets.
17610_PDF ext release Providing this input is configured, PDF is enabled by an external signal.
Table 8: BU input signals for disturbance recorder (DR)
Signal Description
16705...16750_Start DR_x The disturbance recorder function is triggered by an external signal applied to one
of these 10 inputs (x = 1 to 10), or they can be simply used for recording
purposes. The external signal may come, for example, from the tripping contact of
a bay protection relay or the pick up contact of a time-overcurrent relay.
Optocouplers are configured for these inputs.
The signal 16750_Start DR_10 is also transferred to the central unit where it
initiates the General Start (of all disturbance recorders with appropriate
configuration).
To ensure this functionality, the following additional signals must be configured and
defined as a trigger under the DR:
• For the start of the DR of the central unit the CU output signal 46705_DR
general started
• For the start of the DR of the bay units the BU input signal 11765_General
Start DR
16760_BP General Start DR This signal is used to trigger all appropriately configured disturbance recorders in
the system (General start disturbance recorders). To ensure this functionality,
the following additional signals must be configured and defined as a trigger under
the DR:
• For the start of the DR of the central unit the CU output signal 46705_DR
general started
• For the start of the DR of the bay units the BU input signal 11765_General
Start DR
This signal is directly activated by the bay protection unit and
does not therefore appear as a binary input signal.
Table 9: BU input signals for voltage release (UV)
Signal Description
18205_Fuse failure superv. UV Provision is made for a tripped MCB to apply a signal to the input 18205_Fuse
failure superv. UV and enable tripping of the protection zone concerned.
Section 3 1MRK 505 400-UUS Rev. B
Signals
12 Distributed busbar protection REB500
Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

Table 10: BU input signals for bay protection
Signal Description
19205_Block BP Blocks the protection output signals of the respective bay unit. Internal processing
of the functions continues and therefore measurements and signals continue to be
displayed on the local HMI.
19600_Activation BP ParSet_1 The protection functions and settings assigned to parameter set 1, 2, 3, or 4,
respectively, are active. They remain active after the signal has been reset.
19605_Activation BP ParSet_2
19610_Activation BP ParSet_3
19615_Activation BP ParSet_4
BP input signals available for
configuration
In addition to the bay protection input signals in this table, which are always
available, use can also be made of the signals configured for the binary signal
input block of the bay protection. The number of these signals depend on the
protection functions and signals included in the bay protection.
3.3 Binary outputs on bay units GUID-0A2887D5-4FDF-44CE-B2D4-B9E196CCD6C2 v4
Table 11: BU general output signals
Signal Description
21105_EXTERNAL TRIP Tripping command generated by the external input 11105_EXTERNAL TRIP.
21110_TRIP Tripping command generated by the station protection intertripping function (BBP,
BFP t2 etc).
21115_REMOTE TRIP Any of the protection functions that are capable of tripping an entire section of
busbar (intertripping) can initiate transfer trip to a remote trip signal. Protection
functions of this kind are: BBP, BFP, EFP, or the command EXTERNAL TRIP.
Remote tripping can only take place if a fault cannot be cleared by the circuit
breaker in the bay concerned. This applies in the following cases:
• 1½ breaker schemes
• Bypass operation with the bus tie breaker being used for a feeder
• Circuit breaker bypassed by a disconnector
• Feeder not equipped with an own circuit breaker
More details on special application cases are given in the Application Manual.
21120_EXT_TEST_TRIP Generates a multi-pole trip for test purposes. Either controlled by the binary input
signal 11115_Ext_Test_TRIP, or by the LHMI Test Trip menu.
If both, the 11115_Ext_Test_TRIP and LHMI Test Trip function are configured and
used simultaneously, 21120_EXT_TEST_TRIP results in an OR function of both
possible inputs.
Please refer to Operation Manual for further information about the LHMI Test Trip
function.
21125_TRIP Combined general tripping command summarizes the general tripping commands
of station protection and bay protection functions (if existing). For details about
combined tripping commands see Section 3.8.
21130_TRIP L1 Combined tripping command summarizes the phase L1 tripping commands of
station protection and bay protection functions (if existing). For details about
combined tripping commands see Section 3.8.
21135_TRIP L2 Combined tripping command summarizes the phase L2 tripping commands of
station protection and bay protection functions (if existing). For details about
combined tripping commands see Section 3.8.
Table continues on next page
1MRK 505 400-UUS Rev. B Section 3
Signals
Distributed busbar protection REB500 13
Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved

Signal Description
21140_TRIP L3 Combined tripping command summarizes the phase L3 tripping commands of
station protection and bay protection functions (if existing). For details about
combined tripping commands see Section 3.8.
21145_TRIP L0 Combined tripping command summarizes the phase L0 tripping commands of
station protection and bay protection functions (if existing). For details about
combined tripping commands see Section 3.8.
21150_REMOTE TRIP Combined general Tripping command summarizes the remote tripping commands
of station protection and bay protection functions (if existing). For details about
combined (transfer trip to remote) tripping commands see Section 3.8.
21305_Trip Signals tripping by the bay unit and can be set by any of the station protection
functions.
21405_SP blocked Signals that the station protection functions including EXTERNAL TRIP (transfer
trip and intertripping) are blocked (either the bay concerned or throughout the
station).
21410_Output relays blocked All the output contacts configured in the bay unit concerned are blocked.
21805_In service Signal set by the diagnostic function that shows whether or not a bay unit is
operational (For details, see Section 3.7.2).
21810_Loss of supply voltage This signals a failure of the disconnector auxiliary supply (Supervision aux.
voltage_x) in the bay unit.
21815_Inspection/maintenance This signal appears when an inspection or maintenance input is set in the bay unit
and a position indicator on a disconnector or circuit breaker connected to the bay
unit is forced into a particular status.
Forcing of a disconnector or circuit breaker in this context means: The item of
switchgear changes either from CLOSED to OPEN or from OPEN to CLOSED.
21820_Alarm Signals an alarm situation in a bay unit: if an auxiliary supply fault is being signaled
or if a bay unit diagnostic system has detected an analogue signal processing
error.
21855_Main PSM missing The diagnostic function sets this signal if the main power supply module is
missing.
21860_Red PSM missing The diagnostic function sets this signal if the redundant power supply module is
missing.
21865_Main PSM HW failure The diagnostic function sets this signal if a hardware failure has been detected on
the main power supply module, e.g. the module is defect.
21870_Red PSM HW failure The diagnostic function sets this signal if a hardware failure has been detected on
the redundant power supply module, e.g. the module is defect.
21875_Main PSM Power Failure The diagnostic function sets this signal if a power loss has been detected on the
main power supply module.
21880_Red PSM Power Failure The diagnostic function sets this signal if a power loss has been detected on the
redundant power supply module.
In Table 12, the column T signifies the type of the signal: ● are considered for trip output while ○ are
considered for signalization purpose. Column L shows whether the signal additionally appears in the trip
list (●), in the alarm list (○), or in no list (-).
Section 3 1MRK 505 400-UUS Rev. B
Signals
14 Distributed busbar protection REB500
Technical manual
© 2020 - 2022 Hitachi Energy. All rights reserved