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ABB RELION REB500 Applications Manual

Distributed busbar protection, version 8.3 iec
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RELION
REB500
Distributed busbar protection REB500
Version 8.3 IEC
Application manual
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Summary of Contents for ABB RELION REB500

  • Page 1 ® RELION REB500 Distributed busbar protection REB500 Version 8.3 IEC Application manual /t1ain m1:nu /Main menu i!9? Events t�, � ;;: :: Measu remen ts Distu rbance records Setti rlgS Settings conf i� ation rua,gr,o stics rests O•� L¥19"39f� joi,je ct name j$sup erUs er 10:5 3:.10 2013 -03- 30...
  • Page 3 Disturbance records SettirlgS Settings confi� ation rua,gr,o stics rests O•� L¥19"39f� joi,ject name j$superUs er 3:.10 2013-03- 3010:5 I D I Document ID: 1MRK 505 399-UEN Issued: May 2019 Revision: B Product version: 8.3 © Copyright 2019 ABB. All rights reserved...
  • Page 4 Copyright This document and parts thereof must not be reproduced or copied without written permission from ABB, 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.
  • Page 5 This document has been carefully checked by ABB but deviations cannot be completely ruled out. In case any errors are detected, the reader is kindly requested to notify the manufacturer.
  • Page 6 (Low-voltage directive 2006/95/EC). This conformity is the result of tests conducted by ABB in accordance with the product standards EN 50263 and EN 60255-26 for the EMC directive, and with the product standards EN 60255-1 and EN 60255-27 for the low voltage directive.

  • Page 7: Table Of Contents

    Starting or restarting the system..................23 6.2.2 Hardware supervision......................23 6.2.2.1 Supervising the auxiliary supply..................23 6.2.2.2 Microprocessor program and main memories.............24 6.2.2.3 Supervision of the tripping relay coils................24 Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 8 8.6.2.4 Influence of the phase comparison function..............49 8.6.2.5 Summary..........................49 8.6.3 Busbar fault with through current..................49 8.6.3.1 Case a: Through current....................49 8.6.3.2 Case b: Loop current......................51 Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 9 Neutral current I caused by an open CT circuit............77 10.4.1.3 CT inaccuracies........................78 10.4.2 Time grading for BFP L0 system...................78 10.5 External start of BFP........................78 Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 10 BBP and BFP in stations with a bypass busbar..............95 13.2 Busbars with bus-ties in series....................95 13.3 Switchgear bays as bus-tie or feeder circuit-breaker............98 13.4 Control using 11105_External TRIP..................99 13.4.1 1½ breaker scheme........................99 Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 11 Table of contents 13.4.2 Bypass mode..........................99 13.4.3 Bypass isolator........................100 Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 13: Introduction

    Getting started guide 1MRK 505 404-UEN Symbols and conventions 1.4.1 Symbols GUID-4F7DD10A-DEE5-4297-8697-B8AAB5E3262F v2 The electrical warning icon indicates the presence of a hazard which could result in electrical shock. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 14: Document Conventions

    For example, the default value of the • Section references are presented with the respective section numbers. For example, see Section 1.4.2 for more details about document conventions. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 15: Safety Information

    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 touching of electronic components must therefore be avoided. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 17: Overview

    It is possible to apply REB500 system without making use of its basic busbar protection function (for example, as an independent breaker failure and end zone protection). Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 18 IEC18000251 V1 EN-US Figure 1: Single busbar 12000002-IEC18000252-1-en.vsd IEC18000252 V1 EN-US Figure 2: Double busbar Transfer busbar 12000003-IEC18000253-1-en.vsd IEC18000253 V1 EN-US Figure 3: Double busbar with transfer busbar Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 19 1MRK 505 399-UEN B Section 3 Overview 12000004-IEC18000254-1-en.vsd IEC18000254 V1 EN-US Figure 4: 1½ breaker scheme 12000005-IEC18000255-1-en.vsd IEC18000255 V1 EN-US Figure 5: Ring busbar Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 20 Section 3 1MRK 505 399-UEN B Overview 12000006-IEC18000256-1-en.vsd IEC18000256 V1 EN-US Figure 6: Duplex station Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 21: Software

    GUID-D0336E66-95D7-4861-AC55-94F6113C510A v1 The REB500 system can be integrated in a station monitoring system (SMS). Refer to the description of the station monitoring system (SMS) for further details. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 22: Station Automation System (Sas)

    GUID-5E46D13F-13DB-4B1F-B6D7-A49C9E230C78 v1 The REB500 system can be integrated in a station automation system (SAS). Refer to the description of the station automation system (SAS) for further details. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 23: Signal Acquisition And Processing

    Basically it uses the maximum value detected in the sampling window should a CT saturate. By prolonging the maximum value, the signal is compensated such that the best possible approximation of the phase-angle and amplitude of the unsaturated signal is achieved. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 24: Binary Inputs

    Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 25: Binary Outputs

    Binary outputs GUID-B15ED000-FA5B-4CDD-84B8-C0BEF003BF37 v2 The bay units generate two kinds of binary output signals, tripping commands and logic signals. The central unit only generates logic signals. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 26 For example, the signals 21305_Trip and 21105_EXTERNAL TRIP cannot be configured to operate the same output contact. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 27: Self-Supervision

    (CT supervision) and the positions of the auxiliary contacts on isolators and circuit-breakers (busbar replica). Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 28: Software Supervision

    A number of supervised criteria ensure the integrity of the data transferred via the process bus. All data transferred via the process bus are subject to cyclic redundancy checks as part of the Ethernet transmission. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 29: Supervision Of The Protection Functions

    The power supply units in the central and bay units are supervised with respect to their permissible variations. An auxiliary supply voltage that is out of tolerance counts as a major error, that is, the protection system is shut down and restarted. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 30: Microprocessor Program And Main Memories

    Bay units with change of current 12000036-IEC18000260-1-en.vsd IEC18000260 V1 EN-US Figure 10: Plausibility check releases BBP-TRIP The busbar protection is not permitted to trip if this condition is not fulfilled. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 31 However, if more than one bay unit is connected Test mode for the duration of to a zone, REB500 should be switched to the the test. The plausibility check then cannot falsify the test results. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 32: Internal Analogue Measurement Supervision

    Bay Unit REB500 Analogue part Analogue measurement supervision   = -I    14000050-IEC18000350-1-en.vsd IEC18000350 V1 EN-US Figure 14: External wiring mandatory for the analogue measurement supervision Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 33: Secondary Injection Tests

    Test mode . The internal analogue measurement supervision then cannot falsify the test results. The wiring of the neutral path (I ) is not necessary for this mode. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 35: System Settings

    This procedure is repeated until all the sections of the busbar have been determined. Topological items are: • busbars • isolators and longitudinal isolators • circuit-breakers • • bus-tie breaker CTs Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 36: Isolator And Circuit-Breaker Positions

    The statuses of the auxiliary contacts on the isolators and circuit-breakers reflect the statuses of the latter (CLOSED or OPEN). Each of these statuses is represented by an independent signal (one for CLOSED and one for OPEN). Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 37: Supervising Isolator And Circuit-Breaker Statuses

    The switching sequence and wiring are described in the Manual . 7.2.3 Evaluating the isolator and circuit-breaker statuses GUID-088605A8-4AB8-4260-9AB9-1F9829444184 v1 The isolator and circuit-breaker statuses are evaluated as follows: Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 38: Isolator Alarm

    If the isolator alarm was initiated by an isolator or circuit-breaker that at the time determined the assignment of protection zones, the Switch inhibit signal is also set. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 39: Acknowledging The Isolator Alarm

    (for example, a mechanical defect), a wiring error or incorrect simulation, station operating guidelines must specify whether the protection should be blocked (danger of failing to trip) or be reset (danger of mal- operation). Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 40: Note On Isolators And Circuit-Breakers

    Operation of HMI500 running on a PC connected to the bay unit and the local HMI is limited and they take longer to respond. Events, disturbance recorder records, the binary inputs and outputs and currents and voltages can be viewed. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 41: Emergency Bay Unit Operation

    When communication is re-established, a bay unit resumes normal operation without having to be restarted. Enabling the tripping command GUID-751CFBD8-F045-4ABF-B99F-EE9551CB3596 v1 For special applications, tripping commands can be interlocked by enabling signals. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 43: Busbar Protection

    If the CT’s saturate at the minimum fault current, the feeder currents have to be reduced by an empirically determined factor CR. The corrected current values form the basis for calculating the setting for IKmin. The reduction factor CR is calculated as follows: Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 44: Application Example

    5P20 6 VA 6 VA 5 VA 8 VA 10 VA 20 VA 10 VA+5 VA    13.6 6VA+5 VA (Equation 3) IECEQUATION18075 V1 EN-US Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 45 Differential current setting (I∑ I I) Restraint (through fault) Kmin Restraint current (∑ I I I) 12000133-IEC18000279-1-en.vsd IEC18000279 V1 EN-US Figure 18: Operating characteristic of restrained amplitude comparison Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 46: Safety Aspects Of The Measuring Principle

    The preprocessing of the current signals in the bay units enables the protection algorithms to detect faults discriminatively in all cases (even in the presence of CT saturation). Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 47: Restrained Amplitude Comparison

    L of feeder n fundamental component after the Fourier filter in phase total number of feeders and bus-tie breakers per protection zone Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 48 IEC18000269 V1 EN-US Figure 21: Internal fault Applying the equation above to Figure 21 yields:   5 5 0     (Equation 12) IECEQUATION18084 V1 EN-US Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 49: Operating Characteristic

    The following operating characteristic results: 12000053-IEC18000473-1-en.vsdx IEC18000473 V1 EN-US Figure 23: Operating characteristic of the restrained differential current measurement in HMI500 The operating area is above the bold line. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 50: Restrained Amplitude Comparison With Ct Saturation

    CTs Ratio 200 A / 1 A 400 A / 1 A Class 5P10 5P20 6 VA 6 VA 5 VA 8 VA 10 VA 20 VA Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 51 ): 802 A Kmin k is normally set to 0.80. Numerous tests on a network model have shown this The factor setting to be the most favorable. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 52: Phase Comparison

    The function compares the phase-angles of the fundamental components of the feeder currents. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 53 Typical settings are 0.8 for the phase currents and 0.25 for the neutral current. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 54: Case Studies: Busbar Layouts

    8.6.2.3 Case c: CT circuit fault on Bay 3 GUID-B5016D5C-8CD2-4E33-9FD7-E12DCA536C4B v1 ΔI and k are lower: This case corresponds to the previous case, but the values for Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 55: Influence Of The Phase Comparison Function

    8.6.3.1 Case a: Through current GUID-41C36F39-B87D-4E5B-8403-710D542DA8BF v2 Busbar fault I K1 I K2 I K3 12000136-IEC18000282-1-en.vsd IEC18000282 V1 EN-US Figure 28: Busbar fault with through current I Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 56 . This must be determined when engineering the scheme. An alternative is to disable the phase comparison function, which also must be determined when engineering the scheme. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 57: Case B: Loop Current

    CTs • faulty CTs • wrong CT ratios • incorrectly wired CT (wrong current directions and therefore phases) • wrong isolator and circuit-breaker return confirmation signals Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 58 (protection zone) concerned. Intertripping (see Section 7.1) by other protection functions is still possible. • Block protection completely Operation of the entire protection system is blocked. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 59: Special Applications Of Bbp

    CT that encompasses all three-phase conductors. Where CTs of this type are not available, the neutral current is derived by vectorially adding the three-phase currents (Holmgreen circuit). Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 60 Finally, the harmonic level is monitored to ensure that the neutral current is only evaluated providing the measurement is uninfluenced by CT saturation. This feature also prevents the evaluation of the neutral current during transformer inrush currents. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 61 Instructions for calculation and the requirements to be fulfilled by the CTs are given in detail in Ground fault protection for high voltage busbars (1KHL020319- the application description Aen). Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 62: Blocking Measurement Of Certain Cts

    The CTs are not assigned to a protection zone when the bus-tie breaker is open and therefore the protection zones extend to the bus-tie breaker itself. The correct zone can thus be tripped for a fault between the CTs and the bus-tie breaker. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 63: In The Event Of A Protection Function (Bbp, Bfp Or Efp) Tripping This Cb

    CTs. The function is the same as for bus-tie breakers with a single set of CTs. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 64: Short-Circuiting Of A Ct

    (Ik12). If included, the bus-tie breaker current (Ik12) would be represented by the two vectors with opposing directions (V+, V-) and assigned to the common measuring system (S1/S2). The consequence would be that the: Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 65 3A and 3B are combined to a single measuring system (3A/3B). The problem is thus also the same and the bus-tie breaker measurement must also be blocked. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 66: Feeder Circuit-Breakers

    Blocking the measurement is unnecessary for a CT on the busbar side of the circuit-breaker (see Figure 37), because the fault is outside the busbar protection zone and can only be detected and tripped by the end fault protection. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 67: Breaker Reclaim Time

    The circuit-breaker is opened (see Section 9.2.1.1). One of the protection functions (BBP, BFP or EFP) issues an internal intertripping command to the respective circuit-breaker (see Section 9.2.1.2). Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 68: Example Of When The Reclaim Time Is Set Too Short

    This is achieved by activating the busbar protection input signal 11505_Close command CB. The CLOSE CB command instantly cancels any previous blocking of measurement regardless of all other criteria. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 69: Example Of A Close Cb Signal Which Was Not Registered

    BBP. Similar to the selective zone BBP the CzBBP is operated as a differential protection. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 70: Protection Zones

    Before the check zone sends a release signal to the selective zone busbar protection, the k must be attained. configured values of the check zone (CzBBP) values , and Diff Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 71: Differential Current (I Diff )

    9.3.2.3 Operating characteristic GUID-3BDBF1FD-A6A1-41E5-9DD9-BDC8DC142AF0 v1 This results in the following operating characteristic for CzBBP: The region above the thick line is the operating zone. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 72: Check Zone

    One or more bay units out of operation (that is, switched off, loss of power, or device error), results in absence of important measurements categories. A complete check zone Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 73: Application Of Check Zone Protection

    9.2.3), which should be equated to a bypass of the check zone system. This binary input should be connected to closing the contact of the Feeder in bypass operation . customary selector switch Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 74: Maintenance Conditions In Connection With Czbbp

    If it is desired that the check zone protection be bypassed (enabled) in the modification or maintenance mode, the signal 12605_Bypass Check Zone must be activated in addition to the input 11620_Inspection_1-On or 11660_Maintenance- On. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 75: Breaker Failure Protection (Bfp)

    CTs. This is calculated from the effective overcurrent factor     (Equation 31) IECEQUATION18106 V1 EN-US      (Equation 32) IECEQUATION18107 V1 EN-US Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 76 0.8 450        min 0.99, min 0.99, 0.6   (Equation 36) IECEQUATION18111 V1 EN-US Hence, in this example we could set: Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 77: Linearized Current Transformers (Tpz)

    . The circuit-breaker successfully interrupts the fault current before the end of this time and the overcurrent function resets. A backup tripping command is not generated (BFP t Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 78: Case 2: Backup Trip By Bfp

    At the end of the timer settings t and the internal processing time t intertripping of the surrounding circuit-breakers takes place to isolate the fault. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 79: Timer T 1 Setting

    , the minimum setting of the timer t must be longer than the maximum time required for a backup trip plus the maximum reset time of the overcurrent function. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 80: Maximum Time T 1Max For Backup Tripping

     40ms 24ms 1 9ms 20ms 103ms (Equation 42) IECEQUATION18118 V1 EN-US 10.2.7 Maximum time t for intertripping 2max GUID-E885FD25-5A8A-4209-8F10-F73A928AFC1E v1 (at minimum t and t settings) Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 81: Logic Type

    BFP L0 system will issue a three phase trip. There are three options to obtain a neutral current 3I0 for the BFP L0 system : • Usage of a core balance transformer Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 82: Neutral Current I Caused By Ct Saturation

    In case one or more CTs saturate, the summation of the three phase currents will not lead to a correct representation of the residual current in the primary system: Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 83: Neutral Current I Caused By An Open Ct Circuit

    Bay Unit REB500 0 12000176-IEC18000304-1-en.vsd IEC18000304 V1 EN-US Figure 50: I in case of an open CT connection Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 84: Ct Inaccuracies

    Active for CB open is disabled, the timers t and t are not started when the circuit-breaker is open, that is, the breaker failure function is disabled. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 85: Bfp Start Input Supervision

    1MRK 505 399-UEN B Section 10 Breaker failure protection (BFP) Active for CB open function is determined by ABB when engineering The setting the system and cannot be changed subsequently. Where breaker failure shall be disabled when circuit-breaker is open this setting has to be defined when system is initially engineered.
  • Page 86 Section 10 1MRK 505 399-UEN B Breaker failure protection (BFP) 18000079-IEC19000480-1-en.vsdx IEC19000480 V1 EN-US Figure 51: Enable BFP start input supervision Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 87: Additional Protection Features

    Figure 52: Examples 1, 3 and 5: BBP enable 11.1.1.2 Solution GUID-3EECE333-AC4B-42BF-97E8-EB14387F4E79 v1 The enabling signals from the external undervoltage relays are connected to the respective 31805_External release BB zone input signal. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 88: Result

    GUID-87BFCF83-E439-40AC-A45A-1E9CE4385D80 v1 11.1.2.1 Problem GUID-113A62AB-81FB-403F-80F4-B126DC5CC7C6 v1 In a solidly grounded power system, transfer tripping by the EFP has to be interlocked by the internal undervoltage function. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 89: Solution

    EFP function in the same bay unit, which sends a transfer tripping command to the protection at the remote end of the line. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 90: Example 3: Bbp Tripping Enabled By The Internal Undervoltage Function

    In a solidly grounded power system, tripping by the BBP has to be interlocked by the internal undervoltage criterion, but there are no VTs to measure the voltage on the busbars. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 91: Solution

    In the event of a fault on a given busbar section (for example, BB1), the busbar protection function for BB1 trips. A fault on a busbar section will normally cause a voltage collapse, which Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 92: Example 5: Bbp Neutral Measuring System Enabled By The Internal Undervoltage Functio

    BB1 trips. A ground fault on a busbar section will normally cause a voltage collapse, which is detected by the internal undervoltage function for BB1. REB500 then isolates BB1. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 93: 1½ Breaker Schemes And Duplex Stations

    32 independent protection zones, each processed by the busbar protection algorithms (current restrained differential and phase comparison protection). Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 94: 1½ Breaker Scheme With 3 Cts Per Diameter

    If the VT on A1 is on the line side of the isolator Q6, the distance protection is unable to protect the T zone (X) when the isolator Q6 is open, because the voltage it needs for measurement is either missing or wrong. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 95: Transformer Feeder

    2 as to version 1. Since each diameter is equipped with 6 CTs, the protection zones can be arranged to overlap and an additional end fault protection is not needed. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 96: 1½ Breaker Scheme With 5 Cts Per Diameter

    Compared with a high-impedance scheme, REB500 does not require the main CTs to fulfill such high demands. • Less wiring because busbar, breaker failure, end fault and T zone protection functions are all in the same unit. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 97: 1½ Breaker Scheme With 8 Cts Per Diameter

    The advantage is that the failure of a system or during maintenance only one protection system is affected. Safe operation of the Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 98: Duplex Station

    For operating mode 5, the feeder isolators Q1 and Q2 are open and isolator Q6 is closed and therefore, a single measuring system X//Y is formed that discriminatively protects zone X-Y. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 99: Assignment Of Bay Units

    Bay 2 Bay 3 Bay 4   Bay 5                 14000014-IEC18000326-1-en.vsd IEC18000326 V1 EN-US Figure 65: Assignment of bay units Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 101: Complex Stations

    1½ breaker diameters being paralleled. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 102 This consists in defining the starting and finishing points of series ties and not evaluating measurements between them when both are in the same measuring zone. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 103 S1/S2/S3 is created in which all faults are correctly detected. A drawback, however, is that discrimination is lost for busbar S2 while S1 and S3 are in parallel. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 104: Switchgear Bays As Bus-Tie Or Feeder Circuit-Breaker

    Switchgear bays as bus-tie or feeder circuit-breaker GUID-98077D4D-CF3F-46A8-A2CF-298A7CD29BF4 v2 Some circuit-breakers are designed to be used both as a bus-tie and feeder circuitbreaker. Figure 72 shows an example. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...

  • Page 105: Control Using 11105_External Trip

    An External TRIP signal applied to circuit-breaker Q0 controlling Feeder 1 does not isolate the fault when isolator Q7 is closed (bypass mode). For this reason, circuit- breaker Q0 controlling Coupler 2 is automatically opened. Through-faults can now be correctly tripped. Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 106 Q7 is closed. The busbar protection then intertrips busbar 3 to finally clear the fault.     Busbar 1   Busbar 2   Busbar 3       Feeder 1 14000023-IEC18000333-1-en.vsd IEC18000333 V1 EN-US Figure 74: Bypass isolator Distributed busbar protection REB500 Application manual © Copyright 2019 ABB. All rights reserved...
  • Page 108 ABB AB Grid Automation Products SE-721 59 Västerås, Sweden Phone +46 (0) 21 32 50 00 Scan this QR code to visit our website www.abb.com/protection-control © Copyright 2019 ABB. All rights reserved.

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