IEEE C37.234 2009

$76.92

IEEE Guide for Protective Relay Applications to Power System Buses

Published By	Publication Date	Number of Pages
IEEE	2009	127

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Description

New IEEE Standard – Active. Concepts of power bus protection are discussed in this guide. Consideration is given to availability and location of breakers, current transformers, and disconnectors as well as bus-switching scenarios, and their impact on the selection and application of bus protection. A number of bus protection schemes are presented; their adequacy, complexity, strengths, and limitations with respect to a variety of bus arrangements are discussed; specific application guidelines are provided. Breaker failure protection is discussed as pertaining to bus protection. Means of securing bus protection schemes against corrupted relay input signals are also included.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C37.234-2009 Front cover
3	Title page
6	Introduction
7	Notice to users Laws and regulations Copyrights Updating of IEEE documents Errata Interpretations
8	Patents Participants
11	Contents
13	Important notice 1. Overview 1.1 Scope 1.2 Purpose
14	2. Normative references 3. Definitions
16	4. Buses in various station arrangements 4.1 Single bus
19	4.2 Main and transfer bus
21	4.3 Double-bus double-breaker
22	4.4 Double-bus single-breaker
24	4.5 Breaker-and-a-half
25	4.6 Ring bus
26	4.7 Other bus arrangements
27	5. Introduction to bus protection 5.1 Zones of bus protection
31	5.2 Types of bus protection
34	5.3 Considerations for bus scheme selection
39	6. Relay input sources 6.1 Current transformers
42	6.2 Position of disconnect switches and breakers
44	6.3 Voltage transformers
45	7. Bus protection methods 7.1 Differential methods
68	7.2 Zone-interlocked schemes
72	7.3 Fault bus schemes
73	8. Application of bus protection schemes 8.1 Partial differential protection
75	8.2 Combined bus and transformer protection
76	8.3 Protection of buses with directly connected grounding transformers
78	8.4 Application of auxiliary current transformers
79	8.5 Applications with paralleled current transformers
81	8.6 Application of auxiliary tripping relays
82	8.7 Automatic reclosing after bus faults 8.8 Dynamic bus replica
85	8.9 Voltage trip supervision
86	8.10 Check zone
88	8.11 Application of current transformer trouble detection
90	8.12 Reliable, selective tripping at the differential zone boundary
94	8.13 CT column ground fault protection
95	8.14 In-service transfer of network elements and breaker substitution
100	8.15 In-zone grounds
102	8.16 Stub bus considerations
104	8.17 Breaker failure considerations
106	8.18 Backup protection
109	Annex A (informative) High-impedance bus differential application example
110	A.1 Short-circuit levels A.2 Stability on external faults (security check)
111	A.3 Verification of CT voltage ratings (dependability check) A.4 Sensitivity on internal faults
112	A.5 Dielectric and thermal ratings
113	Annex B (informative) Double-bus single-breaker application example B.1 Introduction
114	B.2 Basic bus protection logic
115	B.3 Accounting for transfers of network elements
118	B.4 Accounting for breaker substitution
120	B.5 Breaker failure protection
122	B.6 Summary
123	Annex C (informative) Setting example for differentially connected overcurrent bus protection C.1 System conditions C.2 CT selection C.3 CT burden C.4 Relay characteristic C.5 Relay pickup setting
124	C.6 Partial differential applications
125	Annex D (informative) Bibliography