IEEE C57.131-2012

$115.92

IEEE Standard Requirements for Tap Changers (Superseded Redline)

Published By	Publication Date	Number of Pages
IEEE	2012

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Description

Revision Standard – Inactive-Reserved. This standard covers electrical and mechanical performance and test requirements for tap changers installed in voltage regulating power and distribution transformers of all voltage and kVA ratings. It covers load tap changers (LTCs), also known as on-load tap changers (OLTCs), which can change taps while the transformer is energized and carrying load; and it covers de-energized tap changers (DETCs), also known as off-circuit tap changers, which may be operated only while the transformer is not energized. For load tap changers, this standard covers both resistor and reactor types. It also covers certain aspects of the attendant tap changer motor-drive mechanism. It does not cover the tap changer control system (manual or automatic).

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std IEEE Std C57.131-2012 Front cover
3	Title page
6	Notice to users Laws and regulations Copyrights Updating of IEEE documents Errata Patents
8	Participants
10	Introduction
11	Contents
13	Important notice 1. Overview 1.1 Scope 1.2 Application
14	2. Normative references 3. Definitions
17	4. Service conditions 4.1 Temperature of tap changer environment
18	4.2 Temperature of tap changer motor-drive mechanism environment 4.3 Overload conditions
19	5. Requirements for LTCs 5.1 Rating
20	5.2 Design tests for LTCs
32	5.3 Routine tests for LTCs
33	5.4 LTC test report 6. Requirements for motor-drive mechanisms for load tap changers 6.1 Permissible variation of auxiliary supply
34	6.2 Design tests for motor-drive mechanism 6.3 Routine tests for motor-drive mechanism
35	6.4 Test report for motor-drive mechanism 7. Requirements for de-energized tap changers (DETCs) 7.1 General requirements
36	7.2 Design tests for DETCs
40	7.3 Routine tests 8. Requirements for motor-drive mechanisms for DETCs 8.1 General requirements 8.2 Permissible variation of auxiliary supply
41	8.3 Design tests for motor-drive mechanism 8.4 Routine tests for motor-drive mechanism
42	8.5 Test report for motor-drive mechanism 9. Nameplate 9.1 Load (on-load) and de-energized (off-circuit) tap changers
43	9.2 Motor-drive mechanisms 10. Manufacturer’s operating instructions
44	Annex A (informative) Switching duty relating to load tap changers (LTCs) with resistor transition
50	Annex B (informative) Switching duty relating to load tap changers (LTCs) with reactor transition
61	Annex C (informative) Method of determining the equivalent temperature of the transition resistorusing power pulse currents
62	Annex D (informative) Simulated circuits for service duty and breaking capacity tests for resistance-type LTCs
66	Annex E (informative) Tutorial information on LTC application
73	Annex F (informative) Bibliography