IEEE C57.12.44 1994

$56.88

IEEE Standard Requirements for Secondary Network Protectors

Published By	Publication Date	Number of Pages
IEEE	1994	51

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Category: IEEE

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Description

New IEEE Standard – Inactive – Superseded. This IEEE Standards product is part of the C57 family on Power Distribution and Regulating Transformers. The performance, electrical and mechanical interchangeability as well as the safety of the equipment are covered. The proper selection of such equipment is established as a basis for use in this standard. Certain electrical, dimensional, and mechanical characteristics are described, and certain safety features of three-phase, 60 Hz, low-voltage 600 V and below network protectors are taken into consideration. They are used for automatically connecting and disconnecting a network transformer from a secondary spot or grid network. You will receive an email from Customer Service with the URL needed to access this publication online.

PDF Catalog

PDF Pages	PDF Title
1	Title page
3	Introduction Participants
6	CONTENTS
8	1. Overview 1.1 Scope 1.2 Purpose 1.3 Word usage 2. References
9	3. Definitions
11	4. Service conditions 4.1 Usual service conditions 4.2 Unusual service conditions
12	5. Design tests 5.1 Continuous current thermal test
15	5.2 Electrical tests
18	5.3 Mechanical endurance test
19	6. Production tests 6.1 Operational tests
20	6.2 Dielectric tests
21	6.3 Insulation resistance tests
22	6.4 Current path resistance tests 6.5 Mechanical tests 7. Relay characteristics 7.1 General
23	7.2 Closing characteristics 7.3 Tripping characteristics 7.4 Closing adjustment
24	7.5 Tripping adjustment 8. Fuses and fuse mountings 8.1 Fuse provisions
25	8.2 Functional performance specifications
26	8.3 Fuse types 9. Rating requirements 9.1 Nameplates
27	9.2 Interrupting rating 9.3 AC voltage ratings 9.4 Dielectric test voltage 9.5 Control voltage 9.6 Closing voltage 9.7 Tripping currents
32	10. Mechanical performance specifications 10.1 Submersible type 10.2 Nonsubmersible type 10.3 Open frame type 10.4 Mounting application 10.5 General requirements
35	10.6 Finish 11. Other requirements 11.1 Submersible enclosure 11.2 Nonsubmersible enclosure
36	11.3 Open frame enclosure 11.4 Mounting configurations
37	11.5 Network-side terminations
38	Annex A—Classification of insulating materials A.1 General A.2 Insulating materials
39	A.3 Insulation systems
40	A.4 Insulation service stresses
41	Annex B—Network fuse application B.1 General B.2 Protector fuse B.3 Types of fuses
42	B.4 History
44	Annex C—Pumping C.1 General C.2 Causes C.3 Pumping cycle C.4 Pumping period
45	C.5 Effects of pumping
46	Annex D—The unprotected zone in network protectors
47	Annex E—Contact surface oxidation
48	Annex F—Reverse current sensitivity F.1 General F.2 Reverse power levels
49	F.3 Relay settings
51	Annex G—Network protector enclosures