IEEE C57.12.44-2005

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IEEE Standard Requirements for Secondary Network Protectors

Published By	Publication Date	Number of Pages
IEEE	2005

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Description

Revision Standard – Superseded. Revision of IEEE Std C57.12.44-2000. The performance, electrical and mechanical interchangeability, and 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. This equipment is used for automatically connecting and disconnecting a network transformer from a secondary spot or grid network.

PDF Catalog

PDF Pages	PDF Title
3	IEEE Standard Requirements for Secondary Network Protectors
6	Introduction Notice to users Errata Interpretations Patents
7	Participants
9	Contents
11	IEEE Standard Requirements for Secondary Network Protectors 1. Overview 1.1 Scope 1.2 Purpose 1.3 Word usage 2. Normative references
12	3. Definitions
13	4. Service conditions 4.1 Usual service conditions 4.1.1 General 4.1.2 Temperature 4.1.3 Altitude
14	4.1.4 Generation 4.2 Unusual service conditions 4.2.1 General 4.2.2 Unusual temperature and altitude conditions 4.2.3 Insulation at high altitude 5. Design tests 5.1 Continuous current thermal test
15	5.1.1 Test conditions 5.1.2 Test duration
16	5.1.3 Ambient temperature 5.1.4 Performance
17	5.2 Electrical tests 5.2.1 Interrupting rating test 5.2.2 Test conditions 5.2.3 Short-time current test
18	5.2.4 Fault close test 5.2.5 Fuse interruption test for non-silver-sand fuses
19	5.2.6 Fuse interruption test for silver-sand fuses
20	5.3 Mechanical endurance test 5.3.1 Test conditions 5.3.2 Operating duty 5.3.3 Rate of operation 5.3.4 Performance
21	6. Production tests 6.1 Operational tests 6.1.1 Electrical operations
22	6.1.2 Performance 6.2 Dielectric tests
23	6.2.1 Tests conditions 6.2.2 Performance 6.3 Insulation resistance tests 6.3.1 Test conditions
24	6.3.2 Performance 6.4 Current path resistance tests 6.4.1 Test conditions 6.4.2 Performance 6.5 Mechanical tests 6.5.1 Mechanical fit test conditions and performance 6.5.2 Submersible seal integrity test conditions and performance
25	7. Relay characteristics 7.1 General 7.2 Automatic close functions 7.2.1 Dead network close function 7.2.2 Normal close function 7.2.3 Closing adjustment
26	7.3 Automatic trip functions 7.3.1 Sensitive trip function 7.3.2 Time delay trip function 7.3.3 Insensitive trip function
27	7.3.4 Watt-var trip 7.4 Tripping adjustment
28	8. Fuses and fuse mountings 8.1 Fuse provisions 8.2 Functional performance specifications
29	8.3 Fuse types 9. Rating requirements 9.1 Nameplates
30	9.2 Interrupting rating
31	9.3 AC voltage ratings
32	9.4 Dielectric test voltage 9.5 Control voltage 9.6 Closing voltage
33	9.7 Tripping currents 10. Mechanical performance specifications 10.1 Submersible type 10.2 Nonsubmersible type
34	10.3 Open-frame type 10.4 Mounting application 10.5 General requirements 10.5.1 Network protector barriers 10.5.2 Studs, bolts, and screws 10.5.3 Inspection windows 10.5.4 Operating handle
35	10.5.5 Lifting facilities 10.5.6 Rollout rails
36	10.5.7 Special tools 10.5.8 Ground pad 10.5.9 Materials 10.5.10 Nameplates 10.5.11 Cover plate 10.5.12 Internal main bus 10.5.13 Secondary disconnect 10.5.14 Spare auxiliary contacts
37	10.5.15 Remote monitoring provisions 10.5.16 Operation counter 10.5.17 Contact position indicator 10.5.18 Spring position indicator (stored-energy breakers only) 10.5.19 Insulating material 10.5.20 Grounding 10.6 Finish 11. Other requirements 11.1 Submersible enclosure
38	11.2 Nonsubmersible enclosure 11.2.1 Ventilated enclosure 11.2.2 Semi dust-tight enclosure 11.2.3 Drip-tight enclosure 11.2.4 Drip-tight/semi dust-tight enclosure 11.3 Open frame enclosure 11.4 Mounting configurations 11.4.1 Transformer mounted enclosure
39	11.4.2 Separately mounted enclosure 11.5 Network-side terminations 11.5.1 Stud-type terminals
40	11.5.2 Spade-type terminals
41	Annex A (normative) Classification of insulating materials A.1 General A.2 Insulating materials
42	A.3 Insulation systems
43	A.4 Insulation service stresses
45	Annex B (informative) Network fuse application B.1 General B.2 Protector fuse
46	B.3 Types of fuses
54	B.4 History
55	Annex C (informative) Pumping C.1 General C.2 Causes C.3 Effects of pumping
56	Annex D (informative) The unprotected zone in network protectors
57	Annex E (informative) Contact surface oxidation
58	Annex F (informative) Reverse current sensitivity F.1 General F.2 Reverse power levels
59	F.3 Relay settings
61	Annex G (informative) Network protector enclosures
62	Annex H (informative) Bibliography