IEEE C37.23 2004

$52.54

IEEE Standard for Metal-Enclosed Bus

Published By	Publication Date	Number of Pages
IEEE	2004	57

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Description

Revision Standard – Active. IEEE Std C37.23-2003 is a revision of IEEE Std C37.23-1987 (Reaff 1991). Project scope: This standard covers assemblies of metal-enclosed conductors along with associated interconnections, enclosures, and supporting structures. When switches and disconnecting links are included, they shall conform to this standard. This standard is concerned with performance characteristics of enclosed, rather than open, indoor and outdoor conductor assemblies with rated maximum operating voltages through 38 kV. While this standard does cover 600 volt assemblies, it does not pertain to ANSI/UL 857 type busways and associated fittings, nor does it pertain to metal enclosed bus assemblies utilizing cables as the primary conductors. Project purpose: The Standard for Metal-Enclosed Bus was last updated in 1987. The standard needs to be updated to harmonize with certain other standards within the C37.2XXX series of documents.

PDF Catalog

PDF Pages	PDF Title
1	Cover
2	IEEE Standard for Metal-Enclosed Bus
5	Introduction
6	Notice to Users Errata Interpretations Participants
8	Contents
10	1. Scope 2. References
11	3. Definitions
13	4. Service conditions 5. Ratings 5.1 General
14	5.2 Voltage and insulation levels 5.2.1 Rated maximum voltage 5.2.2 Rated insulation levels 5.2.3 Voltages and insulation levels Table 1— Isolated-phase bus — preferred voltage ratings and insulation level
15	Table 2— Nonsegregated-phase bus — preferred voltage ratings and insulation level Table 3— Segregated-phase bus — preferred voltage ratings and insulation level
16	Table 4— DC bus duct — preferred voltage ratings and insulation level 5.3 Rated power frequency 5.4 Rated current 5.4.1 Rated continuous current
17	Table 5— Temperature limits for ME bus Table 6— Temperature limits for insulating materials
18	Table 7— Isolated-phase bus — preferred continuous self-cooled current ratings (rms amperes) Table 8— Segregated-phase and nonsegregated-phase bus — preferred continuous self-cooled current…
19	5.4.2 Rated momentary withstand current Table 9— Isolated-phase busy — rated withstand current 5.4.3 Rated short-time withstand current 6. Tests 6.1 General
20	Table 10— Segregated and nonsegregated-phase bus — preferred rated withstand current
21	Table 11— DC bus duct — preferred rated withstand current 6.2 Design tests 6.2.1 Dielectric tests
22	6.2.2 Continuous-current tests
24	6.2.3 Momentary withstand current test
25	6.2.4 Short-time withstand current tests 6.2.5 Weather-resistance tests
26	6.2.6 Flame-resistance tests for applied insulation 6.2.7 Flame-resistance tests 6.2.8 Paint qualification test 6.3 Production tests 6.3.1 Power frequency withstand voltage tests 6.3.2 Mechanical operation tests 6.3.3 Grounding of instrument transformer case tests 6.3.4 Electrical operation and control wiring tests
27	6.4 Field tests 6.4.1 Weather-resistance 6.4.2 Dielectric tests 6.4.3 Forced-air cooled bus 7. Construction 7.1 Materials and finish 7.1.1 Materials
28	7.1.2 Finishes and color 7.2 Grounding 7.3 Adjacent and supporting structure 7.4 Ventilation 7.5 Force-cooled 7.5.1 Forced-air-cooled, isolated-phase bus
30	7.6 Vapor barriers 7.7 Fire barriers 7.8 Insulating materials for covering buses and connections 7.9 Terminations and flexible connections 7.10 Switches or links for station-service transformers 7.11 Secondary wiring 7.11.1 Control and secondary wiring
31	7.11.2 Secondary-wiring terminals 7.11.3 Terminal blocks 7.11.4 Nameplate marking 8. Miscellaneous accessories
32	9. Application guide for ME bus in unusual service conditions 9.1 Ambient air temperature above 40 °C 9.2 Ambient air temperature below –30 °C 9.3 Application at unusual altitudes 9.4 Other conditions that may affect design and application
33	Table 12— Altitude correction factors (ACF) 9.5 Modification of equipment for unusual environment
34	9.5.1 Exposure to damaging fumes, vapors, steam, salt air, and oil vapors 9.5.2 Exposure to excessive dust, abrasive dust, magnetic or metallic dust 9.5.3 Exposure to hot and humid climates
35	9.5.4 Exposure to explosive mixtures of dust or gases 9.5.5 Exposure to abnormal vibration, shocks, or tilting 9.5.6 Exposure to seismic shock
36	Annex A—(informative) Guide for calculating losses in isolated-phase bus
56	Annex B—(informative) Bibliography