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.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 1<\/td>\n | Cover <\/td>\n<\/tr>\n | ||||||
| 2<\/td>\n | IEEE Standard for Metal-Enclosed Bus <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | Notice to Users Errata Interpretations Participants <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | Contents <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1. Scope 2. References <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 3. Definitions <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4. Service conditions 5. Ratings 5.1 General <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 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\u2014 Isolated-phase bus \u2014 preferred voltage ratings and insulation level <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Table 2\u2014 Nonsegregated-phase bus \u2014 preferred voltage ratings and insulation level Table 3\u2014 Segregated-phase bus \u2014 preferred voltage ratings and insulation level <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Table 4\u2014 DC bus duct \u2014 preferred voltage ratings and insulation level 5.3 Rated power frequency 5.4 Rated current 5.4.1 Rated continuous current <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Table 5\u2014 Temperature limits for ME bus Table 6\u2014 Temperature limits for insulating materials <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Table 7\u2014 Isolated-phase bus \u2014 preferred continuous self-cooled current ratings (rms amperes) Table 8\u2014 Segregated-phase and nonsegregated-phase bus \u2014 preferred continuous self-cooled current… <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5.4.2 Rated momentary withstand current Table 9\u2014 Isolated-phase busy \u2014 rated withstand current 5.4.3 Rated short-time withstand current 6. Tests 6.1 General <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Table 10\u2014 Segregated and nonsegregated-phase bus \u2014 preferred rated withstand current <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Table 11\u2014 DC bus duct \u2014 preferred rated withstand current 6.2 Design tests 6.2.1 Dielectric tests <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 6.2.2 Continuous-current tests <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 6.2.3 Momentary withstand current test <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 6.2.4 Short-time withstand current tests 6.2.5 Weather-resistance tests <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 7.11.2 Secondary-wiring terminals 7.11.3 Terminal blocks 7.11.4 Nameplate marking 8. Miscellaneous accessories <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 9. Application guide for ME bus in unusual service conditions 9.1 Ambient air temperature above 40 \u00b0C 9.2 Ambient air temperature below \u201330 \u00b0C 9.3 Application at unusual altitudes 9.4 Other conditions that may affect design and application <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Table 12\u2014 Altitude correction factors (ACF) 9.5 Modification of equipment for unusual environment <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Annex A\u2014(informative) Guide for calculating losses in isolated-phase bus <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | Annex B\u2014(informative) Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" IEEE Standard for Metal-Enclosed Bus<\/b><\/p>\n |