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Motor Control Centres (Tri-National standard, with UL 845 and NMX-J-353-ANCE)
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| 분야 | 11 : LG Electronics |
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| 적용범위 | Preface This is the common ANCE, CSA, and UL standard for motor control centres. It is the second edition of NMX-J-353-ANCE, the first edition of CSA C22.2 No. 254, and the fifth edition of UL 845. This edition of UL 845 supersedes the previous edition published on February 15th, 1995. Scope 1.1 Products covered 1.1.1 This Standard applies to motor control centres to be used in accordance with the U.S. National Electrical Code, ANSI/NFPA 70, the Canadian Electrical Code, Part I, CSA C22.1, and the Mexican Electrical Installations (Utility), NOM-001-SEDE. 1.1.2 These requirements cover motor control centres for use on circuits having available short-circuit currents not more than 200 000 A rms symmetrical or 200 000 A dc. 1.1.3 This Standard applies to single- and three-phase 50 and 60 Hz and dc motor control centres rated not more than 600 V ac or 1 000 V dc. 1.1.4 Requirements for fire pump controllers are as provided in Annex C, item 11. 1.2 Products not covered These requirements do not cover switchboards or panel boards intended for the control of electric light and power circuits, nor do they cover an individual unit for this purpose. Such units, however, that consist of manually or automatically operated switches, branch-circuit or service-circuit circuit-breakers, over current-protective devices, or the like may be used within a motor control centre. 1.3 Equipment 1.3.1 A motor control centre can contain, but is not limited to, any combination of equipment such as the following: (a) full-voltage reversing or non-reversing combination motor control units (b) full-voltage multispeed combination motor control units (c) reduced-voltage part-winding, wye-delta or auto-transformer combination motor control units (d) solid-state industrial controllers, such as adjustable-speed drives, programmable controllers, protective relays, and the like (e) lighting or distribution panel boards (f) feeder-tap units (g) incoming-line equipment, such as main lugs, fusible switch, isolation switch, or circuit-breaker (h) control or lighting transformers (i) special equipment assemblies (j) combination contactor units. 1.3.2 The foregoing equipment can contain, but is not limited to, such items as push buttons, selector switches, indicating lights, control transformers, control circuit fuses, and auxiliary devices incorporated as an integral part of the units. 1.4 Units of measurement The first values given are SI (metric) units. Alternate measurements shown in parentheses are US customary units, which sometimes are not strict conversions. |
| 국제분류(ICS)코드 | |
| 페이지수 | 230 |
| Edition |
| No. | 표준번호 | 표준명 | 발행일 | 상태 |
|---|---|---|---|---|
| 1 | CSA C22.2 NO. 254:21 | Motor control centres (Trinational standard with UL 845 and NMX-J-353-ANCE-2021) | 2021-01-01 | 표준 |
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