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Low Voltage Transformers - Part 1: General Requirements
低压变压器第1部分:一般要求
第一版低压变压器标准——第1部分:一般要求,UL 5085-1,包含2005年4月22日和2005年10月28日发布的主题5085建议书中的要求。本标准中的要求源自CSA C22。2台66号专用变压器;UL 506,专用变压器的标准;以及UL 1585,2级和3级变压器的标准。1.范围1。1这些要求包括以下类型的变压器:a)一般用途的风冷变压器和电抗器;b) 通用自耦变压器;c) 铁磁谐振变压器;d) 2级和3级变压器(根据第3部分进行评估);
e) 软线连接变压器(根据第2部分进行评估);f) 装有过电流或过温保护装置、瞬态电压浪涌保护器或电容器的变压器;和g)永久连接的变压器。1.2这些变压器拟根据国家电气规范、ANSI/NFPA 70或CSA C22使用。1、《加拿大电气规范》第一部分。加拿大电气规范将低电压定义为31至750 V(含31至750 V)之间的任何电压,将高电压定义为750 V以上的任何电压。国家电气规范ANSI/NFPA 70将低电压定义为600 V以下的任何标称电压。
因此,拟在加拿大使用的低压变压器的额定值可能高于600 V,最高可达750 V。拟在美国使用的低压变压器的额定值最高可达600 V。如果本标准参考电压范围的条款和表格中有信息,则600 V的限值适用于美国,而750 V的限值适用于加拿大。1.3本标准不包括以下变压器:a)直接插入式变压器;b) 霓虹灯;c) 浸液;d) 可变电压;e) 低压景观;f) 游泳池和水疗中心:g)点火;h) 高强度照明;i) 玩具;j) 荧光灯类型;k) 焊工用变压器;
l) 分布;m) 拟在美国使用的标称一次额定电压超过600 V的变压器;n) 包含整流或波形成形电路的变压器;o) 无线电和电视类设备用变压器;p) 在美国使用的变压器,其过电压分接头额定电压超过660V;q) 工业控制设备中使用的自耦变压器,根据工业控制设备标准UL 508或CSA C22的要求进行评估。2号14,工业控制设备;andr)其他电气设备或器具要求中涵盖的其他特殊类型的变压器。
1.4第1部分以及第2部分和第3部分确定了每种类型变压器的特性、结构、操作条件、标记和试验条件。1.5如果变压器仅用作其他设备的部件,则本标准中的要求可根据最终产品标准中的要求进行修改。
This First Edition of the Standard for Low Voltage Transformers - Part 1: General Requirements, UL 5085-1, contains requirements from the proposals for Subject 5085 issued on April 22, 2005 and October 28, 2005. Requirements in this Standard were derived from CSA C22.2 No. 66, Specialty Transformers; UL 506, the Standard for Specialty Transformers; and UL 1585, the Standard for Class 2 and Class 3 Transformers.1 Scope1.1 These requirements cover the following types of transformers:a) Air-cooled transformers and reactors for general use;b) General purpose autotransformers;c) Ferroresonant transformers;d) Class 2 and Class 3 transformers (which are evaluated in accordance with Part 3);e) Cord-connected transformers (which are evaluated in accordance with Part 2);f) Transformers incorporating overcurrent or over-temperature protective devices, transient voltage surge protectors, or capacitors; andg) Permanently-connected transformers.1.2 These transformers are intended to be used in accordance with the National Electrical Code, ANSI/NFPA 70, or CSA C22.1, the Canadian Electrical Code, Part I. The Canadian Electrical Code defines low voltage as any voltage from 31 to 750 V inclusive and high voltage as any voltage above 750 V. The National Electrical Code, ANSI/NFPA 70, defines low voltage as any voltage up to 600 V, nominal. Therefore, low voltage transformers intended for use in Canada may be rated above 600 V up to 750 V. Low voltage transformers intended for use in the United States are rated up to 600 V. Where information in clauses and tables in this standard reference voltage ranges, the limit of 600 V applies in the United States, while the limit of 750 V applies in Canada.1.3 The standard does not cover the following transformers:a) Direct plug-in types;b) Neon;c) Liquid-immersed;d) Variable voltage (Variac);e) Low voltage landscape;f) Swimming pool and spa:g) Ignition;h) High intensity lighting;i) Toy;j) Fluorescent lamp types;k) Transformers for welders;l) Distribution;m) Transformers intended for use in the United States with a nominal primary rating of more than 600 V;n) Transformers incorporating rectifying or waveshaping circuitry;o) Transformers for use with radio- and television-type appliances;p) Transformers intended for use in the United States having overvoltage taps rated over 660 V;q) Autotransformers used in industrial control equipment, which are evaluated in accordance with the requirements of the Standard for Industrial Control Equipment, UL 508, or CSA C22.2 No. 14, Industrial Control Equipment; andr) Other special types of transformers covered in requirements for other electrical devices or appliances.1.4 Part 1, as well as Part 2 and Part 3, establish the characteristics, construction, operating conditions, markings, and test conditions for each type of transformer.1.5 The requirements in this standard may be modified by requirements in an end product standard if a transformer is intended for use only as a component in other equipment.