3.1 ambient temperature: The temperature surrounding the object under consideration. Where an electrical heating device is enclosed in thermal insulation, the ambient temperature is the temperature exterior to the thermal insulation. 环境温度：被考核对象的周围环境温度。当伴热器被保温材料包裹时，环境温度指保温材料外部的温度。 2The numbers in brackets correspond to those of the bibliography in Annex A. 3ASTM publications are available from the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, www.nfpa.org/). Copies are also available from the Institute of Electrical and Electronics Engineers, 445 Hoes Lane, P.O. Box 1331, Piscataway, NJ 08855-1331, USA (http://standards.ieee.org/). 3.2 braid or sheath: Metallic braid, metallic sheath, or other equivalent electrically conductive material intended to provide an electrical path to operate an electrical protection device. 编织层或护套：金属编织层、金属护套，或其他类似的导电材料，可以提供电路来操作电保护设备。 3.3 certifying agency: Organization that validates that equipment meets tests and standards. 认证机构：可证明设备符合检测和标准的机构。 3.4 cold lead: An electrically insulated conductor used to connect a heating conductor to the branch-circuit conductors and designed so as not to produce appreciable heat. 冷端引线：用于将加热导体和分支回路导体连接的电绝缘导线，该导线不产生明显的热量。 3.5 connections: Terminations and splices used to attach a heating device to power wiring or to connect sections of devices. 连接件（接头）：将加热装置附加到电源线或将设备的部件连接起来的端子和联接物。 3.6 dead leg: A segment of process piping that is not in the normal flow pattern. 盲管：同正常流动的管线隔开的一段工艺管段。。 3.7 Division 1: Terminology used for classification of an industrial area in which flammable gases or vapors, flammable liquids, combustible dusts, or ignitable fibers or flyings can be present under normal conditions, or from frequent breakdowns, or where failure of equipment could release materials and create simultaneous failure of electrical equipment. 类别1：用于某个工业区域的分级的术语，在这个区域中，在正常条件下，或频繁故障，或设备故障能释放材料并同时产生电气设备故障的情况下，能够产生易燃气体或蒸汽，易燃液体，可燃灰尘，或可燃纤维或飞花。 NOTE—See the NEC for a detailed definition.5 备注—见NEC中的详细定义。 3.8 Division 2: Terminology used for classification of an industrial area in which flammable gases or vapors, flammable liquids, combustible dusts, or ignitable fibers or flyings will only be present under abnormal conditions. 类别2：用于某个工业区域的分级的术语，在这个区域中，只有在非正常情况下，易燃气体或蒸汽，易燃液体，可燃灰尘，或可燃纤维或飞花。 NOTE—See the NEC for a detailed definition. 备注—见NEC中的详细定义。 3.9 electrical insulation: A dielectric material that insulates each conductor from other conductors or from conductive parts at or near earth potential. 电绝缘：一种电介体，可以在地电势附近将每个导体与其它导体或导电部件隔离开。 3.10 electrical resistance heat tracing: The utilization of electric heating cables, other electric heating devices, and support components that are externally applied and used to maintain or raise the temperature of fluids/materials in piping and associated equipment. 电阻式伴热：在管道和联合设备中，在表面用于维持或提升液体/材料温度的电加热带、其它电加热装置以及支持部件的使用。 3.11 end termination connection: The termination applied to the end of a heating cable that may be heat producing, opposite to where the power is supplied. 尾端连接：位于伴热器供电端的对应端的终端，可能产生热量。 3.12 factory fabricated: A heating device assembled by the manufacturer, including end terminations and connections. 工厂装配：由生产商装配的加热装置，包括尾端和接头。 3.13 field assembled: A heating device supplied in bulk form with terminating components assembled on site. 现场装配：加热装置带有终端部件批量供货，现场装配。 3.14 heating device: Heating cable or surface heating unit. 加热装置：加热电缆或表面加热元件。 3.15 heat loss: A quantitative value of energy flow from a pipe, vessel, or equipment to the surrounding ambient. 热损失：从管道、容器，或设备散逸到周围环境中的能量的数值。 3.16 heat sink: A part that conducts and dissipates heat away from the pipe or equipment. Heat sinks, as related to pipe heating systems, can be pipe supports, valve operators, etc. 散热件：将热量从管道或设备上传递并消散热量的部件。散热设备，就管道加热系统来说，可以是管线支撑、阀门执行机构等。 3.17 heat-tracing circuit: A heat-tracing circuit is comprised of one or more heating devices or segments connected to branch wiring of a single-circuit protection device. 伴热电路：一个伴热电路由一个或多个与一个单电路保护设备的分线相连的加热装置或部件组成。 5Information on references can be found in Clause 2. 3.18 heat-transfer aids: Thermally conductive materials, such as metallic foils or heat-transfer cements, used to increase the heat-transfer rates from the heating devices to the process piping or equipment. 促进传热的材料：导热材料，例如金属箔带或导热接泥等可增加从加热装置向工艺管道或设备的传导效率的材料。
3.19 high-limit temperature: The maximum allowable temperature, including the piping, the fluid, and the heating system. 上限温度：包括管道、流体、和伴热系统在内的{zg}容许温度，。 3.20 integral components: Factory fabricated or field installed electrical terminations and connections, such as heat shrink terminations, cold-lead connections, molded-end seals, or splices, which conform to the general shape of the heating device and are exposed to the same environments as the heating device. 整体部件：工厂装配或现场安装的端子和接头，比如热缩端子、冷端接头、模端密封，或接头，这些与加热装置的外形一致，并暴露于和加热器相同的环境中。
3.21 maintain temperature: Specified temperature of the fluid or process material that the heat tracing is designed to hold at equilibrium under specified design conditions. 维持温度：伴热被设计须在规定的设计条件下的维持的液体或过程材料的规定温度 3.22 maximum continuous exposure temperature: The highest temperature to which a component of the heat-tracing system may be continuously exposed (heater de-energized). {zd0}持续暴露温度：伴热系统的某一部件可能会持续暴露的{zg}温度（断距加热器）。 3.23 maximum intermittent temperature (energized or de-energized): The highest allowable temperature to which a heating device or components may be exposed for a period of time as declared by the manufacturer. {zd0}间断温度（给予能量的或断距的）：如生产商所声明的，加热装置或部件可能在一段时间内暴露的{zg}允许温度。 3.24 maximum maintain temperature: Specified maximum temperature of a surface or process that the heating device is capable of maintaining continuously. {zd0}维持温度：加热装置能够持续维持的表面或过程的规定{zd0}温度。 3.25 operating voltage: The actual voltage applied to the heating device when in service. 工作电压：在使用中用于加热装置的实际电压。 3.26 overjacket: The outermost continuous layer of insulating material applied to protect against corrosion and enhance mechanical protection. 外护套：用于防护腐蚀和提高机械保护的绝缘材料的最外连续层。 3.27 oversize insulation: A term applied to thermal insulation when the inside diameter of the thermal insulation must be larger than the nominal outside diameter of a particular pipe so as to accommodate the heating cable. 过大绝缘：用于保温的术语，其中某一特殊管道的保温层内径必须大于其名义上的外径来适应加热带。 3.28 parallel heating cable: Heating elements that are electrically connected in parallel, either continuously or in zones, so that the watt density per lineal length is maintained, irrespective of any change in length for the continuous type or for any number of discrete zones. 并联加热电缆：持续或区域性通过电并联的加热元件，以便维持每个线性长度的功率密度，与持续类型或不连续的区域的数量的长度变化都没有关系。 3.29 power connection: The connection between the heating device and incoming power. 电源连接：加热装置与输入电源的连接。 3.30 rated output: Power/unit length of heating device or total power, at rated voltage, and temperature (if required), normally expressed as W/m (W/ft) or kW. 额定输出：在额定电压和温度（如有要求）下，加热装置或总功率的电源/单位长度，一般表示为W/m (W/ft) or kW。 3.31 rated voltage: The voltage to which operating and performance characteristics of a heating device is referred. 额定电压：加热装置参考的运行和性能特性电压。 3.32 routine test: A test performed by the manufacturer of the heating device on all devices during or after the production process. 出厂试验：在制造过程中或制成后，加热装置的生产商对所有设备施行的试验。 3.33 runaway pipe temperature: The highest equilibrium pipe temperature that occurs when the heating device is continuously energized at the maximum ambient temperature. 剧增管道温度：当加热装置在{zd0}环境温度中持续给电时产生的{zg}管道平衡温度。 3.34 series heating cable: Heating elements that are electrically connected in series with a single current path and have a specific resistance at a given temperature for a given length. 串联加热带：加热元件，通过一条电路串联起来，在特定长度时给特定温度，会有特殊的电阻。 3.35 sheath: A uniform and continuous covering, metallic or nonmetallic, enclosing the insulated conductor(s), used to protect the cable against mechanical damage and influences from the surroundings (corrosion, moisture, etc.). See: overjacket. |
