爆炸性环境 第45部分：内燃机电气点火系统

[中文适用范围]： IEC 60079-45:2025旨在通过为火花点燃式往复式内燃机的点火系统提供最低要求，从而提升人员的安全。其中部分系统适用于设备保护等级（EPL）Gc。本文件规定了点火系统及其组件的最低构造和测试要求，并提供了制造商的安装和维护建议，适用于提供EPL Gc的火花点燃式往复式内燃机的点火系统及其组件，适用于设备组IIB+H2、IIB或IIA。这些要求适用于额定工作电压小于或等于60 kV的点火系统。本文件仅适用于在运行时静止的往复式内燃机和可能成为点火源的移动机械所使用的点火系统或单个点火系统组件。本文件适用的范围包括但不限于燃气压缩机、电力发电机、叉车和泵。本文件不适用于以下情况：a) 使用断点或磁电机类型点火系统的发动机点火系统，这些系统不适合在危险区域使用；b) 道路车辆；c) 不属于点火系统中的低压部件和电气安装，例如各种传感器、热电偶、节气门执行器、燃油控制阀、人机界面（HMI）、相应线束和布线以及除点火系统外可能属于集成控制系统的所有其他部件。本文件补充并修改了IEC 60079-0的一般要求和ISO/IEC 80079-41的要求。当本文件的要求与IEC 60079-0或ISO/IEC 80079-41的要求相冲突时，应以本文件的要求为准。 [外文原描述]： IEC 60079-45:2025 is intended to enhance the safety of personnel by providing minimum requirements for electrical ignition systems for spark-ignited reciprocating internal combustion engines, parts of which provide Equipment Protection Level (EPL) Gc. This document provides minimum construction and test requirements, in addition to manufacturer installation and maintenance recommendations, for the safe operation of ignition systems and components for spark-ignited reciprocating internal combustion engines providing EPL Gc for equipment Group IIB+H2, IIB or IIA. These requirements apply to systems rated for normal operation with secondary voltages less than or equal to 60 kV. This document applies only to the ignition systems or the individual ignition system components used on reciprocating internal combustion engines that are stationary when in operation and mobile machinery where the internal combustion engine can be potential source of ignition. Applications addressed by the scope of this document include but are not limited to gas compressors, electric power generators, forklift trucks, and pumps. This document does not apply to: a) Engine ignition systems that utilize a breaker point or magneto type ignition systems as these would not be suitable for use in a hazardous area. b) Road vehicles. c) Low voltage parts and electrical installation that are not included in the ignition system, such as various sensors and thermocouples, throttle actuator(s), fuel control valve(s), human machine interface (HMI), respective harness and wiring and all the other items that might belong to the integrated control system besides the ignition system. This document supplements and modifies the general requirements of IEC 60079-0 and the requirements of ISO/IEC 80079-41. Where a requirement of this document conflicts with IEC 60079 0 or ISO/IEC 80079-41, the requirement of this document takes precedence.