IEC TS 60079-39:2015（E）规定了Power-i设备和系统的构造、测试、安装和维护，这些设备和系统利用电控火花持续时间限制来维持足够的本质安全水平。本技术规范包含爆炸性环境中使用的本安设备和接线以及与进入此类环境的本安电路连接的相关设备的要求。 本技术规范不包括保护等级“ia”和软件控制电路的使用。本技术规范适用于IIB、IIA、I和III组使用不高于40 V直流电压且安全系数为1.5的电气设备。也适用于安全系数为1.0的IIC组“ic”设备。安全系数为1.5的IIC“ib”类设备仅限于高达32 V d.c.的电压。此类保护适用于电路本身不能引起周围爆炸性环境爆炸的电气设备。 本技术规范适用于使用电子控制火花持续时间限制的本质安全设备和系统，其目的是提供更多电力，同时保持足够的安全水平。本技术规范也适用于位于危险区域外或受IEC 60079系列中列出的其他保护类型保护的电气设备或电气设备部件，其中爆炸性环境中电路的本质安全取决于此类电气设备或电气设备部件的设计和构造。 通过应用本技术规范，评估危险区域内的电路是否适用于此类位置。本技术规范补充和修改了IEC 60079-0、IEC 60079-11、IEC 60079-14、IEC 60079-17和IEC 60079-25的要求。 关键词:用于爆炸性环境的Power-i设备、本质安全设备和布线

IEC TS 60079-39:2015(E) specifies the construction, testing, installation and maintenance of Power-i apparatus and systems which utilise electronically controlled spark duration limitation to maintain an adequate level of intrinsic safety. This Technical Specification contains requirements for intrinsically safe apparatus and wiring intended for use in explosive atmospheres and for associated apparatus intended for connection to intrinsically safe circuits entering such atmospheres. This Technical Specification excludes the level of protection "ia" and the use of software-controlled circuits. This Technical Specification applies to electrical equipment utilising voltages not higher than 40 V d.c. and a safety factor 1,5 for Groups IIB, IIA, I and III. It is also applicable to Group IIC "ic" apparatus with a safety factor 1,0. Group IIC "ib" apparatus with a safety factor 1,5 are restricted to voltages up to 32 V d.c. This type of protection is applicable to electrical equipment in which the electrical circuits themselves are incapable of causing an explosion of the surrounding explosive atmospheres. This Technical Specification is applicable to intrinsically safe apparatus and systems which utilise electronically controlled spark duration limitation with the aim of providing more electrical power while maintaining an adequate level of safety. This Technical Specification is also applicable to electrical equipment or parts of electrical equipment located outside hazardous areas or protected by another type of protection listed in the IEC 60079 series, where the intrinsic safety of the electrical circuits in explosive atmospheres depends on the design and construction of such electrical equipment or parts of such electrical equipment. The electrical circuits located in the hazardous area are evaluated for use in such locations by applying this Technical Specification. This Technical Specification supplements and modifies the requirements of IEC 60079-0, IEC 60079-11, IEC 60079-14, IEC 60079-17 and IEC 60079-25. Keywords: Power-i apparatus, intrinsically safe apparatus and wiring intended for use in explosive atmospheres