请注意:此版本的所有临时修订版将在您购买时提供。范围1DV。1修改第1条第一款，替换为以下内容:1DV。1.1 IEC 60079标准的本部分规定了爆炸性气体环境中使用的电气设备和防爆部件的设计、施工、测试和标记要求，其防护类型为“e”。电气设备和防爆部件的防护类型“e”为:a）防护等级 “eb”（EPL“Mb”或“Gb”）；orb）防护等级“ec”（EPL“Gc”）防护等级“eb”适用于设备或防爆组件，包括其连接、导体、绕组、灯具和电池；但不包括半导体或电解电容器。注1:电子元件（如半导体或电解电容器）的使用不在“eb”防护等级范围内，因为如果不采用内部间隔距离，预期故障可能会导致温度过高或电弧和火花。 一般来说，保持这些间隔距离并保持电子元件的功能是不实际的。防护等级“ec”适用于设备或防爆组件，包括其连接、导体、绕组、灯具和电池；还包括半导体和电解电容器。注2:在“ec”保护等级下，允许使用半导体或电解电容器等电子元件，因为这些元件是在正常条件和常规预期情况下进行评估的，不太可能导致温度过高或电弧和火花。由于间隔距离的要求不适用于内部结构，如果外部间隔距离符合要求，则商用电子元件通常适用。除非另有说明，本标准的要求适用于两种保护级别。 对于防护等级“eb”，本标准适用于额定电压不超过11 kV r.m.s.，交流或直流的电气设备。对于防护等级“ec”，本标准适用于额定电压不超过15 kV r.m.s.的电气设备。，交流或直流注3:由于短路电流产生的机械应力导致连接移动，流经电网电路安全性增强连接件的短路电流不被认为会产生爆炸性气体环境着火的重大风险。正常的工业标准要求考虑短时大电流对连接安全性的影响。爆炸性气体环境的存在不会对连接的安全性产生不利影响。注4:由于事件持续时间相对较短，以及事件期间发生的对流，由于电流偏移超过正常额定电流而发生的任何短期热偏移，例如电机启动期间发生的热偏移，均不被视为产生爆炸性气体环境点火的重大风险。 注5:高压连接和相关接线（1 kV以上）易受局部放电活动增加的影响，而局部放电活动可能是一个火源。通常会增加接地表面或其他连接的间距，并为终端提供适当的高压应力消除。1DV。2修改第1条第8款，替换为以下内容:1DV。2.1本标准补充和修改了IEC 60079-0 UL 60079-0的一般要求。如果本标准的要求与IEC 60079-0 UL 60079-0的要求冲突，则以本标准的要求为准。1DV。3添加1DV。3.1如果参考了其他IEC 60079标准，这些标准中的参考要求适用于任何适用的美国国家差异。

Please note: All interim revisions for this edition available at time of your purchase will be included.Scope1DV.1 Modification of Clause 1, first paragraph to replace with the following:1DV.1.1This part of IEC 60079 standard specifies the requirements for the design, construction, testing and marking of electrical equipment and Ex Components with type of protection increased safety "e" intended for use in explosive gas atmospheres.Electrical equipment and Ex Components of type of protection increased safety "e" are either:a) Level of Protection "eb" (EPL "Mb" or "Gb"); orb) Level of Protection "ec" (EPL "Gc")Level of Protection "eb" applies to equipment or Ex Components, including their connections, conductors, windings, lamps, and batteries; but not including semiconductors or electrolytic capacitors.NOTE 1 The use of electronic components, such as semiconductors or electrolytic capacitors, is excluded from Level of Protection "eb" as expected malfunctions could result in excessive temperatures or arcs and sparks if the internal separation distances were not applied. It is not generally practical to maintain those separation distances and maintain the function of the electronic component.Level of Protection "ec" applies to equipment or Ex Components, including their connections, conductors, windings, lamps, and batteries; and also including semiconductors and electrolytic capacitors.NOTE 2 The use of electronic components, such as semiconductors or electrolytic capacitors, is permitted in Level of Protection "ec" as these are evaluated under both normal conditions and regular expected occurrences, and are not likely to result in excessive temperatures or arcs and sparks. As the requirements for separation distances are not applied to the internal construction, commercially available electronic components are generally suitable if the external separation distances comply.The requirements of this standard apply to both Levels of Protection unless otherwise stated.For Level of Protection "eb", this standard applies to electrical equipment where the rated voltage does not exceed 11 kV r.m.s., a.c. or d.c.For Level of Protection "ec", this standard applies to electrical equipment where the rated voltage does not exceed 15 kV r.m.s., a.c. or d.c.NOTE 3 Short circuit currents flowing through increased safety connections of mains circuits are not considered to create a significant risk of ignition of an explosive gas atmosphere due to movement of connections as a result of mechanical stresses created by the short circuit current. Normal industrial standards require that the effects of short time high currents on the security of connections be considered. The presence of the explosive gas atmosphere does not adversely affect the security of the connection.NOTE 4 Any short term thermal excursions that occur as a result of electrical current excursions above normal rated currents, such as those that occur during the starting of motors, are not considered to create a significant risk of ignition of an explosive gas atmosphere due to the relatively short duration of the event and the convection that occurs during the event.NOTE 5 High-voltage connections and associated wiring (above 1 kV) can be susceptible to increased partial discharge activity that could be a source of ignition. Increased spacings to earthed surfaces or other connections and provision of suitable high-voltage stress relief for the terminations are typically provided.1DV.2 Modification of Clause 1, eighth paragraph to replace with the following:1DV.2.1This standard supplements and modifies the general requirements of IEC 60079-0 UL 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0 UL 60079-0, the requirement of this standard takes precedence.1DV.3 Addition of 1DV.3.1Where references are made to other IEC 60079 standards, the referenced requirements found in these standards apply as modified by any applicable U.S. National Differences.