爆炸性环境第2部分:加压外壳“p”的设备保护

[中文适用范围]： IEC 60079的这一部分包含了用于爆炸性气体环境或爆炸性粉尘环境的具有加压外壳的电气设备的具体构造和测试要求，该设备的保护类型为"p"。它还包括对含有有限释放易燃物质的加压外壳的要求。 本标准补充并修改了IEC 60079-0的一般要求。当本标准的要求与IEC 60079-0的要求冲突时，以本标准的要求为准。 本标准不包括以下要求： - 加压外壳，其容纳系统可能释放 a) 氧含量大于正常的空气，或 b) 氧与惰性气体混合，其中氧的比例大于21%。 - 加压房间或分析仪室；参见IEC 60079-13和IEC 60079-16； - 存在"爆炸物"或烟火剂的加压外壳； - 存在气体/蒸汽和可燃粉尘的混合物的加压外壳； 注1：由于保护类型中包含了安全因素，高质量、定期校准的测量设备固有的测量不确定性被认为没有显著的有害影响，在验证设备符合本标准要求的测量时无需考虑。 - 存在自燃物质（如含有自身氧化剂的爆炸物或推进剂）的加压外壳； - 具有可燃粉尘内部释放源的加压外壳。 注2：当用户扮演制造商的角色时，通常由用户负责确保本标准的所有相关部分适用于设备的制造和测试。 注3：保护类型"p"和"p"提供设备保护等级（EPL）Mb或Gb。保护类型"p2"提供设备保护等级（EPL）Gc。更多信息请参见附录H。 [外文原描述]： IEC 60079-2:2014 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60079-2:2014 contains the specific requirements for the construction and testing of electrical equipment with pressurized enclosures, of type of protection "p", intended for use in explosive gas atmospheres or explosive dust atmospheres. It also includes the requirements for pressurized enclosures containing a limited release of a flammable substance. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirements of this standard take precedence. This standard does not include the requirements for: - pressurized enclosures where the containment system may release air with an oxygen content greater than normal, or oxygen in combination with inert gas where the oxygen is in a proportion greater than 21 %; - pressurized rooms or analyser houses; see IEC 60079-13; - pressurized enclosures used where "explosives" or pyrotechnics are present; - pressurized enclosures used where hybrid mixtures of gas/vapour and combustible dust are present; - pressurized enclosures used where pyrophoric substances such as explosives or propellants containing their own oxidizers are present; - pressurized enclosures with an internal source of release of combustible dust. This sixth edition cancels and replaces the fifth edition published in 2007. This sixth edition cancels and replaces the first edition of IEC 61241-4 published in 2001. This sixth edition constitutes a technical revision. The significance of changes between IEC 60079-2, Edition 6.0, 2014 and IEC 60079-2, Edition 5.0, 2007 are as listed in the foreword of the document. Keywords: electrical equipment with pressurized enclosures, type of protection "p", explosive gas atmospheres, explosive dust atmospheres The contents of the corrigendum of July 2015 have been included in this copy.