易爆环境.第6部分:液浸"o"类型的设备防护

[中文适用范围]： 本部分 IEC 60079 规定了用于爆炸性气体环境的防爆设备和组件的设计、构造、测试和标记要求，采用液体浸入型保护 "o"。 防爆设备和组件的液体浸入型保护 "o" 分为： - 保护等级 "ob" (EPL "Mb" 或 "Gb") - 保护等级 "oc" (EPL "Gc") 对于保护等级 "ob"，本标准适用于额定电压不超过 11 kV 有效值交流或直流的情况。 对于保护等级 "oc"，本标准适用于额定电压不超过 15 kV 有效值交流或直流的情况。 注：更高电压的要求正在考虑中。 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。 [外文原描述]： IEC 60079-6:2015 specifies the requirements for the design, construction, testing and marking of Ex Equipment and Ex Components with type of protection liquid immersion "o" intended for use in explosive gas atmospheres. Ex Equipment and Ex Components of type of protection liquid immersion "o" are either: - Level of Protection "ob" (EPL "Mb" or "Gb") or - Level of Protection "oc" (EPL "Gc"). For Level of Protection "ob", this standard applies where the rated voltage does not exceed 11 kV r.m.s. a.c. or d.c. For Level of Protection "oc", this standard applies where the rated voltage does not exceed 15 kV r.m.s. a.c. or d.c. 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 requirement of this standard takes precedence. This fourth edition cancels and replaces the third edition, published in 2007. This edition constitutes a technical revision. The significant changes with respect to the previous edition are: - Edition 4 represents a major technical revision of the requirements for oil immersion "o" and should be considered as introducing all new requirements. The normal "Table of Significant Changes" has not been included for this reason. In particular: - The requirements for oil immersion "o" have been redefined into liquid immersion, levels of protection "ob" and "oc" as recommended by the responses to 31/715/DC; - The ability to protect sparking contacts has been added to both "ob" and "oc". Additional requirements have been introduced for the protective liquid. Keywords: Ex Equipment and Ex Components with type of protection liquid immersion "o"