家用和类似电器 安全 第 2-51 部分：供暖和生活用水装置固定式循环泵的特殊要求

[中文适用范围]： 本部分IEC 60335涉及家用和类似用途电动固定循环泵的安全性，这些泵用于供暖系统或服务水系统，其额定电压不超过单相器具250V，其他器具480V，包括直流供电器具。 注101：泵的水力部分和电气部分可以位于同一外壳内，使水流经电机并作为冷却剂，或者它们可以分开。 不用于正常家用的器具，但仍可能对公众构成危险的器具，如供商店、轻工业和农场中非专业人员使用的器具，也在本标准范围内。 在可行的情况下，本标准处理了家用器具及其周围环境中所有人遇到的常见危险。然而，一般而言，本标准不考虑以下情况： - 由于身体、感官或智力能力不足，或缺乏经验和知识，无法在没有监督或指导的情况下安全使用器具的人（包括儿童）； - 儿童玩耍器具。 需要注意以下事实： - 对于用于车辆、船舶或飞机上的器具，可能需要附加要求； - 在许多国家，国家卫生当局、负责劳动保护的国家当局和类似当局规定了附加要求。 本标准不适用于： - 用于循环水以外液体的泵； - 非循环泵（IEC 60335-2-41）； - 专用于工业用途的循环泵； - 用于特殊条件场所（如存在腐蚀性或爆炸性环境（粉尘、蒸汽或气体））的循环泵。 [外文原描述]： IEC 60335-2-51:2023 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with a comprehensive content of the Standard. IEC 60335-2-51:2023 EXV includes the content of the references made to IEC 60335-1:2020. IEC 60335-2-51:2023 deals with the safety of electric stationary circulation pumps for house-hold and similar purposes intended for use in heating systems or in service water sys-tems, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances including direct current (DC) supplied appliances. The hydraulic and electrical parts of the pump can be in the same enclosure, so that the water flows through the motor and serves as a coolant, or they can be separated. Appliances not intended for normal household use, but that nevertheless can be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard. As far as is practicable, this standard deals with the common hazards presented by ap-pliances that are encountered by all persons in and around the home. However, in gen-eral, it does not take into account: - persons (including children) whose physical, sensory or mental capabilities; or lack of experience and knowledge prevents them from using the appliance safely without supervision or instruction; - children playing with the appliance. Attention is drawn to the fact that - for appliances intended to be used in vehicles or on-board ships or aircraft, additional requirements can be necessary; - in many countries additional requirements are specified by the national health authori-ties, the national authorities responsible for the protection of labour and similar au-thorities. This standard does not apply to - pumps for circulating liquids other than water; - pumps, other than circulation pumps (IEC 60335-2-41); - circulation pumps intended exclusively for industrial purposes; - circulation pumps intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour, or gas). This fifth edition cancels and replaces the fourth edition published in 2019. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the pre-vious edition: a) the text has been aligned with IEC 60335-1:2020; b) some notes have been converted to normative text (Clause 1); c) the use of separate connectors to ease the installation and establish the supply con-nection has been introduced (7.12.1, 22.102, 24.1.5, 24.1.101, 25.3); d) clarifications related to remote operation (22.40, 22.49, 22.51). This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its amendments unless that edition precludes it; in that case, the latest edition that does not preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.