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的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电器 250 V，其他电器（包括直流供电电器）480 V。 注 101：泵的液压和电气部分可以位于同一外壳内，因此水流经电机并作为冷却剂，或者它们可以分开。 不用于正常家庭使用但仍可能对公众造成危险的电器，如用于商店、轻工业和农场的非专业人员使用的电器，也在本标准的范围内。 在可行的情况下，本标准处理了所有人在家中和周围遇到的电器所呈现的常见危险。然而，一般来说，它不考虑 - 由于身体、感官或智力能力或缺乏经验和知识而无法在没有监督或指导的情况下安全使用电器的人（包括儿童）； - 儿童玩耍电器。 注意以下事实： - 对于用于车辆、船舶或飞机上的电器，可能需要额外的要求； - 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额外的要求。 本标准不适用于 - 用于循环非水液体的泵； - 除循环泵外的其他泵（IEC 60335-2-41）； - 专门用于工业用途的循环泵； - 用于特殊条件（如存在腐蚀性或爆炸性环境（灰尘、蒸汽或气体））的循环泵。 [外文原描述]： IEC 60335-2-51:2023 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 60335-2-51:2023 edition 5.0 and the previous IEC 60335-2-51:2019 edition 4.0. Furthermore, comments from IEC TC 61 experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the content. 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.