家用及类似用途电器安全 第2-26部分：钟表特殊要求

[中文适用范围]： 本部分IEC 60335涉及额定电压不超过250V的电动时钟的安全，包括直流供电设备和电池供电设备。本标准范围内的设备示例包括：闹钟、带有电动上弦机构的弹簧驱动时钟、以及带有非电机驱动装置的时钟。本标准尽可能解决家用电器对家庭内外所有人造成的常见危险。然而，本标准通常不考虑以下情况：因身体、感官或智力能力不足或缺乏经验和知识而无法安全使用设备的人员；儿童玩耍设备的情况。本标准不适用于：专为工业用途设计的设备；在特殊条件下使用的设备，如存在腐蚀性或爆炸性环境的场所；具有其他功能的时钟，无论是否与时间指示结合，如主控时钟和烹饪炉、洗衣机等类似设备的定时器；打卡用途的时钟；仅包含电子电路的时钟（IEC 60065，IEC 62368-1）；手表。 [外文原描述]： IEC 60335-2-26:2024 deals with the safety of electric clocks having a rated voltage not more than 250 V including direct current (DC) supplied appliances and battery-operated appliances. Examples of appliances that are within the scope of this standard are – alarm clocks; – spring-driven clocks with an electrically operated winding mechanism; – clocks incorporating driving means other than motors. As far as is practicable, this standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home. 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 authorities, the national authorities responsible for the protection of labour and similar authorities. This standard does not apply to – appliances intended exclusively for industrial purposes; – appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas); – clocks having other functions, whether or not in combination with time indication, such as master control clocks and timers for cooking ranges, washing machines and similar appliances; – clocks for "clocking-in" purposes; – clocks incorporating electronic circuits only (IEC 60065, IEC 62368-1); – watches. This fifth edition cancels and replaces the fourth edition published in 2002 and Amendment 1: 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) alignment with IEC 60335-1:2020; b) conversion of some notes to normative text (Clause 1); c) application of test probe 19 (8.1.1, 20.2, B.22.3, B.22.4); d) introduction of limits on the temperature rise of external accessible surfaces (Clause 11). 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.