IEC 60335-2-28:2021 RLV包含官方IEC国际标准及其红线版本。Redline版本仅提供英文版本，为您提供了一种快速简单的方法来比较IEC官方标准与其以前版本之间的所有变化。 IEC 60335-2-28:2021涉及家用和类似用途电动缝纫机的安全性，单相电器的额定电压不超过250 V，其他电器的额定电压不超过480 V，包括直流（DC）供电的电器和电池供电的电器。 包缝机和电气装置在本标准的范围内。 不打算用于正常家庭使用，但可能对公众造成危险的电器，如打算供商店和轻工业中的门外汉使用的缝纫机，都在本标准的范围内。在可行的情况下，本标准涉及家庭内外所有人都会遇到的电器带来的常见危险。然而，一般来说，它没有考虑到 -身体、感官或精神能力受损的人（包括儿童）；或缺乏经验和知识使他们无法在没有监督或指导的情况下安全使用器具； -儿童在玩电器。 提请注意以下事实: -对于拟用于车辆或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、负责保护劳工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 -专供工业用途的器具； -拟在有特殊条件的地方使用的器具，例如存在腐蚀性或爆炸性环境（灰尘、蒸汽或气体）。 本第五版取消并取代了2002年出版的第四版和修正案1:20 08。本版构成技术修订版。 与上一版相比，此版本包括以下重大技术变更: a)文本已与IEC 60335-1:20 20保持一致； b)一些注释已转换为规范性文本（第1、11.7、22.14、22.101条）； c)澄清电池供电设备的要求（第1、3.1.9、11.7、B.11.1条）； d)对外部可接近表面的温升引入限制(条款11)；e)已经介绍了测试探针19的应用(8.1.1、20.2)。 本第2部分应与最新版本的IEC 60335-1及其修订一起使用，除非该版本排除了本第2部分；在这种情况下，使用不排除它的最新版本。它是在该标准第六版（2020年）的基础上建立的。

IEC 60335-2-28:2021 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 60335-2-28:2021 deals with the safety of electric sewing machines for household and similar use, 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 and battery-operated appliances.
Overlock machines and electrical sets are within the scope of this standard.
Appliances not intended for normal household use, but that nevertheless can be a source of danger to the public, such as sewing machines intended to be used by laymen in shops and in light industry, are within the scope of this standard.
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. However, in general, 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 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).
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) the text has been aligned with IEC 60335-1:2020;
b) some notes have been converted to normative text (Clause 1, 11.7, 22.14, 22.101);
c) clarification of requirements for battery-operated appliances (Clause 1, 3.1.9, 11.7, B.11.1);
d) introduction of limits on the temperature rise of external accessible surfaces (Clause 11);
e) application of test probe 19 has been introduced (8.1.1, 20.2).
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.