Ul 62368-1 Pdf Download

Safety standards for Audio/Visual and Information Technology Equipment (ITE) products moved away from a prescriptive approach to a hazard safety approach with the introduction of IEC 62368-1. This hazard-based standard offers greater flexibility in product design and makes it easier to introduce new technology.

UL Solutions, a global safety science leader, can help you understand the requirements of IEC 62368-1 as they apply to your target markets and offerings, test and certify your products for the latest 62368-1 edition.

DOWNLOAD 🔥 https://byltly.com/2y4aYi 🔥

UL Solutions is active in IEC TC108, the IEC technical committee responsible for standards for safety of electronic equipment within AV, information technology and communication technology. This provides our engineers with insights into the latest developments associated with IEC 62368-1 and a solid understanding of the principles on which these standards are built.

NewGain expertise to design to and comply with the latest requirements associated with IEC 62368-1. Our comprehensive course comprised of two separate training modules: an eLearning component and the instructor-led session. The eLearning component covers the basics of the standard. The instructor-led session digs deeper into the detailed technical content and features progressive knowledge checks and engaging interactions to help learners reinforce and apply the new concepts.

The move is more significant than a simple merger or name change, because 62368-1 adopts fundamentally different engineering principles and terminologies. In addition, some existing products that comply with 60950-1 or 60065 will need to be re-investigated to achieve certification.

Another important aspect is that, like the outgoing standards, 62368-1 applies not only to the end-user product but also to components and subsystems such as power supplies. Product manufacturers need to bear this in mind to be sure of procuring acceptable parts throughout the transition period between now and December 2020, and in the subsequent period when only 62368-1 will apply.

December 20, 2020 represents an important date for companies marketing audio-visual products or computing/communications equipment in North America (i.e. USA and Canada) and the EU. The safety standards that historically have applied to these products, IEC 60065 and IEC 60950-1 respectively, will transition to IEC 62368-1.

In North America, December 20, 2020 is the UL Effective Date. UL will proceed with a soft transition, whereby new submissions for certification will be investigated against UL/CSA 62368-1, but existing products certified to the legacy standards will not be subjected to an Industry File Review (IFR).

In Europe, the transition will be more abrupt as the outgoing standards are withdrawn in favor of the new EN 62368-1 standard, and presumptions of conformity with directives that reference the old standards will also cease.

As a single harmonized safety standard, IEC 62368-1 has been the work-in-progress of IEC Technical Committee TC108 since 2002. It is worth noting that TC108 is also responsible for IEC 60950-1 and IEC 60065, and has implemented changes in the latest editions of both to ease the transition to the new standard.

Following publication of the first edition of IEC 62368-1, in 2010, the North American Bi-National CSA/UL 62368-1 Ed. 1 was adopted in February 2012. At that time, the EU did not follow suit, but subsequently adopted the second edition as EN 62368-1 Ed. 2 in August 2014. CSA/UL 62368-1 Ed. 2 has been adopted in North America since December 2014. The Third Edition is expected to be published sometime in 2019, with the implementation date likely occurring in 2022.

Although the North American and European standards bodies have already published their national equivalents (UL/CSA 62368-1 and EN 62368-1), committees in other regions are still evaluating adoption of 62368-1, including China, Korea, and South America. Mexico has implemented NMX-I-62368-1-NYCE-2015 on a voluntary basis. Japan published JIS C 62368-1:2018 in January 2018, based on IEC 62368-1:2014 Edition 2, and will take about a year to fully adopt it into law. The Australia/New Zealand standards authorities published AS/NZS 62368.1:2018, also based on IEC 62368-1:2014 Edition 2, in February 2018.

Currently, then, the 62368-1, 60950-1 and 60065 standards are active in both North America and Europe. Although the situation may sound complicated, the standards have been allowed to coexist to help the industry transition to the new standard as smoothly and cost-effectively as possible.

As a unified replacement for 60950-1 (for ICT equipment) and 60065 (for AV equipment), 62368-1 represents more than just a merger of the two standards. The move is the latest evolution of Hazard Based Safety Engineering which has become the new approach as new types of affordable products have emerged for use in small and home offices, and for home entertainment.

In addition, 62368-1 plans to give product designers more flexibility, in product design and evaluation and to keep pace with technology without requiring frequent (expensive and time-consuming) revisions. To this end it adopts the above mentioned modern Hazard Based Safety Engineering (HBSE) principles, which replace the traditional prescriptive approach of 60950-1 and 60065, although prescriptive options are also offered.

As with both 60065 and 60950-1, the examples provided in Annex A are not exhaustive, and equipment not listed is not necessarily excluded. Edition 3 of IEC 62368-1 is expected to include additional examples of equipment that has entered widespread use since the earlier standards were published. These could include smartphones, tablet computers, wearable computers, electronic kiosks and even 3D printers.

Second Edition of 62368-1 contains clauses designed to help companies manage their transition from the legacy standards. These effectively help companies decide how and when to certify their products to 62368-1, and to manage existing inventory of subsystems and components (like power supplies) that are already certified to 60950-1 and 60065.

Readers familiar with the requirements of 60950-1 and 60065 may have spotted the potential for some problems because the legacy standards classify energy sources and circuits differently. One example is that a 60950-1 certified switched-mode power supply typically has output circuits classified as safety extra-low voltage (SELV), whereas IEC 62368-1 refers to ES1 energy sources, which considers both voltage and current. As a result, SELV is no longer defined.

Note that sub-clause 4.1.1 is expected to be removed from future editions of 62368-1. TC108 has considered recommending that the provisions should be extended into Edition 3, which is currently being reviewed for publication. However, the European committee CENELEC intends to remove the legacy component provision 4.1.1 from Edition 2 of EN 62368-1, due to come into effect December 20, 2020, and has stated that it will not be featured in Edition 3, no matter the result of the TC108 discussion. UL, on the other hand, will maintain acceptance of 60950-1 or 60065 for legacy products after the 2020 date of withdrawal as long as significant changes involving safety of critical components are not made to the specific parts in question. Hence, companies must take these regional differences into consideration when preparing their transition plan to the 62368-1 standard.

In addition to considering bodily injury, 62368-1 also applies the HBSE three-block model to analyze the potential for electrically caused fire resulting in damage to persons or property. Recognizing the need for a fuel to be present, if ignition is to occur, the three-block model is expressed in figures 3 and 4.

Moreover, 62368-1 references all energy sources applicable to ICT/AV electrical equipment. These encompass electrical energy, thermal energy such as hot accessible parts, chemical energy encompassing electrolytic reactions or poisons, kinetic energy such as moving parts, and radiated energy including optical or acoustic energy.

Figures 6 and 7, relating to electrically caused injury and electrically caused fire, enable an intuitive understanding of classification of energy sources, and the safeguards required. The actual current and voltage limits applicable to ES1, ES2 and ES3 vary. For example, the voltage limit requirements are influenced by frequency. For voltages below 1 kHz, the ES1 limit is 30 Vrms, 42.4 Vp, and 60 Vdc. The ES2 limit is 50 Vrms, 70.7 Vp, and 120 Vdc. Equipment must comply with either the voltage limit or current limit specified in the applicable energy class but does not have to comply with both. The limits also vary according to normal or abnormal operation, or a single-fault condition. The limits are detailed in clause 5 of the standard. There are also sub-clauses, such as 5.2.2.5, which detail the limits for pulse waveforms, according to off-time. TC108 plans to remove 5.2.2.5 from Edition 3 of IEC 62368-1.

62368-1 makes provision for several kinds of safeguards, and defines a hierarchy ranging from basic safeguards at the lowest level, supplementary safeguards that become operational if the basic safeguard fails, double safeguards (such as double insulation), and reinforced safeguards, which are single safeguards that offer protection equivalent to that of a double safeguard.

The hazard-based approach to safety analysis replaces the prescriptive approach adopted by each of the legacy standards. The basic intention of 62368-1 is to give designers greater flexibility to design safety measures in keeping with their products, while at the same time requiring rigorous analysis to ensure that all products are safe to use and cannot cause bodily injury or fire.

Some new test equipment is expected to be needed, to allow proper investigation of products. One key difference between the legacy standards and 62368-1 is the provision for a new type of probe for testing accessibility. A standard set of probes are used to assess the physical accessibility of energy sources within the product, and so determine whether one or more safeguards are needed. Annex 5 of 62368-1 describes the test methods used for determining accessibility and includes provisions for a new unjointed version of the standard articulated probe, for determining whether a part can be accessed by children. 2351a5e196