新资讯｜2021年11月起，UL将会开始实行 UL8750的更新条文。

根据UL 10月资讯，2021年11月起，UL将会开始实行 UL8750 的更新条文。

以下为更新的详细内容：

01

SUPPLEMENT SE – REQUIREMENTS FOR CLASS P LED DRIVERS

SE5.3 A driver with field-wiring leads, field-wiring terminals,or push-in terminals shall be marked 

“Use only within an enclosure” or equivalent. 

The marking may be provided in an installation guide orequivalent accompanying document.

带有现场接线、现场接端子, 推入式端子的 CLASS P LED 驱动需要标上“Use only within anenclosure”或相等标签。标签可以印产品或安装说明书中。

02

6.7 Polymeric potting compound

6.7.3 Polymeric potting compound that can touch any part of theinsulation system of a transformer shall be tested in accordancewith Supplement SA

– Substitutions or Modification to an Electrical InsulationSystem in the Standard for Systems of Insulating Materials –General, UL 1446.

灌封胶如果接触到变压器绝缘系统任何部分, 就需要根据 Supplement SA – Substitutions orModification to an Electrical Insulation System in the Standard forSystems of Insulating Materials – General, UL 1446 进行测试。

Exception No. 1: This test does not apply if the transformer isnot used for the mitigation of the risk of electric shock or is notused to separate Class 2 circuits or LVLE circuits from hazardouscircuits.

Exception No. 2: This test does not apply if the transformerinsulation system already includes the potting.

Exception No. 3: This test does not apply if the insulationsystem is used up to the temperature permitted for class 105 (A)according to Table 8.1 of this standard.

Exception No. 4: This test does not apply for thermosettingpotting compounds where the insulation system of a transformerutilizes a thermoset varnish which completely encloses the coilwindings- preventing the potting compound from making contact withthe winding wire insulation.

例外 1：如果变压器不用于减轻电击风险或不用于将 Class 2 电路或 LVLE 电路与危险电路分开，则该测试不适用。

例外 2：如果变压器绝缘系统已经包括灌封胶，则该测试不适用。

例外 3：如果绝缘系统的使用温度达到本标准表 8.1 规定的 105 (A) 级所允许的温度，则该测试不适用。

例外 4：如果变压器的绝缘系统使用热固性清漆, 并完全包围绕组线防止热固性灌封胶与绕组线绝缘接触，则该测试不适用。

03

7.2A.2 Grounding

A.2.7 When the path between the grounding connection means andthe ground termination point in the product includes PWB traces,the construction is to be evaluated per the bonding conductor testsin 8.23.

当接地连接装置和接地端接点之间的路径包括 PWB 走线时，需要评估 8.23 bonding conductortests。

04

SUPPLEMENT SF – LED EQUIPMENT WITH WIRED CONTROL CIRCUITS

LED 设备中用于控制功率，光输出特性，操作或性能数据传输等的控制电路需要附合 SF 的要求。

Marking requirement

1. Identification of the terminals or lead wires for controlcircuits, Identification of the intended industry or proprietaryprotocols

2.Device wired control circuit marked ‘Class 2’

3. "CAUTION: More than one power supply present” orequivalent

4.“Notice: This control circuit is not isolated - seeinstallation instructions” or equivalent

5. Installation instructions

Marking 要求

1.控制线路端子或电线识别，行业或专有协定识别；

2."Class 2|如控制线路已评估 Class 2 或外接 Class 2 电源；

3.“CAUTION: More than one power supply present” 如控制线路是外接非 Class2 电源；

4“Notice:This control circuit is not isolated - see installationinstructions” 如控制电路是非隔离并满足豁 SF3.1 免条款；

5.安装说明。

希望以上信息能有助于广大客户更了解标准的要求。

如果希望了解更多有关 UL8750 的更新条文，或是需要其它咨询相关资讯，欢迎随时联系我司咨询了解。