根據(jù)UL 10月資訊，2021年11月起，UL將會開始實行 UL8750 的更新條文。
以下為更新的詳細內(nèi)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 or equivalent accompanying document.
帶有現(xiàn)場接線、現(xiàn)場接端子, 推入式端子的 CLASS P LED 驅動需要標上“Use only within an enclosure”或相等標簽。標簽可以印產(chǎn)品或安裝說明書中。
02
6.7 Polymeric potting compound
6.7.3 Polymeric potting compound that can touch any part of the insulation system of a transformer shall be tested in accordance with Supplement SA
– Substitutions or Modification to an Electrical Insulation System in the Standard for Systems of Insulating Materials – General, UL 1446.
灌封膠如果接觸到變壓器絕緣系統(tǒng)任何部分, 就需要根據(jù) Supplement SA – Substitutions or Modification to an Electrical Insulation System in the Standard for Systems of Insulating Materials – General, UL 1446 進行測試。
Exception No. 1: This test does not apply if the transformer is not used for the mitigation of the risk of electric shock or is not used to separate Class 2 circuits or LVLE circuits from hazardous circuits.
Exception No. 2: This test does not apply if the transformer insulation system already includes the potting.
Exception No. 3: This test does not apply if the insulation system 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 thermosetting potting compounds where the insulation system of a transformer utilizes a thermoset varnish which completely encloses the coil windings- preventing the potting compound from making contact with the winding wire insulation.
例外 1：如果變壓器不用于減輕電擊風險或不用于將 Class 2 電路或 LVLE 電路與危險電路分開，則該測試不適用。
例外 2：如果變壓器絕緣系統(tǒng)已經(jīng)包括灌封膠，則該測試不適用。
例外 3：如果絕緣系統(tǒng)的使用溫度達到本標準表 8.1 規(guī)定的 105 (A) 級所允許的溫度，則該測試不適用。
例外 4：如果變壓器的絕緣系統(tǒng)使用熱固性清漆, 并完全包圍繞組線防止熱固性灌封膠與繞組線絕緣接觸，則該測試不適用。
03
7.2A.2 Grounding
A.2.7 When the path between the grounding connection means and the ground termination point in the product includes PWB traces, the construction is to be evaluated per the bonding conductor tests in 8.23.
當接地連接裝置和接地端接點之間的路徑包括 PWB 走線時，需要評估 8.23 bonding conductor tests。
04
SUPPLEMENT SF – LED EQUIPMENT WITH WIRED CONTROL CIRCUITS
LED 設備中用于控制功率，光輸出特性，操作或性能數(shù)據(jù)傳輸?shù)鹊目刂齐娐沸枰胶?SF 的要求。
Marking requirement
1. Identification of the terminals or lead wires for control circuits, Identification of the intended industry or proprietary protocols
2.Device wired control circuit marked ‘Class 2’
3. "CAUTION: More than one power supply present” or equivalent
4.“Notice: This control circuit is not isolated - see installation instructions” or equivalent
5. Installation instructions
Marking 要求
1.控制線路端子或電線識別，行業(yè)或專有協(xié)定識別；
2."Class 2|如控制線路已評估 Class 2 或外接 Class 2 電源；
3.“CAUTION: More than one power supply present” 如控制線路是外接非 Class 2 電源；
4“Notice:This control circuit is not isolated - see installation instructions” 如控制電路是非隔離并滿足豁 SF3.1 免條款；
5.安裝說明。
希望以上信息能有助于廣大客戶更了解標準的要求。
如果希望了解更多有關 UL8750 的更新條文，或是需要其它認證相關資訊，歡迎隨時聯(lián)系我司咨詢了解。