LED灯使用的电源申请UL8750 Class P(过热保护型)的要求

LED灯使用的电源（LED Driver）申请美规标准 UL8750 Class P（过热保护型）的要求如下：

LED 灯具推陈出新且技术越来越成熟，随而言之北美认证机构UL也针对LED Driver 推出 Class P（过热保护型）测试和结构评估等要求，来满足灯具厂商能有弹性的去选择。Class P（过热保护型）主要是LED Driver 在设计上有保护组件，并再搭配LED 灯具上时如温度过高能及时的保护，避免火灾和电击的危险发生。

在结构要求上必须符合以下条件:
1. 在外壳要求上要去符合电气和防火外壳等相关要求（UL8750 第六章节）
2. 如外壳设计上是选用塑料外壳和外接配线的线材和端子耐温至少 90°C。
3. 供电和负载连接方式须符合 UL 8750 针对配线的相关要求

Type L 和Type R是UL服务类型。

Type L 是不能自印UL标签，必须得向UL购买标签。

Type R 是可以自印UL标签

Class P是产品分级。

TYPE TL型驱动替换的规则在UL1598的替换指引中有具体的规定：

1. Alternative Type TL drivers can be permitted without the need to conduct additional temperature tests
when all the following conditions are met.
a. The alternate Type TL driver input current and input power ratings are equal or lower than
that of the original Type TL driver ratings,
b. When the original Type TL LED driver is a constant current output type, the alternate Type
TL driver output current setting (if adjustable) or rating (if not adjustable) should be equal or
lower than that of the original TL driver;
c. When the original Type TL driver is a constant voltage output type, the alternate Type TL
driver output voltage rating should be equal to or lower than that of the original TL driver;
d. The alternate TL driver output power setting (if adjustable) or rating (if not adjustable) should
be equal or higher than that of the original TL driver;
e. The alternate Type TL driver should have a Tref max equal to or higher than the temperature
observed at Tc point on the original Type TL driver,
f. The alternate Type TL driver should have a Measured Tref equal to or lower than the
Measured Tref on the original Type TL driver,
In addition the following characteristics should be considered as part of the substitution decision.
g. The alternate Type TL driver has the same supply connection method as the original Type
TL driver,
h. The alternate Type TL driver should have the same input type as the original Type TL driver,
i. The alternate Type TL driver should have the same output type as the original Type TL driversee
notes below and
j. The alternate Type TL driver should have the same environmental condition rating as the
original Type TL driver- see notes below.
Notes:

a. LED drivers with isolated, Class 2 or LVLE output types are also acceptable as alternate for
a LED driver with non-isolated output. LED drivers with Class 2 or LVLE output types are also
acceptable as alternate for a LED driver with isolated output. LED drivers with Class 2 output
types are also acceptable as alternate for a LED driver with LVLE output.
b. LED drivers rated 2wet2 are also acceptable for use in damp and dry locations. LED drivers
rated 2damp2 are also acceptable for use in dry locations.
2. Alternate Type TL drivers not meeting all item 1 conditions above should be evaluated by test or
construction evaluation.
3. Manufacturers can implement a ‘no test’ substitution in production. UL Follow UP Representatives may
request any documentation related to the substitution choice during regular visits.