Dielectric Voltage-Withstand Test是UL817标准中的一个试验项目，意思是绝缘耐压测试。美规软线组件和电源软线UL817认证需要进行绝缘耐压测试，接下来为大家介绍UL817绝缘耐压测试。

UL817绝缘耐压测试

依据标准： 

UL817 （104.1 – 104.6）

测试对象：

电源线及电线组件

样品数量： 

Normal： 13 条

Tightened： 20 条

Reduced： 5 条

测试方法：

在电源线或电线组件的载流线之间以及载流线与地线之间按下述任意一种方式测试:

a) 1250V 交流 (40 – 70Hz), 1 分钟；

b) 1500V 交流 (40 – 70Hz), 1 秒钟；

c) 1770V 直流, 1 分钟；

d) 2100V 直流, 1 秒钟。

判定：

任何两根线间不能承受上述的测试均为不合格。

绝缘耐压测试-UL817标准要求

Dielectric Voltage-Withstand Test

104.1 Each cord set and power-supply cord shall be capable of withstanding without electrical breakdown，as a routine production line test，the application of a test potential between line conductors and between each line conductor and grounding conductor，if provided，using one of the following methods.

a) A1250Va-c(40-70Hz) test potential applied for 1 minute，

b) A1500Va-c(40-70Hz) test potential applied for 1 second，

c) A1770Vd-c test potential applied for 1 minute，or 

d) A2100Vd-c test potential applied for 1 second.

104.1 每一组电线和电源线应能承受不发生电击穿的情况，作为常规的生产线测试，使用下列方法之一，在导线之间和导线与接地导体之间施加测试电位。

a) A1250Va-c(40-70Hz)试验电势施加1分钟，

b) A1500Va-c(40-70Hz)试验电势施加1秒，

c) A1770Vd-c试验电势施加1分钟，或

d) A2100Vd-c试验电势施加1秒。

104.2 The test potential maybe gradually increased to the required value but the full value is to be applied for 1 second or 1 minute as required.

104.2 测试电位可能会逐渐增加到所需值，但应根据需要应用全部值1秒或1分钟。

104.3 The test equipment for a-c testing shall include a transformer having an essentially sinusoidal output.

104.3 用于交流测试的测试设备应包括具有基本正弦输出的变压器。

104.4 lf the output of the test equipment power-supply is less than 500VA，the equipment shall include a voltmeter in the output circuit to directly indicate the test potential，and an audible or visual indication of breakdown.In the event of breakdown，manual reset of an external switch is required or an automatic reject of the unit under test is to result.

104.4 如果测试设备电源的输出小于500VA，设备应在输出电路中包括电压表，以直接指示测试电位，并发出击穿的听觉或视觉指示。在发生故障时，需要手动复位外部开关或自动拒绝被测单元的结果。

104.5 If the output of the test equipment power-supply is500VAor larger，the test potential maybe indicated by a voltmeter in the primary circuit or in a tertiary winding circuit，by a selector switch marked to indicate the test potential，or by a marking in a readily visible location to indicate the test potential of equipment having a single test potential output.When marking is used without an indicating voltmeter，the equipment shall include a positive means such as a power-on lamp to indicate that the manual reset switch has been reset following a trip out.In the event of breakdown，manual reset of an external switch SW is required or an automatic reject of the unit under test is to result.

104.5 如果测试设备电源的输出大于500VA或更大，则测试电位可能由初级电路或三级绕组中的电压表指示，通过标记的选择开关来指示测试电位，或通过在容易看到的位置标记来指示测试电位的设备具有单一的测试电位输出。当在没有指示电压表的情况下使用标记时，设备应包括一个正向装置，例如上电灯，以指示手动复位开关在跳闸后已复位。如果发生故障，需要手动复位外部开关软件，否则将导致被测单元的自动拒绝。

104.6 Test equipment other than that described in 104.3-104.5 maybe used if found to accomplish the intended factory control.

104.6 除104.3-104.5所述设备外的测试设备，如果发现用于完成预期的工厂控制，则可以使用。