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Dielectric Voltage-Withstand Test是UL817標準中的一個試驗項目，意思是絕緣耐壓測試。美規軟線組件和電源軟線UL817認證需要進行絕緣耐壓測試，接下來為大家介紹UL817絕緣耐壓測試。

UL817絕緣耐壓測試

依據標準： 

UL817 （104.1 – 104.6）

測試對象：

電源線及電線組件

樣品數量： 

Normal： 13 條

Tightened： 20 條

Reduced： 5 條

測試方法：

在電源線或電線組件的載流線之間以及載流線與地線之間按下述任意一種方式測試:

a) 1250V 交流 (40 – 70Hz), 1 分鐘；

b) 1500V 交流 (40 – 70Hz), 1 秒鐘；

c) 1770V 直流, 1 分鐘；

d) 2100V 直流, 1 秒鐘。

判定：

任何兩根線間不能承受上述的測試均為不合格。

絕緣耐壓測試-UL817標準要求

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 每一組電線和電源線應能承受不發生電擊穿的情況，作為常規的生產線測試，使用下列方法之一，在導線之間和導線與接地導體之間施加測試電位。

a) A1250Va-c(40-70Hz)試驗電勢施加1分鐘，

b) A1500Va-c(40-70Hz)試驗電勢施加1秒，

c) A1770Vd-c試驗電勢施加1分鐘，或

d) A2100Vd-c試驗電勢施加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 測試電位可能會逐漸增加到所需值，但應根據需要應用全部值1秒或1分鐘。

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

104.3 用于交流測試的測試設備應包括具有基本正弦輸出的變壓器。

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 如果測試設備電源的輸出小于500VA，設備應在輸出電路中包括電壓表，以直接指示測試電位，并發出擊穿的聽覺或視覺指示。在發生故障時，需要手動復位外部開關或自動拒絕被測單元的結果。

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 如果測試設備電源的輸出大于500VA或更大，則測試電位可能由初級電路或三級繞組中的電壓表指示，通過標記的選擇開關來指示測試電位，或通過在容易看到的位置標記來指示測試電位的設備具有單一的測試電位輸出。當在沒有指示電壓表的情況下使用標記時，設備應包括一個正向裝置，例如上電燈，以指示手動復位開關在跳閘后已復位。如果發生故障，需要手動復位外部開關軟件，否則將導致被測單元的自動拒絕。

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所述設備外的測試設備，如果發現用于完成預期的工廠控制，則可以使用。