主要技術要求：
1、絕緣電阻：絕緣子在下列溫度條件下的絕緣電阻為：
（1）20±5℃時不小于1×10¹¹Ω。（2）125±2℃時不小于1×10¹⁰Ω。
2、機械試驗：絕緣子以下列機械條件試驗，玻璃應無裂痕，密封有破壞。
（1）振動試驗：振頻為50±5HZ、加速度為15g、振動3小時。
（2）沖擊試驗：沖頻為40～80次/分、加速度75g，沖擊次數4000次。
（3）離心試驗：加速度：50g，進行5分鐘。
3、潮濕試驗：絕緣子在溫度為40±2℃，相對濕度95±3%環境中，加額定直流工作電壓的120%條件作用下，經受240小時后，玻璃應無裂紋和密封性不破壞，絕緣電阻應不小于1×10¹⁰Ω。
4、高溫負荷：絕緣子在溫度為＋125℃，加額定直流工作電壓120%作用經240小時后，玻璃應無裂紋和密封性不破壞，絕緣電阻應不小于1×10¹⁰Ω。
5、溫度沖擊：絕緣子經－55～＋125℃三次溫度沖擊作用后，玻璃應無裂紋和密封性不破壞，絕緣電阻不小于10¹⁰Ω。
6、低氣壓試驗：絕緣子在表2中規定的低氣壓條件下，應能承受的相應1.2倍直流工作電壓值的試驗電壓的作用，而無擊穿和飛弧。
Main Technical Data
1、Insulation Resistance
（1） on less than 1×10¹¹Ω at 20±5℃　�。�2）on less than 1×10¹⁰Ω at 125±2℃
2、Mechanieal Test:These shall be no cracks with glass part and on damages to hermetic body.
(1)Vibration test:3 hours vibration at a frequency of 50±5HZ and an accelerating speed of 15g.
(2)Impact test:4000 times of impacts at an impact frequency of 40-80 times/min and and accelerating speed of 75g.
(3)Centrifugal test:5 minutes at.an accelerating speed of 50g.
3、Moist Test:Insulating resistance shall be no less than 1×10¹⁰Ω and there shall be no hydrolysis occurring with the glass part and no dumages to hermefic body after 240 hour test at the femperature of 95±% and under a load which is 120% of the rated DC working voltage.
4、Ltigh Temperature Load:Insulating resistauce shall nemain no less than 1×10¹⁰Ω and thest shall be no cracking with glass part and no damages to hermetic body through 240 hour test at the temperature of 125℃ and under a load which is 120% of the rated DC vohage.
5、Temperature Input:Insulating nesistauce shall vmain no less than 1×10¹⁰Ω and there shall be no cracking with glass part and no damages to hermetic body through three times of impacts in the femperature rauge of －55～＋125℃。
6、Low Atmospheric Pressme Test
These shall be no lrcakown or arcs occurring during the test with the voltage value white is 1.2 times as working volfage under the atmospheric corditious sa specifide in table 2.