工gong業ye現xian場chang的de環huan境jing比bi普pu通tong環huan境jing都dou要yao惡e劣lie，至zhi少shao在zai震zhen動dong，濕shi氣qi，溫wen度du上shang都dou要yao比bi普pu通tong環huan境jing惡e劣lie，普pu通tong交jiao換huan機ji在zai設she計ji上shang沒mei有you抵di禦yu在zai工gong業ye環huan境jing中zhong出chu現xian的de各ge種zhong情qing況kuang的de能neng力li
，普pu通tong交jiao換huan機ji不bu能neng長chang時shi間jian工gong作zuo在zai這zhe種zhong惡e劣lie環huan境jing下xia，經jing常chang容rong易yi出chu現xian故gu障zhang
，更geng使shi維wei護hu成cheng本ben上shang升sheng，一yi般ban不bu建jian議yi在zai工gong業ye環huan境jing中zhong使shi用yong商shang業ye交jiao換huan機ji，為wei了le能neng使shi交jiao換huan機ji在zai這zhe種zhong惡e劣lie環huan境jing中zhong使shi用yong，故gu生sheng產chan出chu能neng適shi應ying這zhe種zhong環huan境jing的de交jiao換huan機ji
，工gong業ye級ji別bie的de交jiao換huan機ji的de可ke靠kao性xing有you電dian源yuan故gu障zhang，端duan口kou中zhong斷duan，可ke由you繼ji電dian器qi輸shu出chu報bao警jing，冗rong餘yu雙shuang直zhi流liu電dian源yuan輸shu入ru，主zhu動dong式shi電dian路lu保bao護hu，過guo壓ya
、欠壓自動斷路保護。