Insulation Tester iyithuluzi elisebenza ngobuchwepheshe elakhiwe futhi lakhiqizwa yi-HV HIPOT ngokuya nge-IEC 61010-1 namanye amazinga afanele. Lisetshenziselwa ukukala ukumelana nokufakwa kukagesi (insulation resistance) kwamabhange kagesi (power transformers), izintambo, izinjini, imigqa, nezinto zokwakha. Lisebenzisa ubuchwepheshe bokufaka ugesi ophezulu we-DC ukuze likhiphe ugesi ozinzile we-DC kudivayisi elihlolwayo ngokusebenzisa ijenereyitha yangaphakathi enembile yokukhiqiza ugesi ophezulu, likale ngokunembile umsinga ovuzayo (leakage current) futhi libale ngokuzenzakalelayo inani lokumelana nokufakwa kukagesi.