MIT525-US 5KV Insulation TesterMIT525 US Insulation Tester 5kV IRT, IR, IR(t), DAR, PI, DD, SV, Ramp, USB, US plug Megger's 5 kV, 10 kV, and 15 kV DC insulation testers set the industry standard for insulation resistance testing. Designed for diagnostic testing and maintenance of high voltage electrical equipment, these rugged, portable instruments offer unparalleled performance, safety and reliability for OEMs, industrial companies, electrical contractors and utility providers.