Digital insulation testing up to 10kV. The redesigned Fluke 1550C insulation resistance tester, offers digital insulation testing up to 10kV, making them ideal for testing a wide range of high voltage equipment including switch gear, motors, generators and cables. Fluke insulation testers can now conduct the entire range of test voltages specified in IEEE 43-2000 with a best in class, 3 year warranty and CAT IV 600 V safety rating. With measurement storage and PC interface, the 1550C is perfect tools for preventative or predictive maintenance programs designed to identify potential equipment failures before they occur.