The Megger CB101 is the most advanced circuit breaker analyzer on the market. It is the only analyzer that can test all types of circuit breakers, including molded case, air, vacuum, and SF6. The CB101 also has the widest range of test capabilities, including time-current, trip unit, and insulation resistance testing. With its intuitive user interface and rugged construction, the CB101 is the ideal choice for testing circuit breakers in any application.