The Vanguard CT-6500-3 Digital Circuit Breaker Analyzer is an inexpensive, easy to use, stand alone, microprocessor driven EHV circuit breaker analyzer. The CT-6500-3 model is the 3 dry contact input version. The CT-6500-3 can fully analyze a circuit breaker’s performance by testing the contact time, stroke, velocity, over-travel, bounce-back and contact wipe. Contact motion analysis can be performed for all circuit breaker operations (Open, Close, Open-Close, Close-Open and Open-Close-Open). The CT-6500-3’s timing window is selectable between 1-second, 10-second, or 20-second periods. The 10-second and 20-second timing windows are ideal for timing long duration events such as circuit switcher contact testing.