The SM852B 3-phase rotation tester is a digital phase indicator detector with LED and buzzer alerts, designed to verify phase sequence and detect open phases. It is a reliable tool for checking three-phase systems, featuring terminal clips for secure and safe connections. The device supports a wide voltage range from 60V to 600V AC and operates at frequencies between 20Hz and 400Hz. It provides visual and audible indications: a green LED with intermittent beep for correct phase sequence and a red LED with continuous beep for reverse sequence.Constructed from plastic and metal, the tester is built for durability and safe operation. It has a maximum impulse voltage rating of 4000V and can withstand up to 2000V for one minute. Continuous usage is rated up to 60 minutes at 60V AC and up to 4 minutes at 600V AC. The compact and lightweight design measures 85 x 64 x 23mm (3.3 x 2.5 x 0.9 inches) and weighs 120g (4.2 ounces). The package size is 120 x 100 x 50mm (4.7 x 3.9 x 2.0 inches) with a total weight of 200g (7.1 ounces).Package includes: 1 x Phase indicatorKey Features: - Detects phase sequence and open phase conditions - Wide input voltage range: 60V to 600V AC (three-phase) - Clear LED indicators and audible buzzer for easy operation - Portable, compact, and lightweight for convenient transport - Secure terminal clips ensure reliable connections - Visual and audible alerts for correct and reverse phase sequences - Dimensions: 85 x 64 x 23mm (3.3 x 2.5 x 0.9 inches) - Weight: 120g (4.2 ounces)