This three-phase rotation tester is designed to check the phase sequence and indicate if any phase is open. Features: Dual Functions: Check phase sequence and detect if a phase is open. Safe and Reliable: Equipped with clips for secure connection to control panel terminals. Wide Voltage Range: Tests voltages from 60V to 600V AC within three phases. User-Friendly: LED light and buzzer for easy phase condition indication. Portable Design: Compact and lightweight for convenient carrying. Specifications: Material: Plastics and metal Operation Voltage: 60V - 600V AC three-phase Limit Support Voltage: 2000V/minute (impulse voltage 4000V) Operation Frequency Range: 20Hz - 400Hz Limit Time for Continuous Use: 60 minutes maximum at 60V-AC 4 minutes maximum at 600V-AC Phase Sequence Indicator LED: Green for correct phase sequence, intermittent beep Red for reverse phase sequence, continuous beep Item Size: 85 x 64 x 23mm (3.3 x 2.5 x 0.9in) Item Weight: 120g (4.2 ounces) Package Size: 120 x 100 x 50mm (4.7 x 3.9 x 2.0in) Package Weight: 200g (7.1 ounces) Packing List: 1 x Phase Indicator