Phase sequence tester designed to verify phase order quickly and reliably. - Easy connection: crocodile clips let you securely clamp onto control panel terminals, ensuring a safe and reliable connection during testing. - Clear indication: LED indicators show if a phase is open or not, with an audible buzzer for immediate notification. - Wide and practical range: capable of testing three-phase AC from 60 V to 600 V, suitable for common industrial systems. - Robust usefulness: simple, reliable tool for electrical diagnostic tasks without complex setup. 2-3 practical use scenarios: - Before starting a motor, verify the correct phase sequence to prevent equipment damage. - During electrical panel installation, quickly confirm phase order across all three phases. - In daily maintenance, diagnose phase-related issues on three-phase machinery in production lines. This device provides a straightforward, dependable solution for phase sequence verification in 60-600 V three-phase systems.