The Extech PRT200 is an essential and professional tool for electricians and engineers to test a 3-phase electrical system. It features "non-contact measurement" technology, meaning it can determine the phase rotation and direction by simply placing the clamps on the outer insulation of the wires without needing to touch exposed metal parts, ensuring maximum safety. Features and Technical Specifications: Safe Measurement: Checks phase sequence and rotation direction without direct metal contact. Voltage Range: Operates on a wide voltage range from 75 to 1000V AC. Frequency: Supports frequencies from 45 to 65 Hz. Dual Alerts: Equipped with bright LED indicators and audible buzzer alerts to indicate rotation direction (clockwise or counterclockwise). Lighting Control: Special button to adjust indicator brightness (Hi/Lo) for clear visibility in dark places or under direct sunlight. High Safety: Holds safety ratings of CAT IV 600V and CAT III 1000V. Auto Power Off: Energy-saving feature to automatically shut down when not in use. Ease of Use: Color-coded clamps (Red, White, Blue) for easy connection and identification of lines (L1, L2, L3). ### WhatsApp Communication ###