1. Comprehensive Protection: This JVR1000AN voltage phase sequence protection provides complete monitoring for threephase fourwire systems (115–277 VAC), protects against overvoltage, undervoltage, voltage imbalance, phase errors, phase loss, and neutral line disconnection with adjustable protection thresholds for individual electrical . 2. Intuitive LCD Display: With a clear LCD screen that displays voltage values in real time, fault status, and setting parameters, allowing you to easily monitor electrical conditions and quickly identify problems before they cause damage to your valuable equipment. 3. Flexible Configuration: It has adjustable ranges for overvoltage (80–330 V), undervoltage (80–330 V), imbalance rate (1–50 %), and action delay times (0.1–999s), with automatic and manual reset modes to meet specific application requirements. 4. and Integration: Designed for standard 35mm DIN rail mounting with compact dimensions (80 × 43 × 54 mm), this protection features two output s (1 changeover 1 normally closed), rated at 6 A 250 VAC for seamless integration into existing control systems.