1. Made of high-quality material, durable with a long service life. 2. Compact design, ideal replacement for old or damaged unit; easy to install. 3. The protective functions of the relay are not affected by circuit or load current intensity, impulse current, unbalanced current, or load characteristics. 4. The relay can operate continuously at full capacity under various climate conditions with power consumption under 2W. 5. This protection relay features phase loss protection, phase reversal protection, voltage imbalance protection, and time delay protection. Specification: Condition: New Item: Protection Relay Working Characteristics: 1. When the L1, L2, and L3 phase connections are correct, the green indicator light illuminates and the relay closes. If the phase sequence is incorrect, the yellow light illuminates. Swapping any two phases will allow the relay to accept the correct sequence and operate normally. If the yellow light remains on and the relay does not close after normal equipment operation, this indicates an incorrect external wiring connection. The relay includes protection against incorrect wiring. 2. If any of the L1, L2, or L3 phases experiences a lost phase (no phase), the red light turns on, the green light turns off, and the relay releases. When voltage returns to normal, the relay automatically recovers, the green light turns on, and the relay closes. 3. L1, L2, and L3 connect to three-phase AC power. NO and COM are normally open contacts; NC and COM are normally closed contacts. Use wires to connect terminals directly. Color: Gray + Black Material: Plastic + Metal Package Contents: 1 x Phase Sequence Protection Relay Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.