1、The protector base adopts 35mm rail type or device type, and has two screw hole structures inside, which can be directly installed separately or HT35 rail. 2、Indicated by three indicators: normal, phase loss(voltage three-phase unbalance), reverse phase. 3、Phase loss protection means that when the protected line is in the running state or non-operating state, any phase failure occurs, and the delay is 2S. 4、Reverse phase protection, a protection measure to prevent L1, L2, L3 three-phase AC phase sequence from being connected incorrectly, delay 2S action. 5、Voltage imbalance protection, which refers to a protective measure that will affect the safe operation of the line due to three-phase voltage imbalance. Features: 1. The protector base adopts 35mm rail type or device type, and has two screw hole structures inside, which can be directly installed separately or HT35 rail. 3. Phase loss protection means that when the protected line is in the running state or non-operating state, any phase failure occurs, and the delay is 2S. 4. Reverse phase protection, a protection measure to prevent L1, L2, L3 three-phase AC phase sequence from being connected incorrectly, delay 2S action. 6. Widely used in air compressors, electric motors, distribution boxes, water pumps, oil pumps, central air conditioning units, etc. Specification: Condition: 100% Brand new Protection Function: Phase failure and phase sequence Display Mode: LED Indicates working status Contact form: Two sets of normally open normally closed contacts Contact Capacity: 6A AC250V (resistive) Installation Method: 35mm Rail or device Size: Approx. 79 x 23 x 79mm / 3.1 x 0.9 x 3.1in Package List: 1 x Protector Warning: This product is generally sampled on the power side of the three-phase power supply and must not be installed on the output side of the variable current.