Feature: 1. The use of silver contacts can greatly improve the conductivity and service life of the product 2. Built‑in regular standby opening signal output port, which can be connected with signal indicator light, which is convenient for observation outside the cabinet 3. Using high‑quality flame‑retardant plastic material, good insulation, high temperature resistance, anti‑aging, safe and reliable 4. When the normal power supply is abnormal, the backup power supply will work immediately to ensure the continuity, reliability and safety of the power supply 5. Suitable for switching to the backup power supply when the power is cut off, and switching to the main power supply when the power comes in Specification: Item Type: Dual Power Automatic Transfer Switch Model: ZGQ5-100/4P Material: Plastic Purpose: Switch to the backup power supply when the power fails, and switch to the main power supply when the power comes in Working Frequency: 50-60HZ Rated Current: 100A Operation Mode: Automatic and manual ATS: CB level Conversion Time: ≤0.05 (S) Number of Poles: 4P How to Use: 1. Place the automatic transfer switch of the dual power supply on the debugging platform, and connect the corresponding power line according to the correct phase sequence. The phase line and the neutral line are connected in position, and the wrong connection is not allowed. 3. When debugging the three-pole switch, the common and spare neutral wires should be connected to the neutral terminal (NN and RN) respectively. 4. Set the common power supply NA, NB, NC, NN for any phase loss, the dual power supply should be automatically converted to the backup power supply, if the common power supply returns to normal, it should be converted back to the common power supply. Package List: 1 x Dual Power Automatic Transfer Switch1 x User Manual