Features High Quality: The transfer switch is made of flame‑retardant plastic material, good insulation, high temperature resistance, safe and reliable. Operating Voltage: 220V. Please ensure your home voltage is stable,because the working voltage can not lower than 190V,or the ATS will not work. Working Principle: When the main power off, it can automatic transfer to generator (generator should be on),when the main power is restored,it will transfer to main power. Easy Installation: Reasonable structure, small size, equipped with protective cover, power supply is easy to install and reliable. Wide Applicability: The electronic circuit breaker is 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 SwitchModel: ZGQ5-100/2P 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 Rated Voltage: AC110-230V Working Voltage: AC220V Operation Mode: Automatic and manual ATS: CB level Conversion Time: ≤0.05 (S) Number of Poles: 2P How to Use: 1. Place the automatic transfer switch of the dual power supply on the debugging platform, and connect the corresponding power line in the correct phase sequence. The phase line and the neutral line are connected in position and cannot be connected wrongly.2. When debugging the three-pole switch, the common and spare neutral wires should be connected to the neutral terminal (NN and RN) respectively.3. Set the dual-power automatic transfer switch to work in the self-turning and self-resetting mode. If the voltage of the two power supplies is normal, the switch should be placed in the common power supply position and the common power supply is closed. 4. Set the common power supply NA, NB, NC, NN for any phase failure, 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. 5. Adjust the voltage of any phase of the common power supply to the predetermined undervoltage voltage value, and the dual power supply should automatically switch to the standby power supply. When the normal power supply returns to normal, the switch should return to the normal power supply. Package List:1 x Dual Power Automatic Transfer Switch1 x User Manual  Package List 1 x Dual Power Automatic Transfer Switch 1 x User Manual