Feature: 1. 2 Operation Modes: This dual power transfer switch supports manual and automatic operation, fast switching without power outage, easy maintenance, and is widely used in situations where continuous power outages are not allowed. 2. Main Function: Mainly used to test whether the main or backup power supply is normal. When there is an abnormality in the main power supply, the backup power supply will work immediately to ensure continuity, reliability, and safety. 3. 35mm Rail Mount: This 4P power changeover switch has a compact structure, which is easy to install and maintain, and using 35mm standard rail installation, specifically designed for PZ30 distribution box. 4. Applicable Fields: This dual power changeover switch is suitable for emergency power supply system with 50/60Hz AC rated 220V, and suitable for places such as factories, shopping malls, and seedling farms. 5. Durable Materials: The changeover switch is made of PC flame retardant plastic with good insulation, high temperature resistance and aging resistance, the silver contact with terminal protection cover can improve the conductivity and service life. Specification: Item Type: Dual Power Automatic Transfer Switch Model: NLQ5-100/4P Material: PC Flame Retardant, Silver Insulation Voltage Ui: AC690V 50Hz Rated Voltage Ue: AC400V 50Hz Grade: PC Class Specification: 4P Rated Control Voltage US: 220VAC 85%Us-110%Us Life: Electrical: 2000 Times; Mechanical: 5000 Tmes Rated Short Circuit Current: 50kA Fuse: RT16-00-63A Rated Impulse Withstand Voltage: 8kV Auxiliary Circuit: 2 relays, each with 2 sets of contacts capacity: AC220V 50Hz le=5y Touch Time: <50ms Switching Time: <50ms Return Time: <50ms Closing Time: <50ms Size: Approx. 143 x 96 x 69mm / 5.6 x 3.8 x 2.7in. Package List: 1 x Dual Power Transfer Switch 2 x Protective Covers 1 x Accessory 1 x User Manual Note: 1. The maximum ambient temperature should not exceed 40℃, and the minimum should not be lower than ‑5℃. The average temperature within 24 hours should not be higher than 35℃. 2. The altitude at the installation site should not exceed 2000m. 3. When the maximum temperature reaches 40℃, the relative humidity at the installation site should not exceed 50%. When the temperature is at the lowest ‑5℃, the relative humidity is higher. For example, if the temperature is 25℃, the relative humidity would be 90%. Due to temperature changes, special measures should be taken to deal with occasional condensation on the surface of the product.