Feature: 1. PC GRADE SWITCH: This dual power automatic transfer switch is designed for infrequent switching and features a dual position design (A as the primary power source and B as the backup power source). It is suitable for AC systems with a frequency of 50 to 60Hz. 2. SEAMLESS POWER TRANSFER: The main function of this automatic transfer switch is to automatically switch to the backup power source (B) when the primary power source (A) fails, ensuring uninterrupted operation (switching time less than 50 milliseconds) and effectively resolving issues caused by power outages. 3. WIDE TEMPERATURE RANGE: Designed to operate in a temperature range of ‑5℃ to +40℃, with an average temperature below +35℃ within 24 hours. It can also withstand storage temperatures ranging from ‑25℃ to +55℃, with a short term tolerance of up to +70℃ within 24 hours. 4. HUMIDITY CONTROL: When the ambient temperature is +40℃, the relative humidity at the installation site should not exceed 50%. The relative humidity can be higher at lower temperatures. For example, when the average lowest temperature in the most humid month is +20℃, the maximum average relative humidity for that month can arrive 90%. Appropriate measures should be taken to prevent condensation caused by temperature changes. 5. POLLUTION RESISTANCE: With a pollution degree of 3 (conductive pollution or non conductive pollution that becomes conductive due to condensation), this ATS can be installed vertically or horizontally in cabinet applications, ensuring reliable performance even in polluted environments. Specification: Item Type: Dual Power Automatic Transfer Switch Material: PC Flame Retardant Rated Current In: 63A Insulation Voltage Ui: 690VAC Grade: PC Frequency: 50 60Hz Standard: For IEC60947 6 Rated Short Circuit Current Limit (RT16 00 63A): 50KA. Package List: 1 x Switch Note: 1. Maintenance and inspection should be carried out by professionals.2. In order to ensure good ATS performance, the first maintenance and inspection should be carried out within 6 months after use. Then at least once a year maintenance and inspection. In poor installation conditions, the frequency of maintenance and inspection should be increased.3. Check whether the electrical contact parts are deformed or damaged, and clean the surface.4. Metal particles and scorch around. Corrosion, acidification, and dust on the contact surface can cause poor contact, so perform manual operations and measure the necessary contact resistance: If the ATS is wet or has not been used for a long time, dry it before powering it on. After removing dust, use a 500V megohm meter to measure the insulation resistance of the normal power supply and the AC power supply. The load side and poles include insulation resistance, which should not be less than 10MQ when live parts and metal plates are used.