Features: 1.Dual Power Supply: 2P 40A Dual Power Automatic Transfer Switch, A Is The Common Power Supply And B Is The Backup Power Supply, Suitable For Ac System With A Frequency Of 50/60Hz. 2.Working Principle: When The Main Power Supply (A) Fails, The Transfer Switch Will Automatically Switch To The Backup Power Supply (B) To Continue Working, With A Switching Speed Of Less Than 50Ms. 3.Good Performance: The Rated Current Is 40A, The Insulation Voltage Is 690Vac, And Has A Wide Range Of Application, Effectively Solving The Faults And Inconveniences Caused By Power Outages. 4.Flexible Installation: The 2P Dual Power Changeover Switch Has A Simple Structure That Can Be Installed Vertically Or Horizontally In The Cabinet, Adapting To More Installation Environments. 5.Flame Retardant Shell: The Automatic Transfer Switch Housing Is Made Of Flame Retardant Pc Material, Which Has High Strength, Heat Resistance, Impact Resistance, And Long Service Life. Specification Item Type: Dual Power Automatic Transfer Switch Rated Current: 40A Insulation Voltage: 690Vac Class: Pc Frequency: 50/60Hz Standard: Iec60947-6 Rated Short Circuit Current Limit (Rt16-00/63A): 50Ka Operating Temperature Range: -5℃-40℃, The Average Temperature Within 24 Hours Should Be Lower Than +35℃ Storage Temperature Range: -25℃-55℃, Up To +70℃ In A Short Time (Within 24 Hours)