Features Stable Materials: The 4P power transfer switch adopts PC flame retardant shell, which has good insulation and high temperature resistance, and the silver alloy contacts ensure good conductivity. Switch Function: Dual power manual transfer switch, which is used to switch the dual power supply circuit, the rated voltage is 400VAC and the current is 63A, with overload protection and short circuit protection. Single Side Interlock: The handle of the right circuit breaker is interlocked with the internal trip mechanism of the left one. Opening the right circuit breaker will cause the left one to trip. When the right circuit breaker is opened, the left cannot be opened. Wide Application: The manual transfer switch adopts 35mm DIN rail installation, which is convenient and practical, and is widely used in home, RV, generator, or other dual power supply system. 3 Color Window: This dual power supply transfer switch has 3 color indication window, where red represents tripping, yellow represents overload protection, and green represents normal operation. Specification: Item Type: Dual Power Manual Transfer Switch Model: NLZ1 63 Material: PC Flame Retardant, Silver Rated Voltage: 400VAC Current: 63A Rated Frequency: 50/60HZ Poles: 4P Short Circuit Connection Capacity: 3000A Short Time Withstand Current: 1500A/1s Electrical Life: >1500 Times Mechanical Life: >8500 Times Protection Grade: IP20 Ambient Temperature: -5℃-40℃ Terminal Cable Size: 16mm² Installation: 35mm DIN Rail 3 Color Window: Red (Tripping), Yellow (Overload Protection), Green (Normal Operation) Size: Approx. 72 x 85 x 63mm / 2.8 x 3.3 x 2.5in How to Use: Refer to the product images to learn how to use. Package List: 1 x Dual Power Manual Transfer Switch Package List 1 x Dual Power Manual Transfer Switch