Feature 1AUTOMATIC RESET: The protector has an automatic reset function, which can prevent long term power failure and ensure its service life. 2QUICK RESPONSE: The protector has a quick response speed and sensitive internal components, saving you working time and making it more practical. 3DIGITAL DISPLAY: The digital display screen displays the working voltage and current in real time, you can monitor the abnormality and use it with confidence. 4EASY INSTALLATION: This 3 phase protector is installed by DIN rail, which is simple and easy to operate, and is stable and firm after installation. 5SAFE TO USE: When the protector is overloaded, it will automatically cut off the power, and the power will be supplied normally within the specified power, so as to prevent the danger of overvoltage and undervoltage.SpecificationItem Type: 3 Phase DIN Rail Voltmeter Material: PCModel: CHSG 40Load Current: 1-63AOvervoltage Setting Value: AC390-500VUndervoltage Setting: AC370V-140VPower Off Time (Set 1-300s): 5-300S(V), 30-300S(I)Installation: Approx. 35mm x 1.4in DIN rail .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x 3 Phase DIN Rail Voltmeter1 x Instruction