Low voltage electrical appliances usually refer to electrical appliances that operate at an AC voltage of 1200V or a DC voltage of 1500V or below. Common low-voltage devices include switches, fuses, contactors, leakage protectors, and relays What are the classifications of low-voltage electrical appliances According to the action mode, it can be divided into manual appliances and automatic appliances Manual electrical appliances: knife switches, button switches, etc Automatic electrical appliances: such as contactors, relays, etc According to their purpose, they can be divided into low-voltage control appliances and low-voltage protection appliances Low voltage control appliances: knife switches, low-voltage circuit breakers, etc Low voltage protective appliances: fuses, thermal relays, etc According to their types, they can be divided into knife switches, knife type transfer switches, fuses, low-voltage circuit breakers, contactors, relays, main electrical appliances, and automatic switches What are the testing items for low-voltage electrical appliances Routine testing, voltage drop measurement, temperature rise experiment, insulation resistance and withstand voltage test, rated making and breaking capacity test, short circuit making and breaking capacity test, short time withstand current capacity test, action characteristic test, life test, immunity test, characteristic test, etc What are the methods for detecting voltage

Temperature rise test, insulation resistance and withstand voltage test, rated making and breaking capacity test, short-term withstand current capacity test, action characteristic test, life test, and special test