What is the difference between low voltage electrical and low voltage electrical appliances

The so-called low-voltage electrical refers to: DC voltage below 1500V, AC voltage below 1200V electrical equipment.

Low-voltage electrical appliances are components or devices that can manually or automatically turn on and off the circuit according to external signals and requirements, in order to realize the switching, controlling, protecting, detecting, transforming, and regulating the circuit or non-electric objects.