The classification of low-voltage and high-voltage electrical appliances is primarily based on their voltage range.
Voltage Range
Low-voltage electrical appliances: These typically refer to electrical equipment operating below 1000V AC or 1500V DC. Common examples include switches, fuses, contactors, residual current devices (RCDs), and relays.
High-voltage electrical appliances: These refer to electrical equipment operating above 1000V AC or 1500V DC. These devices are mainly used for power transmission and distribution, such as transformers and circuit breakers.
Application Scenarios
Low-voltage electrical appliances are mainly used in daily life and industrial production, such as household circuit control and small motor control. They achieve switching, control, protection, detection, transformation, and regulation of circuits or non-electrical objects by manually or automatically connecting and disconnecting circuits.
High-voltage electrical appliances are used for power transmission and distribution, ensuring that electrical energy is transmitted over long distances with minimal loss. For example, transformers and circuit breakers play a crucial role in power systems.
Safety and Operating Environment
Low-voltage electrical appliances are generally safe to use in normal environments and conditions, and usually do not require special protective measures.
High-voltage electrical appliances require special attention to safety during use because high voltage electricity is highly dangerous. Appropriate protective measures must be taken when operating high-voltage electrical appliances, and a safe distance must be maintained to prevent electric shock and other safety accidents.
