A 3-pole Swiss plug insert refers to the electrical plug component used in Switzerland and some other countries that adhere to Swiss electrical standards. Here are the key features and characteristics associated with a 3-pole Swiss plug insert:

1. Number of Poles: The plug insert has three poles, which are the metallic pins or prongs that make electrical contact with the socket. The three poles typically consist of two live/phase pins and one neutral pin.

2. Swiss Standard: The 3-pole Swiss plug insert is specifically designed to comply with Swiss electrical standards, which dictate the dimensions, configuration, and safety requirements for electrical plugs used in the country.

3. Compatibility: The plug insert is designed to fit into Swiss electrical sockets and is not compatible with sockets from other countries or regions unless adapters or converters are used.
   

4. Configuration: The plug insert features a specific configuration of the three poles, ensuring proper alignment and connection with the corresponding sockets. The configuration may vary depending on the specific Swiss plug standard in use.

5. Grounding: The 3-pole Swiss plug insert may also include a grounding contact, which provides an additional safety feature for electrical devices that require grounding.

6. Safety Features: The plug insert may incorporate safety features such as insulation, protection against electric shocks, and mechanisms to ensure a secure connection with the socket.

It's worth noting that Switzerland has its own unique electrical plug standards, which differ from those used in other countries. Therefore, if you are traveling to Switzerland or using Swiss electrical devices, you may need a specific adapter or converter to plug in and use your devices with a 3-pole Swiss plug insert. It's important to ensure compatibility and follow local electrical regulations and safety guidelines when using electrical plugs and devices in any country.