3F extension cords for power supply

Main Properties of Three-Phase Extension Cords:

Voltage and Number of Phases: A voltage of 380–400 V is used for larger electrical devices, such as industrial motors, compressors, pumps, and other heavy equipment. They connect to a three-phase system that uses three phases to transmit electrical energy.
Higher Power: Three-phase extension cords are designed for high-power devices that require more electricity than household appliances. This allows for more efficient load distribution across the three phases, reducing wire load and electrical losses.
Special Connectors: Three-phase extension cords typically use CEE connectors designed for higher current flows. These connectors are highly reliable and ensure safe transmission of three-phase current. CEE connectors are color-coded (usually red) for easier identification from single-phase extension cord connectors.
Strong and Durable Cable: The wires of three-phase extension cords are thicker as they need to carry larger loads. They typically have stronger insulation, resistant to mechanical damage, moisture, and extreme conditions. The wire diameter can be larger, e.g., 4 mm² or more, to ensure proper power transmission.

Length and Mobility: Three-phase extension cords can be of various lengths, often ranging from 10 to 50 meters, with some special models potentially being longer depending on needs. This allows devices to be connected in remote locations, such as construction sites.

Number of Sockets: Typically, three-phase extension cords have one outlet, as they are mostly used for high-power devices. Some models may have more than one socket, but this is a less common configuration.
Protection Features:

Many three-phase extension cords have overload and short-circuit protection, which is essential for high-power devices. This helps protect devices from electrical surges or other disruptions.
Some models feature additional insulation resistant to moisture and dust (IP protection classes).
Areas of Use:

Industry: In industrial facilities requiring three-phase power, such as production lines, motors, machines, lifting equipment, etc.
Construction: On construction sites, where powerful tools and equipment are used, e.g., concrete mixers, hoists, air compressors, etc.
Energy and Infrastructure: For network maintenance work, temporary power supplies, or high-power device testing.
Choosing a Three-Phase Extension Cord:

Consider the required load: Check that the extension cord can withstand the power required by your device. This is important to avoid overload and current losses.
Insulation and Protection Class: If the extension cord will be used outdoors or in adverse conditions, choose a model with a high IP protection rating.
Cable Length and Diameter: Thicker wires are needed for longer distances to avoid voltage drops and ensure stable power supply.

Three-phase extension cords are essential where reliable, high-power electrical supply is needed, making them widely used in industry, construction, and other high-power systems.