4pol

4pol is a shorthand term used to indicate a four-pole configuration or four-conductor arrangement. It is not a standalone organization or product line; rather, it appears in multiple technical domains to denote the presence of four distinct electrical paths or poles.

In electrical engineering, four-pole devices include motors, generators, transformers, and connectors that provide four independent electrical paths. The pole count influences dynamic and electrical characteristics: for rotating machines, the synchronous speed is given by n_s = 120 f / P, so a four-pole machine runs more slowly than a two-pole machine at the same frequency, affecting torque, startup behavior, and efficiency. Four-pole designs are common in low- to medium-speed applications such as industrial drives, pumps, and wind turbines. In connectors and cables, 4-pol variants carry four separate circuits in one housing and are used for combined power and signal transmission, such as in some automotive or industrial applications. In RF and filter design, four-pole networks describe transfer functions with four reactive elements, influencing bandwidth and selectivity.

Branding note: Some manufacturers use 4POL in product names to emphasize a four-pole characteristic. Because 4pol is a general descriptor rather than a single standard, interpretation depends on context; readers should refer to the specific device's specification to confirm the exact meaning of "4-pol." Related concepts include four-pole machines, four-pole connectors, and four-pole networks.