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A relay coil driving heavy-current contacts.
Also known as: Motor starter symbol, Power relay symbol
A contactor is an electrically operated switch built to make and break motor-sized currents, drawn as a coil beside a set of contacts. It is the same principle as a relay at a different scale, and the distinction is one of duty rather than of drawing.
Denotes an electrically operated switch for heavy currents, typically switching motors and other loads.
Contexts: Technical drawing, Electrical equipment
Differs from a relay by duty rather than by principle: both are a coil operating contacts, and a contactor is built for load current rather than signal switching.
Contexts: Technical drawing, Electrical equipment
A rectangle representing a coil connected by a broken line to a group of parallel contact lines.