The Schneider Electric TeSys LG LG7D18Q7 is an enclosed direct-on-line (DOL) starter — a self-contained motor-starting package that combines a contactor and overload protection in a single polycarbonate enclosure, ready for wall or machine mounting. The device composition requires a circuit-breaker ordered separately — the starter itself integrates the contactor and the enclosure but not the upstream short-circuit protection. The utilisation category AC-3 confirms it is designed for starting squirrel-cage motors and switching them off only after they are up to speed, not for plugging or inching duty.
Physical fit and integration notes
The enclosure dimensions are 175 mm wide by 165 mm high by 146 mm deep. That footprint fits on a standard machine-mounting plate or wall bracket; it is not a DIN-rail-mount device, so plan for screw-fixing through the enclosure's own mounting lugs. The polycarbonate material is lightweight and non-corrosive, suited for food-and-bev or chemical environments where stainless steel enclosures would be overkill. The cable entries — four knockouts at top and bottom, two Pg 13 and two Pg 16 per face — accept standard metric cable glands. For a typical 4-core motor cable up to 4 mm², a Pg 16 gland is adequate. The push-button control circuit is pre-wired to the white start, black stop, and red mushroom-head emergency stop; no additional control wiring is needed beyond the 380 V AC supply to the coil circuit.