The Schneider Electric TeSys LG7D18V721 is an enclosed direct-on-line (DOL) starter combining a contactor and circuit-breaker in one IP55 polycarbonate enclosure. It is rated for AC-3 motor duty and provides thermal protection adjustable from 17 to 23 A, with a 400 V AC 50/60 Hz control coil. The unit includes push-button start (white I), stop (black O), and a mushroom-head emergency stop (red) — a self-contained safety solution for motor control panels.
The thermal protection range of 17...23 A sets the motor full-load current it can protect. Cable entry provision: four knockouts — two Pg 13 and two Pg 16 — on both top and bottom faces, giving flexibility for conduit or gland routing. The polycarbonate enclosure measures 175 mm wide × 165 mm high × 146 mm deep.
The starter complies with IEC 60204-1 (safety of machinery — electrical equipment) and IEC 60947-4-1 (contactors and motor-starters). These are the core standards for industrial motor control in European and many international installations. The IP55 and IK07 ratings are certified per IEC 60529 and IEC 60529 respectively.