Part Identification and Key Ratings
The Schneider Electric LC3D150B7 is a TeSys D star delta starter, pre-wired, with 3 x 3P (3 NO) power poles rated at 150 A and a 24 V AC coil. It is designed for motor control applications under utilisation category AC-3, meaning it is specified for switching squirrel-cage motors during starting and disconnection while running — the duty cycle that governs contactor sizing in most industrial motor branches.
Environmental and Mechanical Compliance
The starter carries a fire resistance rating of 850 °C conforming to IEC 60695-2-1 and a V1 flame retardance rating per UL 94, which for panel builders means the enclosure materials self-extinguish within a defined time after ignition — relevant for compliance with IEC 60947-1 and UL 508A panel construction standards. Pollution degree 3 indicates suitability for industrial environments with conductive pollution or dry non-conductive pollution that becomes conductive due to condensation. The protective treatment is TH conforming to IEC 60068-2-30, certifying resistance to damp heat cyclic conditions. Mechanical robustness is specified for vibration at 2 Gn (5...300 Hz) with the contactor open and 4 Gn (5...300 Hz) closed, and shock resistance at 15 Gn for 11 ms closed and 6 Gn for 11 ms open. This means the starter can be installed on machinery subject to moderate vibration without risk of contact chatter or weld — typical for pump skids, conveyor drives, and compressor packages. Operating altitude is rated to 3000 m without derating. Ambient air temperature for operation is -40 to 60 °C, with derating required between 60 and 70 °C. Storage temperature range is -60 to 80 °C.