The Schneider Electric TeSys F LC3F225E7A64 is a pre-wired star delta starter designed for motor control applications. It integrates three contactors with mechanical interlocking into a single unit, reducing panel wiring and commissioning time. The unit is rated for AC-3 utilisation category, meaning it is built for switching squirrel-cage motors during starting, running, and stopping — the standard duty for motor starters. Rated operational current is 225 A at up to 440 V AC for the power circuit, which translates to motor power ratings of 200 kW at 380/400 V AC and 220 kW at 440 V AC. The control circuit operates on 48 V AC at 50/60 Hz, with a pickup range of 0.85 to 1.1 Uc and dropout between 0.35 and 0.55 Uc. This 48 V coil is a common choice for control transformers in industrial panels, keeping the control voltage at a safer level than line voltage.
The LC3F225E7A64 carries a rated breaking capacity of 1800 A and a rated making capacity of 2250 A, both conforming to IEC 60947-4-1. The associated fuse recommendation is 315 A gG or 250 A aM at up to 440 V, which is the fuse size the manufacturer expects for short-circuit protection. For a star delta starter, the operating time is 20 to 35 ms for closing and 7 to 15 ms for opening, with a starting time of 30 s — this is the transition delay between star and delta configurations. The unit is plate-mounted (not DIN rail), so factor in panel space for the 525 mm width, 110 mm height, and 235 mm depth. Rated insulation voltage is 1000 V per IEC 60947-4-1, with an operating altitude of 3000 m without derating. The TH protective treatment indicates the unit is tropicalised for humid environments.
The LC3F225E7A64 comes pre-wired with three contactors: KM1 (star), KM2 (line), and KM3 (delta). Auxiliary contact composition is 1 NC + 1 NO for the star contactor, 2 NC + 1 NO for the line contactor, and 1 NC + 2 NO for the delta contactor — enough for status feedback and interlocking without adding external aux blocks. Power connections are via bolted busbars (32 x 4 mm cross-section) or ring terminals up to 185 mm², with an M10 bolt diameter. Control circuit terminals are screw clamp, accepting 1 to 4 mm² solid or flexible wire. Tightening torque is 1.2 N·m for control circuit terminals and 35 N·m for power circuit connections — the power terminations require a torque wrench to avoid high-resistance joints. Heat dissipation is 18 to 24 W, which should be factored into panel thermal calculations, especially in a sealed enclosure.