Soft start with voltage ramp — what it means on the line
The ABB 1SFA896208R7000 (PSRC25) is a soft starter that uses a voltage ramp to bring a motor up to speed gradually. That fixed ramp setting means you don't have to dial in acceleration time on site — the unit applies a pre-set voltage profile each start. It's sized for three-phase motors on 208 to 600 V AC supplies, with a 4x Ie starting capacity for 6 seconds, which covers most standard induction motor starts without tripping upstream protection. The control circuit runs on 24 V DC, while the main control supply accepts 100 to 240 V AC. That split lets you keep the logic side on a low-voltage DC bus while the power section taps line voltage.
The UL/CSA horsepower rating is 7.5 HP at 200-208 V AC three-phase. That's the figure that governs a North American panel — if your motor nameplate says 7.5 HP on a 208 V system, this unit covers it. The broader voltage range (208-600 V AC) means it also works on 480 V and 600 V supplies, but the HP rating scales with voltage; the 7.5 HP at 208 V is the limiting case. ABB recommends pairing this soft starter with an MS132 manual motor starter in the 20-25 A range for overload protection. The soft starter itself has no integrated electronic overload, so that external device is required for motor thermal protection.
Main circuit terminals accept rigid 1 x 0.75 to 2.5 mm² wire; the supply circuit takes the same range. That's typical for a soft starter this size — fits standard panel wiring without needing oversized lugs. That covers most indoor panel conditions; watch for derating if the panel ambient exceeds 40 °C for sustained periods.