ABB 1SDA038324R1 (1SDA038324R) Frame Breaker Motor – 220–250 V AC/DC, 200 W, 4–5 s Charging Time

Technical Specifications

Main Features and Advantages

Spring-charging discipline, not just “a motor”: The ABB 1SDA038324R1​ is purpose-geared for one job—wind the Emax/T8 closing spring to full tension and then get off the power. The 4–5 s charge time on E1–E6 frames is deliberate: wind too fast and you shock the spring and the mechanism latch; wind too slow and the breaker isn’t ready for a re-close after a fault. The gear train inside the ABB 1SDA038324R1​ is ratioed to the spring’s torque curve, which is why a generic 200 W gear motor from a catalogue will not substitute—the commutation timing, the limit-switch cam, and the manual-lever engagement are all integrated into the SACE mechanism cassette.Auto-recharge after every close: The operational logic is what makes the 1SDA038324R1​ feel “invisible” in normal service. Breaker closes → spring dumps its energy through the contacts → limit switch on the motor circuit closes → ABB 1SDA038324R1​ spins up again and re-tensions the spring to ready-state within 5 seconds. This means the breaker is always “one close ready” even if the next close command comes 10 seconds later. When this loop breaks—motor hums but never hits limit, or motor doesn’t restart after close—the “spring not charged” LED on the Emax front fascia lights, and the plant knows the spare call is coming.Microswitch as the remote tell-back: The motor ships with a stored-energy microswitch ganged to the gear cam. When spring is full, the microswitch flips and signals “charged” to the breaker’s auxiliary contact block (usually 1a1b or part of the SOR/UVT auxiliary tree), which then propagates to the DCS/SCADA as a binary status. This is the signal that prevents a remote operator from issuing a close command on a breaker whose spring is still winding—a protection that lives or dies on the ABB 1SDA038324R1​ microswitch being correctly adjusted. During mechanism PM, verifying the microswitch actuation point (should flip ~2–3° before spring full-tense dead centre) is one of the highest-ROI 5-minute checks on an Emax cubicle.Manual override as the safety net: ABB designed the 1SDA038324R1​ gear train to stay engaged with the manual lever on the Emax front. If control power is dead, or the motor has failed mid-shift, the spring can still be wound by hand with the breaker’s standard operating handle—the same handle used for local open/close. This means a failed motor does not make the breaker “unusable”—it just forces manual recharge between operations. For plants that cannot afford a breaker out-of-service window, this is the difference between “order a motor, swap next PM” and “trip the bus and change it now.”Voltage-family spread: The 1SDA038324 root covers multiple voltage suffixes (R1 = commonly 220–250 V AC/DC; other siblings cover 24–30, 48–60, 100–130). The ABB 1SDA038324R1​ (220–250 V) is the most common in industrial switchboards fed from control-Transformer 230 V; 24 V DC versions turn up on marine switchboards and UPS-backed emergency-breaker circuits; 100–130 V shows up on North American 120 V control slices. The gearmotor mechanics are identical—only the armature wind and the commutation are different—so the mechanical swap is the same across the family, but electrically mixing suffixes will let the magic smoke out. Verifying the old motor’s label “1SDA038324R…” last three digits before ordering is the one non-negotiable step.

Application Field

The ABB 1SDA038324R1​ lives inside every SACE Emax (E1–E6) and Tmax T8 where spring-charged closing is used—which is to say, virtually every Emax drawer unit in LV main-switchboards, genus-tie ATS breakers, transformer-incomer 3200–6300 A frames, and heavy-MCC T8 branches (crane feeds, large compressor mains, smelter pot-line feeders). In power-gen balance-of-plant LV rooms, Emax E4/E6 frames on the generator-circuit side routinely carry the ABB 1SDA038324R1​ as the close-spring driver; on marine main switchboards (ABS/DNV classed) the same motor appears on Emax frames fed from 230 V AC control, with the 24 V DC variant occasionally specified for emergency-distribution sections. Data-centre LV switchboards (Emax 2 E1–E2 for ATS tie, E4–E6 for utility/main gen incomer) also use the 1SDA038324R1—here the “spring charged” microswitch status is typically mapped into the BMS so the facility team knows if an ATS-tie breaker is ready for a transfer close.Beyond the obvious LV-switchboard homes, the ABB 1SDA038324R1​ also turns up in:

• Retrofit / mechanism-refurb projects: 15–20-year Emax fleets where the original motor commutator is wearing, brush dust is accumulating, or the gear grease has hardened in hot switchroom ambients. Swapping the 1SDA038324R1​ (plus a mechanism-grease service) is cheaper than a whole breaker and keeps the original draw-out cradle, termination, and cubicle approvals intact.
• Spare-strategy bulk buys: plants running 10+ Emax drawers typically keep 1–2 ABB 1SDA038324R1​ on the critical-spares shelf because the symptom (“spring not charged” alarm, breaker closes once manually then won’t re-close remotely) is unmistakable and the swap is under 30 minutes including cubicle permit. For single-sourced incomer breakers where a failed close capability = bus-transfer fail = load drop, the motor is disproportionately cheap insurance.

One clarification worth making: the user-facing phrase “frame circuit breaker motor” can ambiguously mean “(motor for a) frame circuit breaker” (which is what the ABB 1SDA038324R1​ is) or “motor-circuit-breaker” (MCB/MPCB protecting a motor)—two completely different ABB product lines. The 1SDA038324R1​ is firmly in the first camp: it serves the frame breaker, it does not protect a motor. Keeping that distinction straight avoids ordering the wrong ABB family.