Description
Application Scenarios
A large municipal pumping station on the U.S. East Coast had relied on open-transition autotransformer starters for five 125 HP vertical turbine pumps drawing raw water from an intake canal. Every start produced a visible voltage sag on the plant’s distribution bus, tripped sensitive instrumentation, and put mechanical shock on pump shafts and check valves that led to recurring seal failures roughly every eight months. When maintenance planners converted two of the five pumps to the 150-A240NBD, the inrush profile dropped from 6× FLA to a programmable 350% limit, the voltage sag on the 480 V bus disappeared from the power-quality log, and pump seal life stretched to nearly three years.
The 150-A240NBD addresses three chronic pain points in industrial motor starting: the mechanical and electrical stress of across-the-line (DOL) starting on large three-phase motors, the limited adjustability of legacy reduced-voltage hardware such as autotransformer and star-delta starters, and the maintenance burden of contactor tip wear in high-cycle applications. Wherever belts, couplings, and process equipment are punished by sudden torque application — pumps, fans, compressors, conveyors, crushers, mixers — the 150-A240NBD lets engineers tune the start precisely to the load.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 150-A240NBD |
| Manufacturer | Rockwell Automation / Allen-Bradley (Bulletin 150, SMC Plus series) |
| Product Category | Smart Motor Controller / Solid-State Soft Starter |
| Rated Output Current | 240 A continuous — sized for 150 HP motors at 460 VAC |
| Main Circuit Voltage | 200-460 VAC, 3-phase, 50/60 Hz — covers standard North American and IEC voltage classes |
| Control Module Voltage | 100-240 VAC, 1-phase — isolates logic from the power stage |
| Starting Modes | Soft Start, Current Limit, Full Voltage (solid-state contactor) — selectable per application |
| Acceleration Ramp Time | 0 to 30 seconds — tunable to match load inertia |
| Current Limit Range | 25% to 550% of full-load amps — protects weak supply sources |
| Stopping Modes | Soft Stop, Coast to Rest, Pump Control — eliminates water hammer on pump lines |
| Protection Functions | Integrated overload, phase loss, shorted SCR, stall detection — pre-start and run-time |
| Power Device | 6 SCRs (2 per phase), phase-controlled — no contactor tip wear |
| Enclosure / Mounting | Open-type panel-mount chassis, NEMA 1/12 suitable when installed in a listed enclosure |
