Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 150-A240NBD |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Type | Smart Motor Controller / Solid-State Reduced-Voltage Soft Starter |
| Product Series | Bulletin 150 SMC Plus (SMC-2 generation) |
| Catalogue Code Meaning | N = open type enclosure, BD = 200-480 V AC, 3-phase |
| Rated Operational Current | 240 A continuous (standard duty), 192 A heavy duty |
| Motor Power Rating | 200 HP @ 460 V standard duty / 150 HP @ 460 V heavy duty; approx. 132 kW @ 380-415 V |
| Line Voltage | 200-480 V AC, 3-phase, 50/60 Hz (47-63 Hz operating range) |
| Control Voltage | 100-240 V AC, single-phase, 50/60 Hz |
| Control Power Demand | Approx. 30 VA, plus 45 VA for the cooling fan on larger frames |
| Starting Modes | Soft start (voltage ramp), selectable kick start, current limit start, full voltage start |
| Adjustable Parameters | Start ramp 0.5-30 s, initial voltage 0-40%, current limit 150-500% FLC, kick start 0.4-2.0 s, stop ramp 0-60 s |
| Protection Functions | Electronic overload with thermal memory, stall and jam detection, phase loss and unbalance, underload, overtemperature, excessive starts per hour, SCR fault |
| Auxiliary Contacts | 1 normally open + 1 normally closed |
| Transient Protection | 3000 V surge peak, 1500 V showering arc, RC snubber dv/dt network, metal oxide varistors 220-300 J |
| Enclosure | Open type, for installation in a suitable control panel |
| Operating Temperature | 0 °C to +50 °C without derating |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5% to 95%, non-condensing |
| Altitude / Vibration | Up to 2000 m without derating; 2.5 G vibration withstand |
| Approximate Dimensions | 273 × 268 × 560 mm |
| Approximate Weight | 28.5 kg |
| Standards | UL 508, CSA C22.2 No 142, CE, IEC/EN 60947-4-1 and -2 |
| Lifecycle Status | Discontinued by the manufacturer; supported through the surplus and repair market |
Ratings and dimensions shown are those most consistently reported for this catalogue number; confirm against the nameplate of your installed unit, as standard-duty and heavy-duty figures differ.
Main Features and Advantages
Protection that replaces an entire panel section: The Allen-Bradley 150-A240NBD folds soft starting, electronic overload protection with thermal memory, stall and jam detection, phase-loss and unbalance monitoring, underload and overtemperature protection into a single open-type device. In a conventional build those functions require a contactor, a separate overload relay, a phase monitor and the interwiring between them. Here they share one set of current sensors and one logic board, which removes both the components and the wiring errors that come with them.Starting modes matched to the mechanical load: Soft start ramps voltage from a user-set initial torque, kick start adds a selectable voltage boost to break away high-friction loads, and current limit start holds current at a chosen ceiling — as low as 150% of full-load current — where the supply is weak or a generator is running. The Allen-Bradley 150-A240NBD also supports full-voltage starting, letting it act as a solid-state contactor when the process does not actually need ramping.Energy saver and phase rebalance: These two functions address conditions rather than faults. On lightly loaded motors the energy saver reduces applied voltage and cuts magnetising losses, which over a continuous-duty fan or pump is a real reduction in kWh. Phase rebalance trims output voltage per phase to correct current imbalance on an uneven supply, protecting the motor from the extra heating that unbalanced current causes.Survivability on a dirty supply: With 3000 V surge withstand, 1500 V showering-arc protection, RC snubber dv/dt limiting and 220-300 J of MOV clamping across the SCR stack, the Allen-Bradley 150-A240NBD tolerates the line disturbances that destroy unprotected thyristor assemblies.Field-expandable through option kits: A single option may be added — soft stop, pump control, preset slow speed, SMB smart motor braking, Accu-Stop or slow speed with braking. Pump control in particular is valuable, since it shapes both the start and stop ramps to suppress the pressure surges that cause water hammer.
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