Q: What is the Allen-Bradley 150-F251NBD?
A: The 150-F251NBD is a heavy-duty solid-state SMC Flex Smart Motor Controller manufactured by Allen-Bradley / Rockwell Automation. It is rated for 251A continuous current with integrated bypass contactor and backlit LCD display.
Q: What are the electrical specifications of the 150-F251NBD?
A: The controller delivers 100–200 HP at 460V AC (132 kW at 400V), operating on 200–480V AC (also rated to 575V), 3-phase, 50/60 Hz with 100–240V AC control voltage. In delta-connected configuration it can handle up to 435A and 400 HP at 575V AC. Steady-state heat dissipation is 198W.
Q: What are the physical dimensions and weight of the 150-F251NBD?
A: The unit measures 560 × 225 × 253.8 mm (22.05 × 8.86 × 9.99 in) and weighs approximately 30.4 kg. It features open type enclosure with IP2X protection when terminal covers are installed.
Q: What start/stop modes does the 150-F251NBD support?
A: The controller supports 9 modes: Soft Start, Full Voltage Start, Current Limit Start, Dual Ramp Start, Kickstart, Pump Start, Linear Speed Acceleration, Preset Slow Speed, Soft Stop, and Pump Stop. Braking options include SMB Smart Motor Braking, Accu-Stop, Slow Speed with Braking, and Coast-to-rest.
Q: What protection features does the 150-F251NBD include?
A: Protection includes electronic overload (Classes 10/15/20/30), phase loss/imbalance, undervoltage, overvoltage, stall, jam, open gate, underload, overtemperature, communication fault, phase reversal, ground fault, and excessive starts/hour protection.
Q: What certifications does the 150-F251NBD hold?
A: The 150-F251NBD is certified to UL, CSA, CE, CCC, EAC, RCM, UKCA, and KC standards.
