Frequently Asked Questions
What is Allen-Bradley 150-C108NBD?
Allen-Bradley 150-C108NBD is a Bulletin 150-C SMC-3 solid-state smart motor controller rated at 108 A, designed for compatible three-phase induction motors with a nominal 480 VAC main power circuit and 100-240 VAC control supply.
What is the rated current of 150-C108NBD?
The controller has a 108 A current rating. Rockwell Automation specifies a line-connected motor current range of 27-108 A for supported 380/400/415/460 VAC applications.
What control voltage does 150-C108NBD require?
This model uses 100-240 VAC control power. The manufacturer's specified control current during starting with the fan operating is 200 mA at 120 VAC or 120 mA at 240 VAC.
What is the difference between 150-C108NBD and 150-C108NBR?
The 150-C108NBD uses a 100-240 VAC control supply, while the 150-C108NBR uses 24 V AC/DC control power. These configurations must not be interchanged without checking the control supply and fan power requirements.
What motor horsepower range does 150-C108NBD support?
Manufacturer selection data identifies a 50-75 HP range for line-connected motors at 460 VAC. Motor full-load current, starting duty and installation requirements must also be considered.
Does 150-C108NBD support inside-delta motor connections?
Yes. Rockwell Automation specifies an inside-delta motor current range of 47-187 A for compatible 380/400/415/460 VAC installations. Wiring and protective device selection must follow the installation instructions.
Does 150-C108NBD include an internal bypass?
Yes. The controller includes an integrated bypass to reduce power losses and heat generation during the applicable full-speed motor running condition.
What starting current limits are available?
The selectable current limits are 150%, 250%, 350% and 450% of motor full-load current. The controller also provides configurable starting times, initial torque and kick-start settings.
Does 150-C108NBD include electronic motor overload protection?
Yes. Integrated motor overload protection supports Class 10, 15 and 20 trip settings. The selected protection settings must be appropriate for the connected motor and operating duty.
Can 150-C108NBD perform soft stopping?
Yes. Soft stopping can be disabled or configured to 100%, 200% or 300% of the selected starting time when the starter is properly wired and configured.
Does 150-C108NBD have an integrated display or fault contact?
The controller does not include an integrated display. It provides one normally open overload/fault auxiliary contact at terminals 97-98, with operational ratings of 0.6 A at 120 VAC or 0.3 A at 240 VAC.
What should be checked before ordering 150-C108NBD?
Verify the exact catalog number 150-C108NBD, 108 A controller rating, nominal 480 VAC three-phase main supply, 100-240 VAC control voltage, motor full-load current, line or inside-delta wiring, overload trip class, starting duty, fan power requirements, fault contact connections, protective devices, IP2X construction and 443.7 × 196.4 × 205.2 mm installation dimensions.