Allen-Bradley 150-F108NBRB SMC Flex Smart Motor Controller for Pump Control

Product Overview

When a pumping station experiences water hammer due to abrupt motor starts, the Allen-Bradley 150-F108NBRB SMC Flex Smart Motor Controller provides a smooth, controlled acceleration that protects pipes and valves. This soft starter is designed for single-direction motor control with an internal bypass, ensuring efficient operation and reduced thermal stress.

Technical Specifications Breakdown

The 150-F108NBRB handles a controller rating of 108 A and supports motors from 20 to 75 Hp at 460 V AC. It offers trip classes 10, 15, 20, and 30, with a trip current rating of 117% of motor FLC. The input OFF-state current is less than 10 mA AC and less than 3 mA DC, while the auxiliary contacts are rated at AC/DC 5 A. Status indication includes stopped, starting, stopping, at speed, alarm, and fault. The operating temperature range is -5 to 50 °C (23 to 122 °F) for open-type enclosures.

Industry Applications

This controller excels in water and wastewater treatment plants where pump control is critical. Its pump control option minimizes pressure surges and extends pump life. In HVAC systems, the soft start reduces mechanical wear on fans and compressors. The 150-F108NBRB also suits conveyor systems requiring gradual torque buildup.

Installation & Setup Guidance

Mount the open-type controller in a clean, ventilated enclosure with IP2X terminal covers. Use M10 x 1.5 diameter holes for power connections and M3 screw clamp yoke connections for control wiring. Verify line voltage matches the rated operational voltage of 200 to 480 V AC. Ensure the supply transformer provides 75 VA at 100 to 240 V AC.

Maintenance & Reliability

Periodically inspect the heatsink hockey puck thyristor modules for dust buildup. Check the metal oxide varistors (220 J optional) for signs of stress. The controller dissipates 91 W steady-state heat, so maintain adequate airflow. Operate within the specified altitude of 2000 m and pollution degree 2 environment.

Selection Guide & Purchasing Advice

Before ordering, confirm your motor’s full-load current and connection type (line or delta). The 150-F108NBRB supports line-connected motors from 27 to 108 A and delta-connected motors from 47 to 187 A. For complete technical specifications, please contact BluePLC Industrial.