Allen‑Bradley 150‑F201NBD SMC‑Flex Soft Starter Product Description

Overview

Allen‑Bradley 150‑F201NBD is a SMC‑Flex series intelligent 电机软启动器（智能电机控制器）from Rockwell Automation. This AB soft starter is open‑frame type, rated 201 A, suitable for three‑phase asynchronous motor soft start and soft stop control, built‑in bypass contactor. 150‑F201NBD is widely used for pump, fan and compressor cabinet transformation, water hammer suppression and spare‑part replacement of SMC‑Flex soft start systems.

Features

Allen‑Bradley 150‑F201NBD adopts three‑phase thyristor regulation scheme with integrated bypass contactor; after startup, the bypass contactor closes to bypass the SCR, reducing heat generation. This AB soft starter has a built‑in LCD and keypad for local parameter setting, status viewing and fault diagnosis. 150‑F201NBD supports multiple starting modes: voltage ramp, current limit, pump control, kickstart for heavy stuck load. It integrates comprehensive motor protection: overload, overcurrent, phase loss, phase imbalance, over/under voltage, SCR fault and PTC thermal protection. The soft starter supports Modbus communication for PLC/SCADA interconnection, and provides configurable relay alarm and status output.

Specs

• Brand: Allen‑Bradley (Rockwell Automation)

• Series: SMC‑Flex Bulletin 150

• Model: 150‑F201NBD

• Rated current: 201 A

• Power rating (460 V): 75～150 HP

• Main circuit voltage: 200–480 V AC, 50/60 Hz

• Control supply: 100–240 V AC

• Structure: Open type, IP00

• Bypass: Built‑in bypass contactor

• Display: LCD + keypad

• Communication: Modbus

• Protection: Electronic overload, phase loss, phase imbalance, SCR fault, PTC

• Mounting: Cabinet base mounting

• Standard: IEC, UL

Principle

Allen‑Bradley 150‑F201NBD adjusts the conduction angle of three‑phase thyristors to slowly raise the motor terminal voltage, limiting starting current and mechanical impact. When the motor approaches full speed, the internal bypass contactor closes, the thyristor stops working and the motor runs directly on the power grid. During shutdown, the unit can execute soft stop curve to reduce water hammer on pump pipelines. The internal sampling circuit continuously monitors current and voltage; once exceeding the protection threshold, it stops triggering and outputs fault signals.

Applications

Allen‑Bradley 150‑F201NBD is deployed in water supply pumps, centrifugal fans, oil and gas compressors, cooling tower loads and sewage treatment equipment. This AB soft starter is used to reduce starting impact and pipeline water hammer. 150‑F201NBD fits equipment maintenance and spare replacement of SMC‑Flex series soft starters.

Installation & Maintenance Notes

Follow official Allen‑Bradley 150‑UM008 SMC‑Flex hardware manual during installation of 150‑F201NBD. Confirm main circuit and control power supply before power‑on; strictly discharge after power failure. Set starting ramp time, current limit and protection class after replacement. Back up soft starter parameters before replacement. Regularly check thyristor heat sink cleanliness, fan condition and terminal tightness. Confirm exact part number 150‑F201NBD before spare‑part swap‑out to verify current rating, control voltage and communication function compatibility.