Allen-Bradley 150-F251NBR SMC Flex High-Power Smart Motor Controller

Command heavy-duty motors with intelligence and finesse. The Allen-Bradley 150-F251NBR is a powerful 251-amp smart motor controller designed for motors up to 200 HP. More than just a soft starter, it offers advanced control modes, integrated metering, and comprehensive diagnostics to optimize performance and protect your valuable equipment.

Why Invest in This Advanced Controller:

• Handles Demanding Loads: Controls large motors up to 251 Amps and 200 HP for heavy industrial applications.
• Multiple Control Strategies: Choose from Soft Start, Current Limit, Linear Ramp, and more for perfect application fit.
• Built-in Power Meter: Monitors amps, volts, kWh, power factor, and motor thermal usage for energy management.
• Complete Motor Safeguard: Integrates overload, stall, jam, and electrical fault protection in one unit.
• Ready for Networks: DPI ports allow connection to HMIs and communication adapters (DeviceNet, Ethernet/IP).

Detailed Technical Specifications

Manufacturer: Allen-Bradley (Rockwell Automation)

Series: SMC-Flex Smart Motor Controller

Model: 150-F251NBR

Rated Current: 251 Amperes

Horsepower Rating: 200 HP @ 460V AC

Input Voltage: 200-460V AC, 3-Phase, 50/60 Hz

Control Voltage: 24V AC or DC

Enclosure: Open Type (Panel Mount Required)

Key Operating Modes: Soft Start, Current Limit, Dual Ramp, Full Voltage, Linear Accel/Decel, Preset Slow Speed, Soft Stop

Programmable Contacts: 4 Fully-Configurable Auxiliary Contacts

Metering Functions: Amps, Volts, kW, kWh, Power Factor, Motor Thermal Capacity, Elapsed Time

Communication Ports: 2 x DPI Ports (for HMI & Network Adapters)

Motor Compatibility: Standard Squirrel Cage or 6-Lead Wye-Delta Motors

Protection Suite: Electronic Overload, Stall/Jam, Phase Reversal, Voltage Unbalance, Under/Over Voltage, Thermal

Product Weight: 30.02 kg (66.19 lbs)

Installation & System Integration

Mount the 150-F251NBR in a robust industrial panel with adequate cooling clearance. Install a properly sized line-side circuit breaker. Connect the 3-phase power and motor leads. Supply 24V AC/DC control power. Configure the motor FLA and desired operating mode via the front interface. For system integration, connect Allen-Bradley communication adapters (e.g., for Ethernet/IP) to the DPI port to enable network control and monitoring.

Warranty Information

This Allen-Bradley product is sold with a full 12-month warranty against defects in materials and manufacturing.

Expert Application FAQs

What's the advantage of "Linear Acceleration" mode?

It provides a perfectly linear ramp from zero to full speed (with optional tach feedback), essential for tension-controlled web processes or precise conveyor positioning.

How does the integrated metering help with maintenance?

By monitoring motor thermal capacity usage and energy consumption (kWh), you can schedule maintenance proactively and identify inefficient operation.

Can I use the auxiliary contacts for a backup alarm system?

Yes. You can program one contact to close on any fault, providing a hardwired signal to a plant alarm horn or light independent of the network.

What size enclosure is needed for this controller?

Due to its size and heat dissipation, consult the installation manual for exact dimensions and clearances. A large, well-ventilated NEMA 12 or 4X enclosure is typically required.

Is it suitable for high-inertia loads like crushers?

Yes, its high current rating and "Current Limit" mode are well-suited for such applications. Ensure the motor's locked-rotor current is within the controller's capability.

Shipping & Delivery
This unit is in stock. We ship promptly via FedEx, UPS, or DHL, providing full tracking information for your logistics planning.

© 2025 Ubest Automation Limited. All rights reserved.
Original Source: https://www.ubestplc.com/
Contact: sales@ubestplc.com Phone: +86 180 3000 5825