Product Overview

150FR4042 is a four-quadrant regenerative digital DC driver from the FlexPak 3000 series of Reliance Electric (now part of ABB/Baldor-Reliance), with a rated power of 150HP (111kW) at 460VAC. It is used for high-performance DC motor speed control and energy feedback applications. It is a discontinued high-end model. Refurbished / second-hand equipment is used for maintenance and replacement in large industrial DC systems.

Model definition

150: 150HP power rating

FR: FlexPak 3000 regenerative (Regenerative)

4042: 460VAC, three-phase, 150HP configuration code Technical Specifications

Input: Three-phase AC, 460VAC ±10% (414–506VAC), 50/60Hz

Output (Armature): 0–500VDC, maximum continuous 210A

Output (Excitation): 0–300VDC, adjustable

Power: 150HP (111kW) @ 460VAC; 75HP (56kW) @ 230VAC

Control mode: Open-loop voltage, closed-loop speed (tachometer/encoder), torque control

Control characteristics: Four-quadrant operation, energy feedback to the grid, linear speed ratio 200:1

Protection: Overcurrent, overvoltage, undervoltage, overheating, short circuit, grounding, demagnetization, overspeed

Communication: Standard RS-232/485; optional Profibus-DP, DeviceNet

Environment: 0–45°C, 5–95% RH (no condensation)

Installation: Floor-standing / Wall-mounted (vertical)

Weight: Approximately 182kg (400lbs)

Interface and Wiring

Power terminals: L1/L2/L3 (three-phase input), A+/A- (armature output), F+/F- (excitation output), PE (ground)

Control terminals: Start/stop, forward/reverse, 0–10VDC/4–20mA speed setting, tachometer/encoder feedback, fault reset, emergency stop

Communication ports: 9-pin RS-232 (PC connection), 25-pin (driver interconnection) Core function

Four-quadrant regeneration: Energy is fed back to the grid during braking, achieving energy conservation and reduced consumption.

High precision speed control: Dual-loop (speed + current) digital control, rotational speed stability of ±0.01%

High torque: 150HP heavy load, strong starting/low-speed torque, suitable for constant-torque loads

Comprehensive protection: Fault self-diagnosis and rapid shutdown, protecting the driver and motor

Parameter programmable: Parameters can be set through the panel or CS3000 software, supporting upload/download

Monitoring display: 6 sets of parameters including load percentage, armature current/voltage, motor speed, etc. Application scenario

Heavy-duty machine tools: Large lathes, milling machines, grinding machines (150HP heavy load)

Metallurgical equipment: Rolling mills, coiling machines, unwinding machines (four-quadrant, tension control)

Lifting machinery: Cranes, winches (high starting torque, energy feedback)

Paper / Printing: Rewinding machines, coating machines (high precision speed control, tension control)

Renovation of old systems: Direct replacement of FlexPak 3000 series with the same power drive

Operation and maintenance Use

Install vertically on a sturdy base, leaving a ≥300mm heat dissipation gap around it.

Connect the power supply, motor and control lines according to the terminal markings, ensuring reliable grounding.

Set the parameters (maximum speed, current limit, excitation current, etc.) through the panel or CS3000 software.

Carry out point operation tests to confirm the motor direction, and then conduct load trial operation.

Avoid continuous overloading and do not exceed the rated current/voltage during operation. Maintenance

Every 3 months: Check for any damage or looseness in the casing, cables, and terminals

Cleaning: After power off, use a dry cloth to wipe off dust. Do not use liquid cleaners.

Annual inspection: Tighten terminals, clean dust from the heat sink, and check the fan operation

Anti-static: The internal components are sensitive to static electricity. Do not open the box without professional grounding. 

Storage: Spare parts should be stored in a cool, dry, and dust-free environment.