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Reliance Electric 20FR4042 460 VAC 20 HP FlexPak 3000 Regenerative Drive



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  • Part Number: 20FR4042
  • SKU: 20FR4042RE
  • Manufacturer: Reliance Electric
  • Series: FlexPak 3000

20FR4042 Technical Specifications

Manufacturer Reliance Electric
Series FlexPak 3000
Part Number 20FR4042
HP 20 HP
Input Voltage 460 VAC
Hz 50/60Hz

Product Description

The 20FR4042 is a 3-Phase Reliance Electric FlexPak 3000 DC Drive.

The 20FR4042 is a 20HP 460 VAC 50/60Hz Regenerative drive. It has a rated field current of 10 amps, a DC armature current of 35 amps, and an RMS AC line current of 31 amps. This drive has semiconductor fuse protection and a phase-insensitive AC line input. It has the ability to burst fire the SCRs. It can achieve a 150% full-load current for I minute and then sustain a 200% load current for 5 seconds. The user has the ability to adjust the max and minimum speed of the motor. This drive has 12-bit analog and digital signals. It is capable of self-tuning the speed and current loops without needing to disconnect the actual fields. With that, it has a field loss protection. The user has the means to choose between three stop-modes that include coasting, ramping, and current limiting. These modes can be chosen using the user interface (keypad).

The 20FR4042 uses a keypad that is capable of many functions. It can allow the user to choose a Quick-Start sequence that can allow for a speedy drive setup. It can allow the user to change the display language between five different options. The keypad has status indicators that include LEDs and alarms. It is also capable of performing in-depth system diagnostics.

The 20FR4042 is in a standard chassis type enclosure. There are kits that are sold separately that can allow this chassis to be upgraded to a NEMA rated enclosure. It is 270.5 mm wide, 477.3 mm tall, and 310.6 mm thick. It weighs about 26.4 kg.

Frequently Asked Questions about 20FR4042

What are the output and DC field ratings on a Reliance FlexPak 3000 20FR4042?
The output on a 20FR4042 is 240/500 VDC and the DC field on the 20FR4042 is 150/300 VDC.
What does switching between jog speeds do to a FlexPak 3000 20FR4042 drive?
When you switch the jog speeds on a 20FR4042 drive, the 20FR4042 either accelerates or decelerates to the new jog speed. For more information on jog sequencing on a 20FR4042, see section 2.1 of the FlexPak 3000 DC Drive Instruction Manual. 
What is current compounding used for on a 20FR4042 drive?
On the 20FR4042 drive, current compounding is used for load sharing between drives. Current compounding often changes the speed reference on a 20FR4042 if there is a change in CML feedback. The current compounding parameters on a 20FR4042 are P.209 and P.293.
What is the short circuit rating on the 20FR4042 FlexPak 3000 drive?
The Reliance Electric FlexPak 3000 20FR4042 drive has a 500A short circuit rating.

Repair Services For 20FR4042

Type Lead Time Price Action
Repair Service 1-2 weeks $4716

Our highly skilled technicians can repair your 20FR4042. All of our repairs come with a 3 Year AX Control Warranty. Please contact us for additional information about our repair process. To receive the repair pricing and lead time listed above please process your repair order via our website. The following repair options may be available upon request:

  • 48-72hr Rush Repair
  • Detailed Repair Reports
  • AX Control Certificate of Warranty

AX Control Warranty Info

All products we sell are backed by our unparalleled warranty. A warranty certificate will be provided with your order upon request.
All PLCs, HMIs, and Turbine Control Boards: 3 Years
All AC/DC and Servo Drives: 2 Years
All Motors: 1 Year
Learn More