Parker 591C15005301041000 150A Non-Regen DC Drive

Description

Product Introduction

The Eurotherm / Parker SSD 591C/1500/5/3/0/1/0/4/1/00 is a heavy-duty, 2-quadrant non-regenerative digital DC drive. Configured for 150 Amp armature output, this unit manages speed, torque, and field regulation for continuous industrial processing lines.

Unlike analog drives that suffer from potentiometer drift, the 591C utilizes a 16-bit microprocessor to execute precise digital speed loop algorithms. Its integrated field regulator handles fixed-voltage or field-weakening modes, allowing smooth constant-power operation above motor base speeds without requiring external field control hardware.

Key Technical Specifications

Application Scenarios & The “Trench” Experience

Picture this: It’s 1:00 AM on a continuous rubber extrusion line, and the main screw drive trips out on an overcurrent fault. The line cools, material hardens inside the barrel, and every minute of downtime costs $2,000. Diagnostics point to a shorted SCR bridge on an old analog drive board. You don’t have three days to engineer an AC conversion and pull new motor power cables—you need a pre-tested 591C 150A unit that drops straight into the panel, wires up to the existing tachometer, and resumes production.

• Rubber & Plastics Extrusion – Main screw drive speed regulation – Maintains continuous barrel torque without thermal drift.
• Paper & Converting Web Lines – Unwind and draw roller drives – Delivers tight open-loop and closed-loop tension control.
• Wire & Cable Manufacturing – Capstan and payoff reel control – Handles precise velocity matching across acceleration ramps.
• Mixing & Chemical Processing – High-viscosity industrial agitators – Provides dependable current limiting during high-load startup phases.

Field Case Study

A plastics compounding facility in Indiana suffered a catastrophic drive failure on a 75 HP DC extruder when a cooling fan failure overheated the main SCR bridge. The original drive was completely unserviceable. We supplied a bench-tested, refurbished Eurotherm 591C/1500 unit overnight. The site technician mounted the chassis into the original panel footprint, programmed motor nameplate parameters using the front MMI keypad, and ran self-tuning routines. The line was compounding resin again before lunch.

Transparency SOP: Quality Assurance & Testing

We don’t just ship boxes; we test them on actual Parker Eurotherm drive test benches:

1. Inbound Mechanical Check: Inspect heat sink fins, SCR power blocks, ribbon cables, and main terminal busbars for thermal stress.
2. Capacitor & Gate Driver Audit: Test power supply bus capacitors for ESR levels; verify SCR gate firing signals with dual-trace oscilloscopes.
3. Live Rig Power-On: Mount the 591C onto a 500V 3-phase test rack paired with a loaded DC shunt motor.
4. Full Speed & Load Sweeps: Run the drive across 0 to 100% speed ranges using tachometer and armature voltage feedback loops.
5. Field Regulator Sweep: Verify current regulation on the internal field excitation bridge across fixed and field-weakening modes.
6. ESD & Protective Packaging: Clean circuit cards, secure front panel doors, wrap in static-shielding film, and package inside heavy foam boxes.

591C15005301041000

The Veteran’s Tech Trap Guide

• ⚠️ Do NOT Confuse 590C and 591C: The 590C is a 4-quadrant regenerative drive (capable of dynamic braking and reversing), while the 591C is a 2-quadrant non-regenerative drive. If your process requires rapid stopping or overhauling load handling, installing a 591C will result in overvoltage trips during deceleration.
• ❗ Verify the Auxiliary Supply Jumper Settings: Ensure the internal control transformer tap (110V vs 220V AC) matches your control voltage supply before powering up the drive electronics, or you will blow internal power supply fuses.
• ⚠️ Perform an Autotune Before Loading the Motor: Always run the drive’s built-in stationary Current Loop Autotune from the front keypad before running the motor under mechanical load. This tunes internal PI gains to match motor armature inductance, preventing current ring and unstable hunting.
• ❗ Check Tachometer Polarity: If using an analog tachometer for feedback, double-check wire polarity on terminals G3 and G4. Reversed tachometer polarity will cause the motor to runaway instantly upon startup until the drive trips on overspeed.

Frequently Asked Questions

Q: Can I use the Eurotherm 591C/1500 to replace an older 591P (P-Series) drive?

A: Yes. The 591C (C-Series) and 591P (Link-Series/Panther) share identical power stage ratings and mechanical footprints. However, you must verify control wiring terminal assignments and parameter settings during commissioning.

Q: What is the main difference between a 1500 and a 1800 frame rating in the 590/591 series?

A: The “1500” code designates a 150 Amp armature current rating (Frame 3 chassis), whereas higher codes (like 1800) represent larger physical chassis sizes capable of handling higher current outputs.

Q: Does this drive support encoder feedback?

A: Yes. The 591C control card supports standard analog tachometers, armature voltage feedback, or digital optical encoders via an optional Microtach feedback card plugged into the door assembly.

Q: Is this 591C drive capable of reversing motor direction?

A: The 591C power bridge itself is non-regenerative and single-direction. To reverse motor direction with a 591C, you must use external armature reversing contactors or field-reversing control circuits.

Q: What warranty is provided with this component?

A: Every Eurotherm 591C drive—whether New Surplus or bench-tested Refurbished—comes with a full 12-month operational warranty covering power bridges, control boards, and field firing circuits.