1. Brand & Model

• Brand: Reliance Electric (now ABB/Baldor)

• Model: 0-52828-1

• Alias: ICRA Board, Isolated Current Regulator Assembly, Drive Control Card

2. Category

• Category: Industrial Automation Control Board

• Subcategory: Isolated Current Regulator (ICRA) Card, Drive System Control Board

3. Basic Information

• Manufacturer: Reliance Electric, USA

• Status: Obsolete (discontinued), only refurbished/used/surplus units available

• Structure: Single PCB with faceplate, 2 front-panel set screws, edge connector for backplane

• Marking: Silkscreen "ICRA" and part number; grid pattern for component reference

4. Function & Positioning

• Core Function:

  • Precision isolated current regulation for AC/DC drives

  • Electrical isolation between control and power stages

  • Current limiting & fault protection

  • Closed-loop current control with high noise immunity

• Positioning: Isolated current control component for Reliance high-power drive systems, designed for electrical noise isolation in heavy industrial environments

5. Core Specifications

• Power Supply: 115 VAC, ± auxiliary power

• Isolation: High-voltage isolation between control and power circuits

• Controls: Front-panel potentiometers for Gain and Balance adjustment

• Indicators: LED status lights for Power, Fault, and Current Limit

• Interface: Edge connector (conductive tabs) for backplane mounting

• Environment: Industrial-grade, ruggedized for harsh conditions

• Mounting: Standard industrial rack (2 faceplate screws)

6. Compatible Accessories

• Rack: Reliance standard drive racks (e.g., Maxpak, GV3000 series)

• Backplane: Matching edge-connector backplane

• Cabling: Shielded signal cables, 115 VAC power wiring

• Replacement: Compatible ABB/Baldor equivalent isolated current regulator cards

7. Applications

• Industrial Drives: Reliance Maxpak DC drives, GV3000 AC drives

• Metallurgy: Rolling mills, coilers, uncoilers

• Material Handling: Conveyors, cranes, hoists

• Process Industry: Paper mills, mining, heavy machinery, extruders