Overview
The Reliance Electric 0-51831-1 is a CVTB (Current Voltage Transductor) printed circuit board engineered for Reliance power drive systems. This control board serves as a magnetic amplifier for reactive power compensation, providing reliable signal conditioning and feedback within legacy Reliance electric drive architectures. The board features a front-mounted faceplate with screw connections and a labeled terminal strip for straightforward integration into Reliance control cabinets.
Key Features
- CVTB current and voltage transduction for Reliance drive systems
- Magnetic amplifier design for reactive power compensation
- Front faceplate with four-point screw attachment interface
- Terminal strip with individually labeled pins for clear wiring
- Rear connector interface for card-slot mounting
- Onboard components: transformers, potentiometers, capacitors, resistors, transistors, and diodes
Technical Specifications
| Part Number | 0-51831-1 |
| Manufacturer | Reliance Electric |
| Product Type | CVTB Control Board (Printed Circuit Board) |
| Function | Current Voltage Transductor / Magnetic Amplifier |
| Application | Reactive Power Compensation |
| Mounting | Card slot with rear connector interface |
| Interface | Terminal strip with labeled pin connections |
| Faceplate | Front-mounted with four screw connection points |
| Board Status | Used, fully inspected |
| Series | Reliance Electric 0-51831 Drive Board Series |
Typical Applications
- Reliance Electric drive control systems requiring reactive power compensation
- Legacy industrial automation systems using Reliance transductor boards
- Power factor correction in DC motor control circuits
- Signal conditioning for motor current and voltage feedback
- Magnetic amplifier circuits in older industrial drive architectures
Compatibility & Replacements
Compatible With
- Reliance Electric drive systems and control cabinets
- Legacy Reliance power systems requiring CVTB signal conditioning
- Industrial applications using reactive power compensation
- Systems designed for card-slot PCB mounting with rear connectors
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The 0-51831-1 is part of the Reliance 0-51831 board series; other variants in the series (0-51831-3, 0-51831-6, 0-51831-7, 0-51831-8) perform different functions and are not direct replacements.
Works With
- Reliance Electric motor drive systems
- Legacy Reliance automation control networks
- Industrial power systems using CVTB transductor boards
- Custom signal conditioning and feedback circuits






