Overview
The Allen-Bradley 592-EC1AC is an E3-series solid-state electronic overload relay from Rockwell Automation’s Bulletin 592 product line. This relay provides reliable motor overload protection in compact motor starter applications. With a 1-5A adjustable current range and integrated logic I/O (2 inputs, 1 output), the 592-EC1AC delivers both thermal protection and signal integration for coordinated motor control.
Key Features
- E3 Solid-State Design: Electronic overload detection without bimetallic elements ensures consistent, repeatable trip performance.
- Integrated I/O: 2 inputs and 1 output enable direct signal feedback to motor controllers and starters without external modules.
- Direct Contactor Mount: Mounts directly onto contactors, eliminating external wiring and reducing panel space.
- Adjustable 1-5A Range: Provides flexibility for motors in the fractional- to 5-horsepower range.
- 600V AC Maximum Rating: Suitable for standard three-phase and single-phase industrial motor circuits.
- Manual Reset: Operator-controlled reset minimizes unplanned restarts after thermal events.
Technical Specifications
- Adjustable Current Range: 1–5 A
- Voltage Rating: 600 V AC maximum
- Input Signals: 2 digital/analog inputs
- Output Contacts: 1 relay output
- Mounting Style: Direct contactor mount
- Relay Type: Solid-state electronic
- Series: Bulletin 592, E3 class
- Control Method: Manual reset (operator-initiated)
- Compatible NEMA Sizes: 0–2 contactors
Typical Applications
- Fractional and small horsepower three-phase squirrel-cage induction motors
- Single-phase motors in pump and compressor duty applications
- Machine tool drive motors requiring integrated trip signaling
- Industrial conveyor and material handling motor protection
- HVAC and refrigeration compressor motor control
- General manufacturing motor starter assemblies with overload feedback requirements
Compatibility & Replacements
Compatible With
- Allen-Bradley Bulletin 592 series contactors and motor starters
- NEMA Size 0, 1, and 2 motor starter enclosures
- Standard three-phase and single-phase 480V, 240V, and 120V motor circuits
- Rockwell Automation CompactLogix and ControlLogix systems via discrete input/output signals
- Traditional hardwired motor control circuits and relay logic panels
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering to ensure pinout and mounting match your existing contactor assembly.
Works With
- Hardwired motor control logic and relay panels
- Discrete input modules in Allen-Bradley CompactLogix and ControlLogix platforms
- Thermal protection coordination with motor soft starters and variable frequency drives
- Manual and electromechanical reset solenoid accessories
