Phoenix ELR Series: Electronic Overload Relays - Selection Guide
Product Overview
The Phoenix ELR Series consists of high-precision electronic overload relays designed for motor and load protection in industrial automation. Covering single-phase/three-phase configurations, diverse control voltages (24V DC, 230V AC), and wide load voltage ranges (400V/500V/600V AC), these relays provide reliable protection against overload, phase failure, and locked rotor conditions. With adjustable current ratings (2A~50A), fast response times, and DIN rail mounting, they’re ideal for safeguarding motors, pumps, conveyors, and other industrial loads in manufacturing, process control, and power distribution scenarios.
Model Quick Reference Table
| Model No. | Product Name | Control Voltage | Load Voltage | Rated Current | Core Features | Application Scenarios |
|---|---|---|---|---|---|---|
| 1291655 | ELR DCR-PT-24DC-10 | 24V DC | - | 10A | PT-compatible, DC control | PT-signal integrated motor overload protection |
| 2297235 | ELR 3-24DC/500AC-16 | 24V DC | 500V AC | 16A | 3-phase protection, high load voltage | Three-phase motor protection (500V AC systems) |
| 2297206 | ELR 3-230AC/500AC-2 | 230V AC | 500V AC | 2A | 3-phase, low current | Small three-phase motor overload protection |
| 2941714 | ELR 3/9-500 | Universal | 500V AC | 3~9A (adjustable) | 3-phase adjustable current | Medium three-phase motor variable load protection |
| 2941701 | ELR 3/9-400 | Universal | 400V AC | 3~9A (adjustable) | 3-phase, 400V AC 适配 | Standard three-phase 400V AC motor protection |
| 1032926 | ELR 1-SC-24DC/600AC-50 | 24V DC | 600V AC | 50A | 1-phase, SC interface, high current | Large single-phase motor protection (600V AC, 50A) |
| 1032921 | ELR 1-SC-24DC/600AC-30 | 24V DC | 600V AC | 30A | 1-phase, SC interface | Medium single-phase motor protection |
| 1032919 | ELR 1-SC-24DC/600AC-20 | 24V DC | 600V AC | 20A | 1-phase, SC interface | Small-to-medium single-phase motor protection |
| 1032927 | ELR 1-SC-230AC/600AC-50 | 230V AC | 600V AC | 50A | 1-phase, SC interface, high current | Heavy-duty single-phase motor protection |
| 1032922 | ELR 1-SC-230AC/600AC-30 | 230V AC | 600V AC | 30A | 1-phase, SC interface | Medium single-phase motor protection (AC control) |
| 1032920 | ELR 1-SC-230AC/600AC-20 | 230V AC | 600V AC | 20A | 1-phase, SC interface | Standard single-phase motor protection |
| 2297170 | ELR 1-24DC/600AC-50 | 24V DC | 600V AC | 50A | 1-phase, high current | Large single-phase motor overload protection (DC control) |
| 2297141 | ELR 1-230AC/600AC-20 | 230V AC | 600V AC | 20A | 1-phase, AC control | Basic single-phase motor protection |
| 2297154 | ELR 1-24DC/600AC-30 | 24V DC | 600V AC | 30A | 1-phase, DC control | Medium single-phase motor protection (DC control) |
| 2297138 | ELR 1-24DC/600AC-20 | 24V DC | 600V AC | 20A | 1-phase, DC control | Small single-phase motor protection (DC control) |
Core Technical Specifications (Universal)
| Parameter | Value | Notes |
|---|---|---|
| Protection Functions | Overload, phase failure (3-phase models), locked rotor | Comprehensive motor protection |
| Control Voltage Range | 24V DC (20.4~28.8V); 230V AC (198~253V) | Industrial standard control voltages |
| Load Voltage Range | 400V AC / 500V AC / 600V AC | Model-dependent, matches global power grids |
| Current Adjustment Range | Fixed (2A/10A/16A/20A/30A/50A) or adjustable (3~9A) | Covers small to large motors |
| Trip Time | Class 10 (typical) | Complies with IEC 60947-4-1 standards |
| Operating Temperature | -25℃~70℃ | Adapts to harsh industrial environments |
| Mounting Type | 35mm DIN rail (NS 35/7.5) | Compact design, space-saving |
| Connection Type | Screw terminals / SC interface (SC models) | Secure wiring, SC interface for quick integration |
| Protection Class | IP20 (cabinet mounting) | Dust-proof, suitable for control cabinets |
| Certifications | CE, UL, CSA, IEC 60947-4-1 | Global industrial compliance |
| Reset Type | Manual / Automatic (select models) | Flexible maintenance options |
Application Scenarios & Recommended Models
1. Three-Phase Motor Protection
-
Requirement: 400V AC three-phase motor, adjustable current (3~9A)
-
Recommended Model: 2941701 (ELR 3/9-400)
-
Key Reason: Adjustable current range fits variable loads; 400V AC compatibility for standard industrial motors
-
Requirement: 500V AC high-voltage three-phase motor, 16A current
-
Recommended Model: 2297235 (ELR 3-24DC/500AC-16)
-
Key Reason: 500V AC load voltage tolerance; 24V DC control for PLC integration
2. Single-Phase Motor Protection (High Current)
- Requirement: 600V AC single-phase motor, 50A heavy load
- Recommended Models: 1032926 (24DC/SC), 1032927 (230AC/SC)
- Key Reason: 50A high current rating; 600V AC high-voltage compatibility; SC interface for system integration
3. Small-to-Medium Single-Phase Motor Protection
- Requirement: 20A/30A single-phase motor, DC control
- Recommended Models: 2297138 (20A), 2297154 (30A)
- Key Reason: Fixed current rating, simple installation, 24V DC control for automation systems
4. PT-Signal Integrated Protection
- Requirement: Motor protection with PT signal integration
- Recommended Model: 1291655 (ELR DCR-PT-24DC-10)
- Key Reason: PT-compatible design, integrates with potential transformer signals for enhanced monitoring
Core Advantages
- Comprehensive Protection: Covers overload, phase failure, and locked rotor to extend motor lifespan
- Wide Voltage/Current Compatibility: Supports 400V/500V/600V AC loads and 2A~50A currents for diverse motors
- Dual Control Options: 24V DC (PLC-compatible) and 230V AC (direct AC control) fit different systems
- Easy Installation: DIN rail mounting and secure screw/SC connections simplify deployment
- Industrial-Grade Reliability: Wide operating temperature range and IP20 protection resist harsh environments
- Global Compliance: IEC/UL/CSA certifications enable international deployment
Installation & Usage Notes
- Voltage Matching: Ensure control voltage matches the module’s rating (24V DC vs. 230V AC) to avoid damage
- Current Selection: Choose a relay with rated current ≥ motor’s full-load current (add 10% margin)
- Phase Matching: Use 3-phase models for three-phase motors (phase failure protection included); 1-phase models for single-phase motors
- Wiring Specifications: Use appropriately sized cables (≥1.5mm² for 20A; ≥4mm² for 50A) to prevent overheating
- Reset Operation: After overload trip, allow motor to cool before resetting (manual reset recommended for troubleshooting)
- SC Interface Setup: For SC models, ensure SC interface compatibility with the control system before integration
- Mounting Spacing: Reserve ≥5mm between relays for heat dissipation, especially in high-current applications
Phoenix ELR Series: Electronic Overload Relays - Selection Guide
Created on：2025-11-19 11:41
