Phoenix ELR H5 Series: Industrial Circuit Protection Devices - Selection Guide

Product Overview

The Phoenix ELR H5 Series consists of advanced circuit protection devices combining motor starter and protection functions in a single compact module. Designed for industrial automation, these hybrid motor starters provide comprehensive protection for three-phase AC motors while enabling reversing control. With 24V DC control voltage and 500V AC load capacity, they support various current ratings (0.6A~9A) and feature integrated emergency stop functionality (up to SIL 3/PL e). The series offers multiple protection variants and connection options, making them ideal for control cabinets, machinery, and production lines requiring reliable motor protection and control.

Model Quick Reference Table

1. Basic Protection Series (I)

2. Enhanced Protection Series (IS/IES)

3. Thermal Protection Series (PT)

4. Special Function Variants

Core Technical Specifications (Universal)

Protection Function Comparison

Application Scenarios & Recommended Models

1. General Industrial Motor Protection

• Requirement: 3-phase motor protection, 2.4A load current, standard control
• Recommended: 2900414 (ELR H5-IES-SC-24DC/500AC-2)
• Why: Balances protection features with cost-effectiveness, screw terminal connection

2. Safety-Critical Machinery

• Requirement: Emergency stop functionality, overload protection, 9A capacity
• Recommended: 2908697 (ELR H5-IS-SC-24DC/500AC-9-P)
• Why: Push-in connections for quick installation, comprehensive safety features, surge protection

3. Precise Equipment with Thermal Sensitivity

• Requirement: Adjustable thermal protection, 0.6A capacity, frequent operation
• Recommended: 2903908 (ELR H5-I-PT-24DC/500AC-0.6)
• Why: Thermal protection prevents damage from overheating during continuous operation

4. Heavy-Duty Industrial Applications

• Requirement: 9A load capacity, robust construction, reliable protection
• Recommended: 2900538 (ELR H5-SC-24DC/500AC-9) or 2903912 (ELR H5-I-PT-24DC/500AC-9)
• Why: High-current capability, industrial-grade components for harsh environments

Core Advantages

1. Single Module Integration: Combines motor starter, overload protection, and emergency stop in one compact device (22.5mm width)

2. Dual Connection Options:

   • Push-in variants (-P): Tool-free wiring, 50% installation time
   • Screw terminal variants: Secure connection for permanent installations

3. Comprehensive Protection Suite:

   • Short-circuit protection (100~45A trip threshold)
   • Thermal overload protection (adjustable per motor requirements)
   • Emergency stop with SIL 3/PL e safety integrity
   • Surge protection against voltage transients

4. Space Optimization: DIN rail mounting with narrow profile minimizes cabinet space usage

5. Reliability:

   • MTBF > 100,000 hours
   • Mechanical life: 3×10⁶ operations
   • Electrical life: 1×10⁵ operations at full load

Installation & Usage Notes

1. Wiring Guidelines:

   • Control circuit: 0.14~2.5mm² conductors
   • Load circuit: 2.5~10mm² conductors (depending on current rating)
   • Separate safety wiring from power circuits

2. Mounting Considerations:

   • Leave 5mm between modules for heat dissipation
   • Install in vertical position for optimal cooling
   • Ensure proper grounding of the DIN rail

3. Protection Setting:

   • For thermal protection variants: Adjust trip current to 1.1×motor rated current
   • Emergency stop circuit: Connect to a normally closed safety switch

4. Maintenance Tips:

   • Visual status check: Green=normal, yellow=warning, red=alarm
   • For -P variants: push-in connections for security
   • Replace damaged modules immediately; do not attempt repair