ABB 70EB02C-ES High performance thermal overload relay

ABB 70EB02C-ES Overview

The ABB 70EB02C-ES is a compact, high-performance thermal overload relay designed to protect motors and electrical circuits from overloads, phase failures, and imbalances. Part of ABB’s ES Series, this relay is widely used in industrial and commercial applications to ensure safe and reliable operation of motors in HVAC systems, pumps, conveyors, and machinery. Its modular design and compatibility with ABB contactors make it a versatile solution for motor control and protection.

Key Technical Specifications

1. Rated Operational Characteristics
   • Rated Current Range: Adjustable from 0.1 A to 25 A (depending on model configuration).
   • Rated Voltage: Up to 690 V AC (50/60 Hz).
   • Tripping Class: Class 10 (fast tripping for standard motor protection).
2. Protection Features
   • Overload Protection: Automatically disconnects power during sustained overloads.
   • Phase Failure/Imbalance Protection: Detects and responds to phase loss or asymmetry.
   • Ambient Temperature Compensation: Ensures accuracy across operating temperatures.
3. Mechanical & Environmental
   • Mounting: DIN rail compatible for easy installation.
   • Operating Temperature: -25°C to +60°C.
   • Protection Rating: IP20 (enclosure protection).
   • Standards Compliance: Meets IEC/EN 60947-4-1, UL 508, and CE standards.
4. Control & Indication
   • Manual/Auto Reset: Configurable reset mode for flexibility.
   • LED Indicators: Visual status for power, trip, and fault conditions.
   • Test Button: Allows manual testing of relay functionality.
5. Compatibility
   • Designed to pair with ABB ES Series contactors (e.g., A-series or AF-series).
   • Integrates into motor control centers (MCCs) or standalone control panels.

Core Functionalities

1. Motor Protection
   • Prevents motor burnout by monitoring current and disconnecting power during overloads.
   • Reduces downtime and maintenance costs by avoiding motor damage.
2. Adjustable Settings
   • Current Adjustment: Fine-tune the relay to match motor nameplate specifications.
   • Trip Delay: Configurable delay to avoid nuisance tripping during startup.
3. Diagnostic Capabilities
   • Clear fault indication via LEDs simplifies troubleshooting.
   • Phase imbalance detection enhances system reliability.
4. Modular Design
   • Snap-on attachment to contactors saves space and simplifies wiring.
   • Expandable with auxiliary contacts or communication modules (if supported).

Typical Applications

• Industrial Machinery: Protection of motors in conveyor systems, compressors, and pumps.
• HVAC Systems: Safeguarding fans, blowers, and refrigeration units.
• Water Treatment: Motor control in pumps and filtration systems.
• Renewable Energy: Integration into wind or solar power inverters.