ABB REX010 Earth Fault Protection Unit

Description

ABB REX010 is a dedicated earth fault protection relay used in electrical distribution networks. It safeguards against ground faults by detecting abnormal neutral currents and initiating rapid disconnection. This ensures system reliability, personnel safety, and protection of critical assets in industrial and utility environments.

Specifications

• Model: REX010 HESG324426R0001
• Function: Earth fault protection unit (EFPU)
• Power supply: 36–312 V DC (auxiliary input from station batteries)
• Nominal voltage handling: Up to 277/480 V AC, DC input/output up to 3200 V
• Frequency range: 50/60 Hz
• Current range: 5 A to 2000 A
• Accuracy: ±2% for earth fault resistance measurement
• Environmental rating: IP65 dust and water protection
• Application: Medium- and high-voltage distribution systems, industrial machinery protection
  

Features

• Earth fault detection: Continuous monitoring of neutral currents for early fault identification
• Rapid disconnection: Fast trip response to minimize equipment damage and fire risk
• Wide input range: Supports both AC and DC voltage environments
• High accuracy: ±2% measurement precision for reliable fault resistance detection
• Robust design: IP65-rated housing for harsh industrial conditions
• Flexible integration: Compatible with ABB protection systems and industrial automation setups
• Safety assurance: Enhances operational safety by preventing electrical hazards