ABB REX010 – Product Description

Overview

The ABB REX010 is a specialized Earth Fault Protection Unit designed to safeguard generators, stators, and other electrical equipment from ground faults. It operates seamlessly in medium- and high-voltage applications, providing reliable protection across all generator states.

Moreover, the unit works in conjunction with ABB’s REG216 and REG316 protection relays, ensuring 100% stator and rotor ground fault coverage. Therefore, it delivers enhanced system safety during generator startup, operation, and static conditions. In addition, its compact and robust design allows easy installation in demanding industrial environments such as power plants and petrochemical facilities.

Technical Specifications

Model: REX010
Type: Earth Fault Protection Unit
System Compatibility: Works with ABB REG216/316 protection relays
Voltage Range: 277 / 480 V AC
Frequency: 50 / 60 Hz
Current Range: 5 A – 2000 A
Accuracy: ±2%
Operating Temperature: –20 °C to +55 °C
Storage Temperature: –40 °C to +85 °C
Housing Protection: IP65
Dimensions (H × W × D): 0.5 in × 10 in × 8 in (≈ 1.3 × 25.4 × 20.3 cm)
Weight: 0.5 kg
Country of Origin: Switzerland
Application Areas: Generator protection, power plants, industrial electrical networks

FAQ

Q1: What is the primary function of the ABB REX010?
It detects and protects against generator-side earth faults in medium- and high-voltage systems.

Q2: Which ABB relays is it compatible with?
The unit works with REG216 and REG316 protection relays for full ground fault coverage.

Q3: Can it operate during generator startup?
Yes, it provides protection in all generator states: static, startup, and running.

Q4: Is it suitable for harsh industrial environments?
Yes, the IP65-rated housing allows reliable operation in power plants and petrochemical facilities.

Q5: How precise is the unit’s fault detection?
It has an accuracy of ±2% across a wide current range of 5 A to 2000 A.