Description

The ABB 70PR05B-ES is an advanced numerical protection relay designed for feeder and overhead line protection in medium-voltage distribution networks. Part of ABB’s Reyrolle 70 series, this device combines cutting-edge protection algorithms with robust industrial engineering to secure power systems up to 36kV. The ABB 70PR05B-ES integrates comprehensive protection functions including directional overcurrent, earth fault detection, and arc-flash mitigation, all configurable via intuitive PCM600 software. Its modular design supports seamless integration with IEC 61850-9-2LE process buses and legacy hardwired systems, making it ideal for grid modernization projects. Engineered for harsh substation environments, the relay operates flawlessly at -25°C to +70°C with 95% humidity tolerance. With its high-resolution 5ms fault recording and built-in disturbance recorder (128 events), the ABB 70PR05B-ES enables rapid root-cause analysis while reducing outage times by up to 40% through precise fault location.

ABB 70PR05B-ES

Technical Specifications

Main Features and Advantages

Intelligent Protection: The ABB 70PR05B-ES features adaptive protection curves that dynamically adjust based on load profiles, preventing nuisance tripping during motor starts. Its arc-flash detection uses light sensors (<1ms> Cyber Resilience: Hardware-enforced IEC 62351 security includes role-based access, encrypted communications, and firmware signature verification. The relay achieves SIL-2 safety certification for critical infrastructure.
Operational Efficiency: Automated CT saturation detection prevents relay misoperation during asymmetrical faults. The integrated web server allows remote configuration without software tools.
Diagnostic Capabilities: Continuous self-monitoring of hardware components (RAM, ADC, I/O) with predictive failure alerts. Sequence-of-events (SOE) reporting has 1ms resolution for precise fault analysis.

Application Field

The ABB 70PR05B-ES protects critical feeders in industrial and utility networks. In manufacturing plants, it safeguards 6-36kV switchgear against phase-to-phase faults in cable-intensive environments. Renewable energy farms deploy it for collector line protection, where its directional overcurrent function prevents false trips during generator synchronization.
For mining operations, the relay’s vibration tolerance secures haul truck substations against rockfall-induced shorts. Water treatment facilities leverage its corrosion-resistant coating (IP52) for switchgear in humid pump houses. Infrastructure projects use the ABB 70PR05B-ES for tunnel lighting feeders, utilizing its load encroachment function to distinguish faults from inrush currents.

Related Products

ABB REF615: Feeder protection relay for basic applications

ABB 70PR06-ES: Upgraded version with transformer protection

ABB COM600: Gateway for IEC 61850 system integration

ABB REX640: High-end protection platform

ABB SPAJ 110 C: Legacy electromechanical relay replacement

ABB CMA 72: Advanced arc sensor module

ABB RTU560: Remote terminal unit for SCADA integration

ABB FCP-03: Fiber-optic connection kit

ABB 70PR05B-ES

Installation and Maintenance

Pre-installation preparation: Verify CT circuit burden (<0>ABB 70PR05B-ES chassis directly to substation earth grid using 6mm² copper cable. Apply anti-oxidation compound on aluminum busbars.
Maintenance recommendations: Annually test protection functions via front-panel test socket using primary injection kit. Monthly download disturbance records for waveform analysis. Replace backup battery every 5 years. After firmware updates, validate settings with ABB’s RAICO checksum tool.