ABB NTDI01 Digital I/O Termination Unit

ABB REF542plus (Base Unit) Digital Bay Control Technology

ABB REF542plus (Base Unit) Digital Bay Control Technology

Availability: 10 left in stock

Product Overview The REF542plus is a high-performance, multipurpose feeder terminal and digital bay control module engineered for medium-voltage power distribution systems. Designed...

SKU: REF542PLUS

Manufacturer: ABB
Product No.: REF542PLUS
Product Type: Feeder Protection and Control Terminal
Product Origin: Switzerland
Payment:T/T, Western Union
Weight: 5000g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Product Overview

The REF542plus is a high-performance, multipurpose feeder terminal and digital bay control module engineered for medium-voltage power distribution systems. Designed by ABB, the REF542plus serves as a comprehensive protection, control, and monitoring hub, integrating high-speed microprocessor technology with flexible logic programming. It is optimized for a diverse range of applications, including feeder, transformer, and motor protection. By utilizing the Function Plan (FUPLA) programming environment, the REF542plus allows for precise customization of protection schemes and interlocking logic, ensuring high-tier reliability in modern substation automation and industrial power grids.

Detailed Technical Specifications

Manufacturer: ABB
Model Designation: REF542plus
Device Type: Digital Bay Control and Protection Unit
Primary Function: Feeder Management, Transformer, and Motor Protection
Auxiliary Power Supply: 24–250 V DC / 48–240 V AC (Configuration dependent)
Rated Current Input: 1 A or 5 A (Software/Hardware configurable)
Rated Voltage Input: Standard 100 V / 110 V AC (Compatible with high-precision sensors)
Protection Logic: Overcurrent (Phase/Earth), directional earth-fault, voltage, frequency, and thermal overload
Measurement Accuracy: Real-time current, voltage, frequency, power, and energy monitoring
Digital I/O Capacity: Multiple configurable channels for local interlocking and remote signaling
Communication Protocols: IEC 61850, Modbus RTU, IEC 60870-5-103
Interface: Integrated LCD display with keypad for local HMI monitoring and configuration
Operating Temperature: -25°C to +70°C
Ingress Protection: IP20 (Rear), IP54 (Optional front panel protection)
Mounting: Panel-flush mount
Dimensions: 190 mm x 170 mm x 200 mm
Shipping Weight: 5.0 kg (3 kg net weight)
Compliance: IEC, CE Standards

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.