ABB REF542plus 1VCF752000 (1VCF750170R804) Bay Control

Terminal

The REF542plus (1VCF752000 / 1VCF750170R804) is a modular, multi-functional bay control and protection unit engineered for medium voltage (MV) power systems. Representing a high-performance evolution of the original REF 542, this terminal is a mechanical necessity for modern digital substations. 

Technical Specifications

• Manufacturer: ABB

• Model Designation: REF542plus

• Part Number: 1VCF752000

• Ordering Code: 1VCF750170R804

• Device Function: Bay Control and Protection Unit

• Application Scope: Feeder, Transformer, and Motor Protection

• HMI Display: Large LCD with programmable function keys

• Measurement Accuracy: High-precision sampling for U, I, P, Q, and Cos phi

• Communication Protocols: MODBUS RTU, IEC 60870-5-103, LonTalk, SPA-bus

• Protection Functions: Overcurrent, Earth Fault, Distance, Differential, and Thermal

• Control Capabilities: Up to 10 binary inputs and outputs (scalable via I/O boards)

• Operating Voltage: Universal power supply options (24V to 240V AC/DC)

• Self-Diagnostics: Continuous hardware watchdog and software monitoring

Key Functional Characteristics

All-in-One Digital Bay Management

The REF542plus (1VCF752000) eliminates the need for separate meters, transducers, and control switches. By consolidating these functions, the terminal provides a unified interface for operators to monitor real-time electrical parameters and control primary switchgear components. This integration significantly reduces the complexity of secondary circuits and lowers the total cost of ownership for substation automation.

Exceptional Flexibility and Scalability

Unlike rigid traditional relays, this terminal is highly programmable. Using the ABB configuration software, engineers can create custom logic blocks tailored to the specific operational requirements of a substation. Whether protecting a standard radial feeder or a complex transformer arrangement, the 1VCF750170R804 can be scaled through modular I/O expansion to meet evolving grid demands.

Seamless Automation Integration

The terminal serves as a critical data node within the wider substation network. With its integrated communication protocols, it supports vertical integration into SCADA systems and horizontal peer-to-peer data exchange. This connectivity ensures that fault records and disturbance data are captured and transmitted instantly for rapid post-fault analysis.