ABB REF542PLUS CL044123236 Feeder Terminal HMI Unit

Overview

The ABB REF542PLUS CL044123236 is a compact digital feeder terminal designed for substation automation. It integrates protection, control, monitoring, and measurement functions into one unit. Engineers use it in both primary and secondary distribution networks. The built-in HMI enables local control, event diagnostics, and status visualization. Users can customize the software modules for various feeder, transformer, or motor applications.

Technical Specifications

Model: REF542PLUS CL044123236

HMI Features:

• Local panel with pushbuttons and LED indicators

• Optional graphical display

• Event and fault log access

Protection Functions:

• Overcurrent protection (50/51)

• Earth fault protection (50N/51N)

• Directional overcurrent protection

• Breaker failure detection

Measurement Capabilities:

• Voltage, current, frequency, power, and energy

• Direct and calculated values

Inputs/Outputs:

• Freely configurable binary inputs and outputs

• Analog inputs for voltage and current

Communication Protocols:

• IEC 60870-5-103

• Modbus RTU

• Optional IEC 61850

Time Synchronization:

• SNTP or IRIG-B

Mounting Options:

• Flush mounting

• Panel or rack mounting in switchgear cubicles

Operating Temperature:

• Typically –25°C to +55°C (up to +70°C max)

Degree of Protection:

• IP54 or higher for front panel

Compliance:

• IEC 60255, IEC 61000, and related standards