trait
Versatility: Set protection, control, measurement, communication and monitoring functions in one.
Flexibility: Can be used for feeder protection, transformer protection, motor protection and control, or can be used as a control device alone.
Programmability: All functions are implemented through a programmable environment, providing a high degree of flexibility and scalability.
Advanced digital technology: It can monitor the status of the power system in real time and respond quickly to abnormal situations.
High definition display: The control display panel adopts high definition display for easy viewing and operation.
Multiple protocols: Supports multiple protocols, including IEC61850, for easy integration into ABB or third party substation automation systems.

Parameters and specifications
Model: REF542PLUS
Input voltage: May include 220V AC (for power supply) and 24V DC (for other applications)
Supply voltage range: 85-265V AC
Output end: 4-20 mA
Interface: RS485
Communication rate: 9600bps
CPU: 400 MHz ARM CPU
Flash: microSD card (128 MB, replaceable)
RAM: 64 MB DDR2
Ethernet interface: May include two 10/100 Mbit/s Ethernet interfaces and one Ethernet interface for programming or general network connection
Size and weight
Size:
220*165mm
120mm×80mm×40mm
132mm105mm52mm
Weight:
1KG
0.5 kg
2KG