ABB Multifunction Protection and Switchbay Control Unit REF542plus

2.1 Configuration

Each application for protection and control can easily be configured by software function

modules, which make arbitrary definition of the following features as part of the secondary

system possible:

LED's (meaning and colors) for local indication

Single Line diagram to show the status of switching devices

Protection schemes

Control schemes

Interlocking schemes

Automation sequences

All functions in the switchbay can be specified in collaboration with ABB. The result of the

configuration is saved and delivered together with the switchboard to the users. By using

the "FUnctional block" Programming LAnguage (FUPLA) the REF542plus Multifunction

Protection and Switchbay Control Unit offers engineers, especially those who are not

software experts, the opportunity of easily updating the operation and handling of the

switchbay.

With REF542plus the user has the benefit of a secondary system that is fully integrated in

a true programmable controller. This flexibility is very advantageous for defining control

functions for automation sequences, which can, for example, include the interlocking of

the switching devices, blocking the release of specific protection functions, as well as

starting switching sequences.

REF542plus multifunctional unit provides a wide range of logical functions so that each

required control schemes can be configured. The range of logical functions includes: