Functions

The REF542plus multifunctional protection and switchboard control unit integrates all auxiliary functions in one unit.

The multifunctional unit also has a self-monitoring function. All functions are designed as freely configurable software modules.

As a result, the various operational requirements of a MV station can be met without any problems.

The versatility of the software allows the REF542plus to be used on every switchboard regardless of the specific application requirements.

Configuration

Each protection and control application can be easily configured via the software function module, which allows the following functions to be arbitrarily defined as part of the secondary system:

LEDs for local indication (meaning and colour)

Single line diagrams showing the status of switching devices

Protection programme

Control programmes

Interlocking programmes

Automation sequences

All functions of the switchboard can be specified in co-operation with ABB. The configuration results are saved and delivered to the user together with the switchboard.

By using the “Function Block” programming language (FUPLA), the REF542plus multifunctional protection and switchboard control unit provides engineers, in

especially non-software specialists, the opportunity to easily update switchboard operation and handling.

With the REF542plus, users can fully integrate secondary systems into a true programmable controller.

This flexibility is very favourable for defining control functions for automation sequences.

This can include, for example, interlocking of switchgear, preventing the release of specific protective functions and initiating switching sequences.

The REF542plus multifunction unit offers a wide range of logic functions so that the various required control schemes can be configured.

The required control schemes are configured.