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 dcs-sis.com 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. The range of logic functions includes

AND logic gates

NAND logic gates

OR logic gates

NOR gates

XOR gates

Bistable and Monostable Flip-Flops

Bistable and Monostable Flip-Flops

Timers

Pulse Generator

Memory

Similar to the free definition of control schemes, each required protection scheme can be configured by combining the available protection function modules.

For example, the following protection functions are available:

Timed overcurrent protection

Inverse time overcurrent protection

Directional overcurrent protection

Undervoltage or overvoltage protection

Distance protection

Transformer and motor differential protection

Cable, transformer and motor thermal protection

Reverse power protection

Synchronisation check