Application

The Generator Protection Unit (GPU-3 Hydro) is a compact microprocessor-based 

protection unit containing all necessary functions for protection of a hydro turbine

driven synchronous/asynchronous generator. It contains all necessary

galvanically separated 3-phase measuring circuits.

The GPU-3 Hydro is well-suited for PLC-controlled systems, and the interfacing can

be done via digital and analogue I/Os or via serial communication.

Display unit

The display unit is separate and can be installed directly on the main unit or in the

front of the switchboard door (3 m display cable included). Up to two additional

displays can be installed within 200 m. The display unit shows all measured and

calculated values as well as alarms and data from the event log.

Self-test

The GPU-3 Hydro automatically carries out a cyclical self-test at start-up.

If any errors are found, they will be displayed in clear text in the display and 

indicated with a relay output (status output).

M-Logic (Micro PLC)

This configuration tool is part of the PC utility software which is free of charge.

With this tool, it is possible to customise the application to your needs.

It is possible to dedicate specific functions or logical conditions to different inputs and outputs.