Quick start manual

STER PMU Quick Start Manual Working with the instrument

4 Working with the instrument

4.1 CHANGING MEASUREMENT SETTINGS

In most cases, it is recommended to configure connection settings in the instrument before actually connecting

the cables to the grid, to minimize the amount of inconsistent synchrophasor measurements in your database.

Also, it is recommended to manually stop the remote data connection while doing such changes.

4.1.1 MEASUREMENT SETUP SCREEN

Measurement configuration is performed through the MEASUREMENT SETUP screen.

To access MEASUREMENT SETUP, make sure you are in the main (startup) screen, then press to enter the

SETUP menu, followed by to enter the MEASUREMENT SETUP menu:

Figure 4.1: Accessing the MEASUREMENT SETUP menu

To adjust parameters inside the MEASUREMENT SETUP menu:

 Use up ( ) and down ( ) arrow keys to select individual parameters

 To change the currently selected parameter, use left ( ) and right ( ) arrow keys

Measurement settings are only applied after you exit the MEASUREMENT SETUP screen. To exit this menu and

apply settings, press the to exit the menu, and then confirm the action by pressing :

Figure 4.2: Modifying the Voltage Transformer ratios

Since the instruments primary functions are measuring and communication, intensive communication

with the server or a reset of the communication link (in case of a weak GPRS signal coverage) may

drastically slow down the instruments user interface, or even disable it for short periods of time.

For this reason, it is highly recommended that communication is held at minimum while measurement

settings are being changed to improve your experience and time needed to enter parameters. This can be

achieved by either setting the reporting speed to 1 FPS using the web interface, or completely disabling it

through the Communication setup menu.

4.2 VOLTAGE MEASUREMENT

STER PMU can be connected to a LV, MV or HV power system using different voltage ranges. Three voltage ranges

per wiring configuration are available described in the following tables: