BERTA Alert has two acquisition groups. To learn how to view, use and change acquisition group parameters, refer to Signal acquisition section in the BERTA On-Site Tests chapter.
Acquisition Group 1
Acquisition group 1 is the same for all models. The signals from this group are not recorded.
Acquisition Group 2
The signals in Acquisition group 2 differ slightly for the BERTA Alert application are listed below:
| Rotor speed | Unit speed. |
|---|---|
| Mean speed | Mean speed value. |
| Mean power | Mean power value. |
| Mean servos | Mean position of servomotors. |
| Servo filt | Position of servomotors (filtered signal). |
| AD12 filt | Filtered signals from AD12. |
| AD13 filt | Filtered signals from AD13 V pu: Voltage in p.u. |
| Pmec filt | Mechanical power estimated by BERTA (filtered). |
| Pelec filt | Electrical power estimated by BERTA (filtered) Pacc filt: Acceleration power estimated by BERTA (filtered) dw filt: Turbine non-linear model output (filtered) Freq pu: Frequency in p.u. |
| dFreq pu | Frequency delta in p.u. |
| AD1 | Main servo. |
| AD2 | Free (not assigned to any signal). |
| AD3 | Vab. |
| AD4 | Vbc. |
| AD5 | High voltage - Free (not assigned to any signal) |
| AD6 | High voltage - Free (not assigned to any signal) |
| AD7 | High voltage - Free (not assigned to any signal) |
| AD8 | High voltage - Free (not assigned to any signal) |
| AD9 | Ia |
| AD10 | Ib |
| AD11 | Ic |
| AD12 | Low voltage -Free (not assigned to any signal) |
| AD13 | Low voltage -Free (not assigned to any signal) |
| AD14 | Low voltage -Free (not assigned to any signal) |
| AD15 | Low voltage -Free (not assigned to any signal) |
| AD16 | Low voltage -Free (not assigned to any signal) |