There are three acquisition groups in the BERTA Certification application:

• The first relates to simulated voltage signals and real-time operation monitoring parameters.
• The second relates to analog signals from the actual speed governor and the BERTA algorithm.
• The third group collects digital signals from the actual speed governor.

Acquisition Group 1 (ACQ-1)

The first acquisition group collects all voltage signals at the reference frequency (60 Hz in North America). This acquisition allows you to compare the simulated voltage with the V_F0 reference voltage.

These are the six signals collected:

• No of overruns = number of overruns.
• Computing time = calculation time.
• Idle time = idle time.
• Time Step = timestep (normally 50 ms),
• V_sim = simulated voltage
• V_F0 = reference voltage.

Acquisition Group 2 (ACQ-2)

The second acquisition group collects the 20 analog signals from the actual speed governor and from the BERTA algorithm. All these signals are recorded in a file for each new test.

These are the signals recorded:

• Cmd servo = input control
• cmd_distrib = distributor control
• out_distrib = distributor output
• out servo
• hn = net available head
• u. = mechanical power in p.u.
• pe_pu = electrical power in p.u.
• pertes rot
• out dw
• out speed
• sig_vt_vr = real speed signal
• sig_pui_vr = real power signal
• limvan_vr = gate limiter
• limpui_vr = power limiter
• consigne_vr = real set point signal
• sig pos vr= real position signal
• sig dw vr = real frequency variation
• dwref berta = speed variation reference (BERTA), • dxref berta = position reference (BERTA),
• dpref berta = power reference (BERTA).

Acquisition 3 (ACQ-3)

The third acquisition group collects all the signals from the actual tested speed governor. None of these signals are recorded. They are simply used to display values in the Dials panel.

These are the 24 signals displayed:

• Major fault
• Minor fault
• Power sensor fault
• Other faults
• Speed signal loss
• In limitation,
• DB in use = dead band
• Gate actuation (Ass vannage)
• Power actuation (Ass puissance)
• Other actuation (Ass autre)
• Pilot grid
• Reduced droop
• Cmd voluntary,
• 65 manual
• 65 Auto
• 65 Dist Hors,
• 65 Dist En,
• Basc_vit_XFR,
• Basc_vit_20,
• Basc_vit_80,
• Basc_vit_85,
• Basc_vit_90,
• Basc_vit_108,

• Basic_vit_110