The ibaMS3xAI-1A/100A module has 2 measuring ranges: 1 A_nominal (equivalent to 6.25 A_peak) and 100 A_peak. ibaPQU-S uses both ranges to calculate the characteristic values in this module:

• When the current values range between -6.24 and +6.24 A, the 1 A_nominal range is used.

• Once a measurement is outside the range, the 100 A range is activated. The 1 A_nominal range is only reactivated if no measurement has been outside the range ± 6.24 A for a period of one second and either zero crossing occurs or another 200 ms have passed. These times are valid for 50 Hz or 60 Hz and have to be increased accordingly at lower frequencies (e.g. 25 Hz means twice the time).

In this context, the range of the set signal (in the network definition) is irrelevant; the algorithm described above will always be used.

For signals captured as raw signals, the range settings in ibaPDA take effect.