High speed data capture for 3 phase power.

[HackedFridgeMagnet]

Hi

We ( a university) are looking to improve our data capture capability for 3 phase power. Especially important is high speed capture.
We would like to measure 3 phase at up to 100kVA.
Looking at transient response, harmonics, voltage, current, phase, efficiency, power.
Hopefully with some sort of api to log and display stuff.
It doesn't need to be portable as it would normally sit in the same lab but would need to be re-plugged into different parts of the system.

currently we use
https://www.keysight.com/us/en/product/PA2203A/integravision-power-analyzer-4-channels-3-phase-ac.html
which are very good, but still have quite a few issues. Including the screen update rate ( would you believe).

One option i have found is https://dewesoft.com/products/sirius-xhs which provides 5 MHz bandwidth,15 MS/s, 16 bit. This would be enough for us. 1x HV for voltage, 1 x LV for current, we have the current transducers set up. They are time-synched too.

XHS-HV: Highly isolated CATII 1000V amplifier. Measure in a range of 20 V to 2000 V peak directly. 5 MHz bandwidth. 0.03% accuracy. This amplifier is perfect for the direct connection of high-voltage signals.

XHS-LV: Highly isolated voltage input amplifier. Measure in a range of 0.05 V to 100V. 5 MHz bandwidth. 0.03% accuracy. It offers sensor excitation. This amplifier is perfect for a direct connection of low voltage signals and current transducers.

Does anyone have any opinions of or experience with Dewesoft equipment and especially software that they could tell me about?
Does anyone have any other ideas for something suitable?
We're not afraid "roll our own" but we cant compete with Dewesoft's specs.

[TizianoHV]

Hi,
I have no experience with Dewesoft but I'm interested in this sector. It would be useful to know what you need to do (if it's not a problem). What bandwidth do you need (50Hz or high frequency drives...)? What you mean with high-speed capture (fast sampling or fast logging of rms values)?

Since you already have the Agilent analyzer you could get a "cheaper" specialized power analyzer for "high speed capture" and use the Agilent for harmonics and for slower but high accuracy measurements.

Regarding the Sirius-xhs, they seem a nice company. I watched some of the documentation and it seems all well done and detailed.
They specify a CATII 1000V rating (same as Agilent), Could it be a limitation?

[2N3055]

Take a look at Picoscope offering. Maybe they have something..

[HackedFridgeMagnet]

We study all aspects of sub 1000V power delivery.
Obviously want to make mains power inverter measurements, car chargers, load transients and also electric vehicle drive trains.

I am not sure what the top sample rate we would be interested in is but 15Meg/samples/sec sounds plenty.
I have been lent an other model unit.
I will see what I can get out of it.