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| Recommendations for three phase variable inverter transformer / variac |
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| exit_failure:
For compliance testing purposes I am looking for recommendations for a device that integrates a inverter and an adjustable transformer.The thins I absolutely need are * three phases * min. 125A/67kVA output capability * at least 200V - 530V output rangeI found the Chroma 61800 series (https://www.chromaate.com/de/product/regenerative_grid_simulator_61800_series_161) but this device has much more functionality than I need. All I need is an adjustable transformer that can switch between 50Hz and 60Hz output frequency.Ideally the device should be as small and light as possible. Ideally the price should be under 100.000€. Thanks for your help! |
| jonpaul:
Hello Most variable transformers are designed for 50/60 Hz use, à 50Hz transformer is fine on 60 Hz. At the power level you mentioned the cost of the unit and freight will be 1000s €\$ not 100. For a single qualification test, find an equipment rental house, preferably local. Inverters at these power levels are very large,and even more costly. The inverters are capable of any frequency to 1kHz, so 8f 50 and 60 Hz is needed they are useful Besides a variable transformer, consider a 3 phase generator. Bon chance Jon |
| exit_failure:
--- Quote from: jonpaul on February 06, 2023, 11:17:47 am ---Most variable transformers are designed for 50/60 Hz use, à 50Hz transformer is fine on 60 Hz. --- End quote --- I need one where I can switch the output frequency. --- Quote from: jonpaul on February 06, 2023, 11:17:47 am ---At the power level you mentioned the cost of the unit and freight will be 1000s €\$ not 100. --- End quote --- Up to 250k€ is ok. Under 100k€ would be preferable. --- Quote from: jonpaul on February 06, 2023, 11:17:47 am ---For a single qualification test, find an equipment rental house, preferably local. --- End quote --- I work at a compliance test lab. That's why I'm looking for one. |
| Jeroen3:
Have you considered buying or building a rotary converter with adjustable excitation? |
| Hawaka:
Have a look at Regatron (https://www.regatron.com) or Gustav Klein (https://www.gustav-klein.com/en/). They both have AC programmable source in that power range (or more), and will be less expensive than Chroma (at least Regatron last time I look). I think one of the key factor will be your input type. Single phase, three phase, what voltage? Changing the frequency is easy, but if your input voltage once rectified is less than your max. peak output voltage, then you will have for sure to pay more to get a supply that integrate a DC boost module. Also if you need to be regenerative that will increase considerably the price. |
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