Choosing a transformer for voltage regulation starts with a basic but consequential question: does the installation call for electrical isolation, or does it need a defined three-phase voltage conversion? The 30kVA Isolation Transformer and the SFX 10KW Converter address different electrical roles, so the right pick depends more on the job at hand than on a simple side-by-side power figure.
Quick verdict
Neither model is a direct stand-in for the other. The Sheng Yu option is built around an isolation-transformer format and includes an industrial EMC filter, while the SFX is described around a specific three-phase input-to-output arrangement. Their listed prices are separated by USD 2,063.89, so the intended electrical role should lead the decision rather than price alone.
| Model | Listed price | Stated electrical configuration | Notable listed detail |
|---|---|---|---|
| 30kVA Isolation Transformer | USD 3,462.89 | 3-phase isolation transformer; 450 V primary | Schaffner FN3270H-55-34 industrial EMC filter |
| SFX 10KW 3-phase Converter | USD 1,399.00 | 3-phase 220 V input to 380 V output | Maximum compatible appliance wattage: 10000W |
Where each model wins
30kVA Isolation Transformer: This is the stronger match for industrial machinery, laboratory use, or sensitive electrical-distribution work where the project calls for a three-phase isolation transformer. Its integrated Schaffner industrial EMC filter is a meaningful part of its stated design, rather than an add-on detail.
SFX 10KW 3-phase 220V to 380V Voltage Transformer Power Converter: Choose this one when the required task is the stated conversion from three-phase 220 V input to 380 V output. It is the more focused choice when that voltage arrangement is the central requirement and a maximum compatible appliance wattage of 10000W suits the planned load.
Product notes
30kVA Isolation Transformer | 3-Phase Industrial Power Converter | New in BOX
The Sheng Yu unit fits projects centered on industrial isolation and filtering. A concrete reason to select it is the integrated Schaffner FN3270H-55-34 industrial EMC filter, paired with a robust metal housing and integrated wheels for easier handling. The stated applications-industrial machinery, laboratories, and sensitive electrical-distribution systems-also align with that configuration. Its listed price is USD 3,462.89, which places it at the higher end of this comparison. The listed 450 V primary specification and 40 A nominal primary current further define this model as a particular industrial electrical component, rather than a general-purpose voltage-conversion choice.
SFX 10KW 3-phase 220V to 380V Voltage Transformer Power Converter
The SFX converter is the better fit when the project calls for voltage conversion rather than an isolation-transformer format. Its USD 1,399.00 listed price is lower than the other option, while its description directly addresses three-phase conversion work. The operating details are important here: it is stated to work normally with up to 25% load imbalance. Its main constraint is equally specific-if the input changes, the output changes too. Above the stated load-imbalance point, the description says voltage becomes unbalanced and current flows in the neutral wire. That makes this a purpose-specific selection for installations matching its stated electrical arrangement.
Final choice by use case
Pick the 30kVA Isolation Transformer for industrial, laboratory, or sensitive-distribution work where an integrated EMC filter and isolation-transformer design are central to the project. Pick the SFX 10KW 3-phase 220V to 380V Voltage Transformer Power Converter when the defining need is the listed three-phase conversion arrangement. For a project involving both isolation and voltage conversion priorities, begin with the primary electrical role rather than treating these two models as interchangeable.
