Choosing between two step-down transformers that both take 480V in and deliver 380V out can feel like a coin toss, but the differences in this matchup are concrete. In the inverters power conversion category, you're looking at two XING Laser units: a 50kVA model at USD 1,050.00 and a 30kVA model at USD 950.00. Both are three-phase autotransformers for AC-to-AC conversion. The real decisions are load capacity, condition, and what you're willing to pay.
Quick verdict: If you want a new unit and a lower listed price, the 30kVA transformer is the straightforward pick. If you prefer a higher nominal kVA rating and an explicit 60 Hz operating frequency, the 50kVA model could be worth the extra $100 - just be ready for its open-box condition. Keep in mind that both listings state the same maximum resistive and inductive load limits.
| Specification | 50kVA Step Down Transformer 480V to 380V | 30kVA Step Down Transformer 480V to 380V |
| Listed price | USD 1,050.00 | USD 950.00 |
| Condition | New - Open box | New |
| Nominal capacity | 50 kVA | 30 kVA |
| Max resistive load (stated) | 24 kVA | 24 kVA |
| Max inductive load (stated) | 18 kVA | 18 kVA |
| Max operating frequency | 60 Hz | Not listed |
Where the 30kVA wins: It costs $100 less, is listed as new, and carries the same stated load limits as the pricier unit. For many installations, that makes it the more practical choice if the 30kVA nameplate matches your equipment.
Where the 50kVA wins: It offers a higher nominal kVA rating and lists a 60 Hz maximum operating frequency. That frequency spec could be useful if your equipment is explicitly rated for 60 Hz operation.
50kVA Step Down Transformer 480V to 380V
At USD 1,050.00, this is the higher-priced unit, but it also brings a larger nameplate capacity. The listing specifically mentions a 60 Hz maximum operating frequency, which might be the deciding factor in a facility that runs 60 Hz gear. However, the condition is listed as New - Open box, and the description notes that the original box is missing. The stated maximum resistive load is 24 kVA and inductive load is 18 kVA, so confirm your actual draw against those numbers before choosing this 50kVA model over the smaller one.
30kVA Step Down Transformer 480V to 380V
This 30kVA unit is listed as new for USD 950.00, making it the more economical upfront option. It shares the same 480V primary / 380V secondary, three-phase, AC-to-AC step-down function, and the same stated load limits as its larger sibling. If you don't need the extra headroom of a 50kVA nameplate and prefer a unit that hasn't been opened, this is the one to consider. The omission of a stated maximum frequency isn't necessarily a drawback, but it's a spec you won't find here, so review your system's frequency requirements.
Final choice by use case: Choose the 30kVA transformer if you want a new unit at a lower listed price and your load stays within the stated 24 kVA resistive / 18 kVA inductive limits. Choose the 50kVA transformer if you want a higher nominal kVA rating, need the explicit 60 Hz operating frequency, and are comfortable with a new-open-box unit at the higher listed price.
