Choosing a step-down transformer for a 480V to 400V industrial power line isn't just about the kVA rating. The load type-resistive or inductive-determines how much of that rating you can actually use. The XING Laser 30kVA step-down transformer is designed for this exact conversion, but it comes with specific load ceilings you need to understand before committing.
Quick Verdict
This new 3-phase autotransformer from XING Laser steps 480V AC down to 400V AC, but its headline spec is the load limit: up to 24kVA for resistive loads and 18kVA for inductive loads, representing 80% and 60% of the 30kVA rating. If your equipment fits those caps, it's a solid choice.
Who It Suits
This transformer suits industrial settings that need a reliable 480V to 400V conversion and where the connected loads are well-characterized-so you can identify whether they're resistive or inductive. It also works well for operations with continuous running equipment, thanks to its built-in ventilation for heat dissipation.
What Stands Out from the Listed Details
XING Laser 30kVA Step-Down Transformer
Priced at USD 900.00, this transformer is listed as new and built as a 3-phase-to-3-phase autotransformer with a primary voltage of 480V and secondary of 400V, supporting a maximum operating frequency of 60Hz. The unit handles AC-to-AC conversion and is manufactured in China. A concrete reason to consider it is the explicit load guidance: knowing the 24kVA resistive and 18kVA inductive limits takes the guesswork out of sizing. The enclosure's dimensions are 20.5 by 17 by 21.5 inches, with a gross weight around 100kg, and the built-in ventilation is a practical feature for continuous operation. Installation requires verifying input voltage, output voltage, frequency, and load requirements before connecting power, and the load limits themselves are hard caps you shouldn't exceed.
Meaningful Trade-offs
The main trade-off is that the 30kVA nameplate isn't fully usable across all load types-you have to match your actual demand to the stated resistive and inductive caps. This unit also has a substantial footprint and weight, so plan for a permanent installation with adequate clearance. Since the transformer is specified at 60Hz, confirm that matches your power system.
Bottom Line
If your industrial process calls for a 480V to 400V step-down, the XING Laser 30kVA transformer is a straightforward option to evaluate. The clear electrical ratings make it easy to compare against your needs, but the deciding factor will always be whether your load profile stays within the unit's stated capacity.
