/Substation Transformers/
Ruggedized For The Yard. Built for The Load.
These ruggedized transformers are ideal for substation yards and power distribution line-ups, powering projects from facility feeders to grid-scale infrastructure.
/SPECIFICATIONS/
Substation Transformer Specs
Magnetics Design’s liquid-filled distribution substation and power-class substation transformers are designed, built, and tested in accordance with the highest industry standards, including NEMA, ANSI C57, DOE, and IEEE as applicable. With a range of customizable features, our substations can be configured to maximize performance, minimize potential arc flash exposure, and address environmental concerns.
All designs can be supplied with full or partial length air terminal chambers to make installation easy.
300–160,000 kVA
kva
Up to 230 kV
voltage
Liquid-Filled
FILL TYPE
Same-Day Quotes
Price and lead time today.
3-Year Warranty
Price and lead time today.
USA Options
Price and lead time today.
classes.
/Substation Classes/
Power Projects Of Every Size.
Magnetics Design builds substations ranging from 300 kVA to 160 MVA, providing reliable power to projects of every size.
CLASS 01 — DISTRIBUTION
Distribution Substation
300–5,000 kVA · up to 35 kV
Medium-voltage substations for stepping down and distributing power to facility or feeder-level loads.
CLASS 02 — POWER
Powerclass Substation
5,000–160,000 kVA · up to 230 kV
High-voltage, power-class substations built for grid interconnection, generation step-up, and large industrial or utility load-serving applications.
/Stock & Custom/
Hit Your Lead Time, Every Way.
Magnetics Design keeps substation transformers in stock for fast deliveries and builds custom units with some of the best lead times in the industry.
STOCK
Ready to Ship
Hit project deadlines with common kVA sizes and voltages, in stock and ready to ship.
CUSTOM
Built to Spec
Build exactly what you need with extensive transformer customizations available.
REMANUFACTURED
Like-New, Faster
Save time and money with remanufactured substations, rebuilt to like-new standards.
/Customization/
Meet any spec.
Meet your exact requirements with transformers designed, built, and tested in accordance with the highest industry standards, including NEMA, ANSI, DOE, and IEEE as applicable.
On-Load Tap Changer
On-load tap changers let you adjust voltage without taking the transformer offline, helping keep power steady and avoiding unnecessary downtime during normal operation.
Pressure Relief Device
Pressure relief devices release excess internal pressure if something goes wrong inside the tank, protecting the transformer from damage and improving site safety.
Fan Package (ONAN/ONAF)
Fan packages cool the transformer based on load demand, using natural cooling under normal loads and forced-air cooling when the transformer is carrying heavier loads.
Primary Load-Interrupter Switch
Primary load-interrupter switches give crews a safe way to disconnect and isolate the transformer under load, making maintenance easier and protecting the rest of the system.
FR3 Oil
FR3 oil is a biodegradable alternative to mineral oil that offers better fire safety, longer insulation life for extended transformer performance, and reduced environmental risk.
Gauges with Contacts
Gauges track key transformer conditions like oil level, temperature, and pressure, sending alarms when readings move out of range so issues can be caught early.
/Get a Quote/
Get a Quote in Minutes.
Fill out the form and we’ll get back to you as soon as possible. Our average response time during business hours is 30 minutes.
Contact Details
Sales
(815) 529-1385
info@magneticsdesigns.com
Response Time
WITHIN 24 HRS
ELECTRICAL SPECS
What Our Clients Say
By Magnetics Design Substations.
Advanced transformer solutions designed to improve power quality, reduce harmonics, and maximize system performance.
We were struggling with severe harmonic distortion on our main drive lineup. Magnetics Design engineered a 24-pulse phase shifting unit that dropped our THD well below IEEE 519 limits.
Brian John
My Client
Magnetics Design turned around a quote for a custom 18-pulse transformer the same day. The build quality was exceptional, and it arrived right on schedule for our shutdown window.
Felix Chou
My Client
The VFD isolation properties on these units are bulletproof. We source all our specialty phase shift transformers from the Magnetics Design team because they get the specs right the first time.
Anna Choux
My Client
Questions Engineers Ask
What's the difference between cooling classes?
ONAN (Oil Natural, Air Natural) relies on natural convection and is standard on most substation units. ONAF adds a fan package that engages under heavier load, letting the same core and coil carry more kVA without a larger frame.
What is close coupling and when is it used?
Close coupling pairs a substation transformer directly with adjacent switchgear or a load-interrupter switch, shortening bus runs and tightening the footprint — useful where yard space or arc-flash boundaries are limited.
Do you carry remanufactured substation transformers?
Yes. Remanufactured units are inspected, tested, and rebuilt to like-new electrical standards, and typically cost less than a new build with a shorter lead time. Each one ships with test reports.
What's your return and exchange policy?
Stock units can generally be returned or exchanged within a set window if they haven’t been installed or energized; custom-built units are non-returnable once production starts.
Can I get a Made-in-USA substation transformer?
Domestic build and sourcing options are available for projects that require Buy America or similar compliance. Let your rep know up front so the quote reflects the right manufacturing path.