/Grounding Transformers/
A neutral point for every ungrounded system.
A grounding transformer is a special-purpose transformer used to provide a ground path for an ungrounded or delta-connected system. By creating a neutral point, it allows protective devices to operate correctly during line-to-ground faults — improving system stability and safety.
/Function & Purpose/
What a grounding transformer does.
On systems with no inherent ground reference, a grounding transformer creates one — giving protection systems a reliable path to detect and clear faults.
Single-Phase Padmount Page
01
Establishes a Neutral Point
Creates a neutral point in otherwise ungrounded systems.
02
Limits Overvoltage
Limits transient overvoltages during unbalanced conditions.
03
Enables Fault Clearing
Provides a return path for ground fault current to activate protective relays.
04
Improves Safety
Enhances personnel and equipment safety by stabilizing system voltages.
built to standard
/Standards & Specifications/
Engineered for Protection
Grounding transformers are designed and tested in accordance with IEEE C57.32 (Requirements, Terminology, and Test Code for Neutral Grounding Devices) and relevant portions of the IEEE C57 series that apply to transformer design and performance.
Magnetics Design offers grounding transformers tailored to customer specifications, ensuring reliable fault protection and compliance with IEEE, IEC, and ISO standards.
112.5–5,000 kVA
Base Rating
Up to 34.5 kV
voltage
IEEE C57.32
Test Standard
/Get a Quote/
Tell us the spec. We'll size it for you.
Give us a system voltage, fault current requirement, and delivery window, and a dedicated rep will follow up with pricing and lead time — most quotes turn around the same or next business day.
Sales
(815) 529-1385
info@magneticsdesigns.com
Response Time
WITHIN 24 HRS
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
When do I need a grounding transformer?
Any ungrounded or delta-connected system that needs a neutral reference for protective relaying, voltage stability, or code compliance is a candidate. Common applications include generator interconnections, industrial delta systems, and isolated distribution feeders.
What's the difference between a grounding transformer and a standard power transformer?
A standard transformer steps voltage up or down to serve load. A grounding transformer’s primary job is to create a neutral point and carry ground fault current briefly during a fault — it’s typically not sized to carry continuous load the way a distribution transformer is.
How is a grounding transformer sized?
Sizing is driven by system voltage and the available or required ground fault current, along with the duration the unit needs to carry that current before protective devices clear the fault. Your rep will size the unit from your system’s fault study or single-line diagram.
Can I get a Made-in-USA grounding transformer?
Yes. Neutral resistors or reactors, current transformers for relaying, and enclosure options can all be added — tell your rep about the protection scheme and we’ll spec it accordingly.
Can a grounding transformer be customized?
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.