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JCL technician at an energized substation transformer behind the fence
Products

Substation transformers.

Medium and large power transformers for utility and industrial substations — engineered, installed, and serviced by one accountable team.

A JCL power transformer set by crane onto its pad
What we get called for

Most conversations start here.

Start with the problem in front of you.
“Can you help us specify the right power transformer?”
JCL
We'll review your one-line, project requirements, and utility specifications to recommend the right solution.
“We're replacing an existing substation transformer.”
JCL
We'll help identify a replacement that integrates with your existing system while minimizing downtime and project risk.
“Can you build to our project specifications?”
JCL
From cooling and impedance to taps and accessories, we'll engineer a transformer that meets your application.
“Can you meet our project schedule?”
JCL
We'll provide realistic lead times, proactive communication, and rental support when timing is critical.
“What if our project requirements change?”
JCL
Projects evolve. We'll work with you as specifications, schedules, and site conditions change to keep everything moving.
“Can you support us after installation?”
JCL
From commissioning and field service to testing, maintenance, and future replacements, we're here long after the transformer is energized.
Built to be serviced

Serviceable for decades, by design.

Because the same team that builds the unit also tests, commissions, and maintains it, the details that matter in the field are engineered in from the start.

01
HV bushings & ATC
Connections engineered to your interconnect.
02
Radiators & fan cooling
Staged ONAN / ONAF cooling sized to your load.
03
Gauges & sudden-pressure relay
See conditions at a glance; protection seals in on a fault.
04
LTC & control cabinet
Tap changer and controls built to be serviced for the long haul.
A gray substation transformer with HV bushings, arresters, radiators, and gauges
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Power transformer — hover a detail to find it
Configure your unit

Specified down to the bushing.

Every unit is engineered to your project — connections, fluid, construction, and protection built in from the start, not bolted on after.

HV / LV connections

Air terminal chamber (ATC)Throat connectionFlangedSide or cover-mounted bushings

Fluid

Type II mineral oilEnvirotemp FR3

Construction

5-legged or 3-legged coreRectangular-wound copper or aluminumCircular-disc copper windingsCarbon-reinforced or stainless tank

Optional features

Gauges with contactsExternal drain & sample valveElectrostatic shieldingK-factor designSurge arrestersFan coolingAuxiliary control cabinetSudden-pressure relay w/ seal-in

Not seeing a provision you need? If it can be engineered into a substation unit, we’ve built it. Ask our engineers →

Range & scale

Rated for the backbone of the grid.

Distribution and power-class substation transformers, engineered to the job in front of you — not pulled off a shelf.

Power & distribution class
500 kVA
– 100 MVA

Whether it’s a 750 kVA distribution unit or a 60 MVA power transformer, it’s engineered to your one-line, your footprint, and your interconnect — then tested and commissioned by the same team that built it.

Higher voltage classes up to 345 kV engineered to order.

Where these units go
Utility substationsIndustrial plantsRenewable interconnectData center campusesGeneration step-up

Spec it with an engineer.

Bring the one-line, the ratings, and the site. We’ll engineer the right power transformer and tell you when it ships.