Transformers for Data Centers and Critical Facilities
Transformers step voltage up or down and isolate and condition power for data centers and critical facilities. Dry-type and cast-resin transformers are common indoors, K-rated transformers handle the harmonic-rich loads of IT equipment, and unit substations combine transformer and switchgear. Comp-Utility specs, installs, and services transformers across Central Texas, sized and configured for your electrical design.
What We Provide
Our Capabilities
Transformer Selection and Sizing
We size and specify dry-type, cast-resin, and K-rated transformers for your loads and one-line.
Learn moreInstallation and Integration
We install and integrate transformers with switchgear and distribution, including unit substations.
Learn moreTesting and Maintenance
We test and maintain transformers, including thermal scanning, for reliable, efficient operation.
Learn moreCondition the Power
Right-Rated Transformers for Harmonic IT Loads
Data center loads are nonlinear and harmonic-rich, which can overheat a standard transformer. K-rated transformers are designed to handle these harmonics without derating or excess heat, protecting reliability and efficiency.
Comp-Utility specifies dry-type, cast-resin, or K-rated transformers and unit substations sized to your loads, and installs and maintains them as part of the power system.
The Comp-Utility Difference
Why Comp-Utility?
Engineer-Owned and Operated
Comp-Utility is owned and operated by engineers, with licensed Texas Professional Engineers (P.E.) on staff. That rigor anchors every design, specification, and installation.
Turnkey, Single-Contract Partner
We sell, design, install, and maintain complete infrastructure end to end. One accountable team and one contract for power, cooling, distribution, and cabling.
Trusted Since 1992
We have designed, installed, and maintained mission-critical power and cooling infrastructure across Central Texas since 1992, through every generation of the technology.
Long-Standing Distribution Partner
As a long-standing distribution partner of Eaton, Schneider Electric, and Vertiv, we specify best-in-class systems and back them with factory-grade service.
Licensed, Certified & Recognized
We hold ourselves to the standards of the institutions we serve, from professional licensure and jobsite safety to the industry organizations that set the bar for mission-critical work.
Licensed Professional Engineers
State of Texas (TBPE)
OSHA 30 Certified
Field Technicians
AFCOM Member
Data center industry association
7x24 Exchange Member
Mission-critical infrastructure
Frequently Asked Questions
What role do transformers play in data center power?
Transformers step voltage up or down between the utility, distribution, and equipment, and provide isolation and power conditioning. A data center commonly uses transformers to step medium voltage down to usable low voltage and to feed PDUs and equipment. Proper transformer selection and sizing are essential for reliable, efficient power distribution.
What is the difference between dry-type and liquid-filled transformers?
Dry-type transformers use air or solid insulation and are common indoors because they avoid the fire and containment concerns of liquid-filled units, while liquid-filled transformers use oil or other fluid for cooling and are often used outdoors or at higher capacities. Cast-resin is a robust dry-type option. Comp-Utility specifies the type suited to your location and capacity.
What is a K-rated transformer and why does it matter?
A K-rated transformer is designed to handle the harmonic currents produced by nonlinear IT loads (like switch-mode power supplies) without overheating or derating. Standard transformers can overheat under these loads. K-13 and K-20 ratings indicate harmonic handling capability. Comp-Utility specifies the appropriate K-rating for your IT load to protect reliability and efficiency.
What is a unit substation?
A unit substation combines a transformer with primary and secondary switchgear in a coordinated assembly, providing a compact, integrated step-down and distribution solution. It simplifies design and installation for larger facilities. Comp-Utility specifies unit substations where an integrated transformer-and-switchgear solution fits the electrical design.
How do I size a transformer for my facility?
Transformer sizing is based on the connected load in kVA, the voltages involved, harmonic content (driving the K-rating), and growth headroom. Comp-Utility's engineers calculate the load, account for harmonics and future expansion, and specify the kVA rating, impedance, and K-rating, then integrate the transformer into your one-line.
What maintenance do transformers require?
Dry-type transformers require periodic inspection, cleaning, thermal (infrared) scanning to find hot connections, connection torque checks, and insulation testing, aligned with NFPA 70B. Maintaining transformers prevents overheating and failures. Comp-Utility includes transformers in electrical maintenance and testing programs across Central Texas.
Can long transformer lead times affect my project?
Yes. Large transformers can have significant procurement lead times, which must be planned into a project schedule. Comp-Utility accounts for transformer lead times in project planning and procurement so they do not delay your build, and advises on options where schedule is critical.
Who supplies and services transformers in Central Texas?
Comp-Utility specs, supplies, installs, and services transformers, including dry-type, cast-resin, K-rated, and unit substations, across Central Texas, with testing and maintenance. Engineer-owned since 1992 with licensed Texas P.E.s. Call (512) 346-0999 or email sales@comp-utility.com.