Based in Gurnee, IL, American Industrial Co. is a single-source manufacturer with over 30 years of expertise in precision metal stamping and laser cutting services. They specialize in custom-stamped copper and aluminum busbars, critical components for reliable power distribution.
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Substation Equipment Manufacturers
Last updated: January 2026
This directory lists 80 substation equipment manufacturers across the United States, from complex power transformers to modular HV/MV switchgear assemblies.
Buyers in this space are typically solving problems related to grid stability, integrating new generation sources like large-scale solar or wind farms, or modernizing facilities to handle increased load demands and bidirectional power flow. They require equipment capable of managing high fault current levels, ensuring robust relay protection schemes, and providing seamless SCADA integration for remote monitoring and control.
The suppliers found here range from large, established OEMs that provide integrated turn-key substation solutions to specialized fabricators focusing on specific components like custom busbar systems, control houses, or specific types of circuit breakers. Some manufacturers excel in traditional air-insulated switchgear (AIS), while others offer more compact gas-insulated switchgear (GIS) solutions, catering to different footprint and environmental requirements.
When engaging with these manufacturers, buyers should arrive prepared with detailed Single Line Diagrams (SLDs), specific electrical and mechanical specifications, environmental conditions, and clearly defined Factory Acceptance Test (FAT) requirements. Suppliers, in turn, expect a comprehensive understanding of applicable ANSI/IEEE or NEMA standards, project timelines, and budgetary constraints to provide accurate and competitive proposals.
A significant trend influencing this category is the push for grid modernization and digitalization. Manufacturers are increasingly incorporating advanced substation automation, intelligent electronic devices (IEDs), and cybersecurity features into their offerings. The focus is shifting towards more resilient, self-healing grids, capable of integrating various Distributed Energy Resources (DERs) and withstanding extreme weather events.
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Company Directory
80 companies nationwide
Based in Sugar Land, TX, AMRAN Instrument Transformers manufactures low and medium voltage Current and Voltage Transformers (CTs and VTs). Their specialized products, rated up to 34.5kV, meet IEEE/ANSI and IEC standards, with UL/CSA/CE approvals. They provide essential components for global substation and electrical grid applications.
Basler Electric, now part of Littelfuse, Inc., provides energy technology and power system solutions. Leveraging over eight decades of experience, the company delivers high-quality products tailored for diverse sectors. They specialize in innovative technologies essential for robust energy infrastructure, including substation applications.
Nextpower manufactures specialized equipment for photovoltaic power supply networks, offering 1500 VDC PV DIN Rail Surge Protection Devices for lightning surge protection. The company provides comprehensive support for solar energy projects, from design through operations, including logistics and installation, aiming to advance energy solutions.
Based in Sacramento, CA, Butcher Power Products manufactures utility-grade low and medium voltage switchboards and switchgear for power distribution. Specializing in solutions up to 38kV, the company serves mission-critical environments like data centers and industrial facilities. They offer custom-built and configurable systems, emphasizing EUSERC compliance and short lead times.
Based in Burlingame, CA, CIMI is a manufacturer of Surecon brand electromechanical relays, serving industries that utilize these critical components for over two decades. The company also specializes in precision die-casting services and the production of specialty magnets for various applications.
Based in Orange, California, Coil Winding Specialist, Inc. designs and manufactures single and 3-phase, dry and oil-filled transformers. They specialize in power and distribution transformers up to 1000 KVA (1 MVA), alongside custom inductors, chokes, and magnetic coils for industrial applications.
Based in Mather, CA, Construction Innovations specializes in turnkey engineering and manufacturing of rapidly deployable substations and switchyards. As a vertically integrated company, they provide comprehensive solutions for high-voltage infrastructure.
Control Panels USA Inc. is a manufacturer of custom control panels and relay rack assemblies. The company offers design, fabrication, and full turnkey Instrumentation and Control (I&C) services for OEM clients, contractors, and end users across various industries, including those requiring substation equipment components.
Corrse, based in Lake Nacimiento, California, specializes in the manufacturing and installation of professional industrial low voltage switchgear. They provide UL Listed equipment and offer fast lead times for various industrial applications. The company directly serves B2B clients with essential electrical infrastructure components and expert manufacturing services.
Based in Ontario, CA, DEI Power Solutions manufactures UL 891 certified low voltage switchgear, custom panelboards, and custom busbars. They offer design, engineering, and retrofitting services for robust electrical infrastructure. Specializing in compliant solutions for diverse power distribution needs, they serve industrial and commercial clients.
Based in Pineville, LA, DIS-TRAN Packaged Substations designs and supplies high-voltage, open-air substations and switchyards. Since 1965, the company has offered factory-built substations, pre-fabricated bus solutions, and packaged substations with storm hardening capabilities for industrial applications.
Based in Santa Clara, CA, E-Fab manufactures precision aluminum, multi-layer, and two-layer busbars. Tailored to exact specifications, they utilize materials like copper, stainless steel, beryllium copper, nickel, and aluminum. E-Fab provides specialized electrical components, ideal for substation equipment manufacturers.
Electro-Mechanical Industries, Inc. designs and manufactures custom electrical enclosures and switchgear for diverse applications. They provide tailored solutions for commercial, industrial, mining, mission critical, and renewable energy electrical projects, focusing on specific customer needs and industry requirements.
Based in Sacramento, CA, Electrical Design Technology, Inc. provides power distribution equipment and engineering services. The company specializes in electrical substations, offering mobile, primary, and traction power substations. Products also include battery systems, circuit breakers, switchgear, and cast resin transformers for private and government institutions.
Based in North East, PA, Electric Materials Company manufactures high-quality electrical grade copper and fabricated copper components. They produce extrusions, castings, forgings, and busbar solutions for power distribution, power generation, and industrial markets from their large US-based facility.
Based in Cincinnati, OH, ELSCO Transformers manufactures high-quality medium-voltage transformers. They offer dry type and padmount models with 500-2500 KVA ratings and 2400-34,500 primary voltages. The company is committed to supplying efficient, reliable power solutions for diverse industrial applications.
Based in Bristol, VA, Federal Pacific specializes in custom-engineered modular substations. They provide temporary or permanent power distribution solutions, precisely tailored to client needs and specifications. Their expertise ensures robust and reliable substation equipment for various industrial and commercial applications.
General Atomics Electromagnetic Systems (GA-EMS) designs, develops, manufactures, and tests high voltage capacitors, pulsed power systems, and energy storage banks. These components are critical for substations and energy infrastructure, serving defense, energy, and commercial sectors with advanced technological solutions.
Based in Crystal Lake, IL, G&M Manufacturing Corporation specializes in precision metal stamping and busbar manufacturing. Established in 1967, they produce high-quality stamped bus bars essential for transmitting current from high-powered sources. G&M serves diverse industries, providing reliable metal components critical for various electrical applications, including substation equipment.
GE Vernova specializes in the design and manufacturing of high, medium, and low voltage instrument transformers, serving as an industry leader in substation equipment. The company also provides electrification systems, energy generation technologies, and sustainability solutions, operating globally to support the energy transition.
Based in Parkesburg, PA, High Energy Corp. specializes in manufacturing high voltage and high frequency capacitors. These essential components are designed for various industrial applications, including integration into substation equipment. The company offers quick turnaround times on standard products.
Keats Manufacturing specializes in precision metal stamping, providing progressive die and four-slide solutions for demanding parts. They produce critical components like electrical bus bars, supporting various industrial needs including those for substation equipment. The company ensures quality with in-house tooling and robust process control.
Based in Elk Grove Village, IL, Kenmode Precision Metal Stamping specializes in the manufacturing of busbars and other precision stamped metal components. They work with red metals and aluminum, leveraging partnerships with plastic molders to deliver comprehensive solutions for various industrial applications, including substation equipment.
Lindsey Systems supplies thoughtful solutions for electricity transmission and distribution, enabling utilities to meet grid challenges. They offer a complete range of smart grid sensors for underground and pad-mount switchgear applications, including ring-style current sensors and low energy analog (LEA) sensors for relays. The company also provides advanced conductor monitors and modular emergency restoration systems.
Based in McKinney, TX, Maverick Power designs and manufactures advanced medium voltage solutions for reliable power management. They offer innovative power distribution equipment, including Medium Voltage Switchgear, Low Voltage Distribution panels, Automatic Transfer Switches, and UL508A Control Panels, serving mission-critical industrial and commercial operations.
Based in Babylon, NY, MCI Transformer Corporation specializes in custom and catalog transformer design and magnetic component manufacturing. With 50 years of experience, the company provides fast prototypes and quick turnaround times. Their products are UL, CSA, and TUV-CE certified.
Mitsubishi Electric Power Products, Inc. (MEPPI), based in San Diego, CA, manufactures innovative equipment for North American power systems. They supply critical substation components, including Gas Insulated Switchgear and Vacuum Circuit Breakers. MEPPI also offers power systems consulting, DERMS software, and asset monitoring solutions.
Based in Lake Park, FL, Meta Power Solutions designs, manufactures, and supplies commercial and industrial transformers. Their product range includes single-phase and three-phase pad mount, substation, pole mount, and grounding transformers, along with switchboards and medium voltage switchgear.
MGM Transformers manufactures dry-type and oil-filled transformers for various applications, including data centers, solar installations, and industrial facilities. The company provides power infrastructure solutions for the power grid, emphasizing quality and delivery.
Based in Queensbury, NY, NEPSI manufactures medium-voltage metal-enclosed power capacitor banks and harmonic filter banks. They provide solutions for electric power systems, specializing in power factor correction and harmonic distortion mitigation. The company offers comprehensive application, design, and support for their substation equipment.
Olsun manufactures and supplies a range of transformers, including dry type and electrical transformers, for various applications. Based in Richmond, IL, the company is a US-based provider specializing in essential components for electrical infrastructure and substation equipment.
Based in Canonsburg, PA, Pennsylvania Transformer Technology, LLC designs and manufactures high-performance power transformers from 5 MVA to 750 MVA through 765kV. Operating U.S. facilities, they provide engineered solutions for electric utilities, data centers, renewables, BESS, and industrial applications. The company also offers comprehensive transformer maintenance, repair, and parts support.
Based in Lafayette, LA, Power Temp Systems specializes in the engineering and manufacturing of advanced power distribution systems. The company produces modular docking stations and paralleling panels, essential components for electrical infrastructure, including substations and large-scale power applications, ensuring reliable and efficient power management.
Based in Shreveport, LA, Prolec Energy manufactures a full line of transformer solutions for electrical energy generation, transmission, and distribution. The company also provides comprehensive power transformer service solutions and high/low voltage transformer parts. Prolec operates manufacturing facilities across the Americas, including the United States.
Based in Milpitas, CA, Quality Transformer & Electronics, Inc. engineers and manufactures custom magnetics, electronic assemblies, and power distribution units. They specialize in custom, isolation, and grounding transformers, crucial components for mission-critical electrical applications including substations.
Based in Bakersfield, CA, RESA Power is a switchgear manufacturer specializing in new and re-manufactured low, medium, and high voltage switchgear and electrical distribution equipment. The company provides essential components for substations and power infrastructure, serving industrial and commercial clients.
RITZ USA manufactures and supplies high-voltage units and systems for electric utilities, original equipment manufacturers, and industrial clients. The company provides specialized equipment and integrated solutions crucial for substation applications and broader electrical infrastructure, supporting power transmission and distribution.
Based in Campbell, CA, Ross Engineering Corporation manufactures high voltage electronic and electro-mechanical devices for power utility, industrial, and test applications. Their products include relays, switches, breakers, voltage dividers, and control systems. The company also offers extensive high-voltage calibration capabilities.
Based in Chicago, IL, S&C Electric Company manufactures equipment and services for electric power systems. They design and produce innovative substation and distribution solutions, including IntelliRupter® PulseCloser® fault interrupters and PME Pad-Mounted Gear switchgear, enhancing grid reliability and resilience for utilities.
Siemens Energy produces and services large power transformers, expanding its manufacturing footprint in North Carolina for the growing U.S. market. The company focuses on strengthening the power grid by providing essential equipment for energy infrastructure projects.
Smart Wires provides grid enhancing technologies, including its SmartValve solution, to electric utilities. The company helps manage power flows, reduce congestion, and increase capacity on existing transmission assets. Their solutions support operational flexibility and integrate clean energy.
Based in Mountainside, NJ, Snap Action Inc. manufactures circuit breakers, including miniature, ATO, and Maxi fuse replacements. Since 1977, they provide permanent circuit protection solutions, offering automatic, manual, and remote reset thermal circuit breakers made entirely with USA-sourced materials.
Based in Oxnard, CA, Sparkstone Electrical Group provides custom low- and medium-voltage power distribution and control solutions. They offer comprehensive engineering, design, and manufacturing services for critical electrical infrastructure, serving utilities, renewables, and industrial sectors with reliable power management equipment.
Based in Pasadena, TX, Spike Electric Controls manufactures custom-engineered low and medium voltage electrical equipment, including switchgear, panel boards, and power distribution systems up to 38kV. They provide UL-certified solutions for industrial applications, serving sectors like refineries with robust electrical infrastructure.
Based in Palo Alto, CA, Stangenes Industries, Inc. manufactures custom high voltage systems and electromagnetic components. The company specializes in current transformers, including wideband and pulse types, for demanding applications. They also produce pulse transformers, electromagnets, and power supplies, focusing on precise electrical energy solutions.
Based in Temple, TX, Sunbelt Solomon is an electrical transformer company providing reliable solutions for various transformer needs. They offer comprehensive, configured solutions for utility, industrial, and commercial applications, supported by their engineering capabilities and dedication to quality products.
Based in San Diego, CA, Tecate Group manufactures high-quality electronic components and custom power solutions, including ultracapacitors and lithium-ion capacitors. They specialize in modular product solutions for diverse markets such as Smart Grid, industrial, and transportation applications, simplifying complex energy-storage requirements with their technical expertise.
Based in Waynesboro, GA, TMC Transformers USA Inc. manufactures dry-type medium and low voltage transformers. They specialize in VPI and epoxy shielded windings, producing transformers and reactors with powers up to 25MVA and insulation levels up to 46kV. Serving diverse sectors including utilities, industrial, and power generation.
Based in San Leandro, CA, Trayer Engineering Corporation manufactures quality electrical distribution and medium voltage switchgear. Since 1962, they specialize in robust substation equipment including submersible, padmount, solid dielectric, and vacuum switchgear. All products are proudly assembled in the USA for reliable power systems.
Based in Perris, CA, Triad Magnetics is a manufacturer of a wide range of transformers and magnetic components. The company produces standard and custom power, current sense, control, and toroidal transformers in its US facility for various industrial and power supply applications, including those suitable for substations.
Virginia Transformer Corp manufactures custom power transformers with over five decades of experience. They produce reliable, long-lasting transformers using advanced technology, serving diverse markets including utilities, renewables, and data centers. The US-owned company emphasizes shortest industry lead times for its commercial and industrial clients.
Based in Westerville, OH, Vertiv specializes in manufacturing medium and low voltage switchgear solutions for integrated power distribution. The company provides essential equipment for managing and optimizing power flow within substations and other critical infrastructure environments, ensuring continuity and efficiency.
Victor Insulators is a US-based manufacturer specializing in insulators for electrical infrastructure. They produce high-quality silica porcelain and alumina insulators, essential components for substation equipment, transmission, and distribution systems. Serving the utility and industrial sectors, Victor Insulators provides critical components to support power delivery networks.
Mueller Electric, an American manufacturer based in Akron, OH, specializes in electrical components for industrial and utility sectors. The company provides ASTM-F2259-certified utility grounding assemblies and temporary protective grounding equipment. They also produce instrumentation cables, flexible solutions, connectors, and terminals.
Based in Mooresville, NC, DEHN, Inc. specializes in manufacturing advanced lightning and surge protection systems. Since 1910, the company has provided customized solutions, including various types of surge arresters and combined arrester modules, ensuring the safe operation of critical electrical installations and infrastructure like substations.
nVent manufactures electrical solutions for energy distribution, including medium voltage switchgear crucial for substations. The company provides essential components such as electrical enclosures, grounding, bonding, lightning protection, and connectors through its diverse brands, serving industrial and commercial infrastructure.
Sensata Technologies engineers and manufactures advanced sensing, electrical protection, control, and power management solutions. They specialize in high-voltage relays and other critical components essential for electrical substations. Leveraging decades of experience, Sensata provides robust and reliable products for industrial applications to a global customer base.
Based in Plymouth, MN, American Midwest Power manufactures standard and custom electrical distribution equipment. They provide medium voltage equipment, Marina Substations, busway, metering cabinets, disconnects, and enclosures. The company serves various industrial and commercial electrical distribution requirements with their manufacturing capabilities.
Birmingham Control Systems designs and manufactures substation control panels, control buildings, and industrial control panels. They provide solutions to protect, monitor, and control electrical distribution and utility equipment. The company also offers relay control panels, utilizing microprocessor-controlled relays, and provides PLC programming and HMI services.
Crown Technical Systems designs and manufactures power distribution products including protective enclosures, relay panels, and switchgear. They integrate solutions for utilities, data centers, renewables, industrial, and transport sectors, specializing in protective enclosures for traction power substations, ensuring a safe and dependable electrical grid.
CSI Technologies, Inc. manufactures high voltage capacitors, ranging from 500 to 250,000 volts. Founded in 1969, the company specializes in pulse power and high energy density designs for long-life applications, providing custom solutions for various industrial needs, including those for substations.
Elgin Power Solutions manufactures factory-built and mobile substations, high-voltage EPC solutions, and custom switchgear in the USA. Based in Beaver, WV, the company designs, builds, and tests electrical systems and power quality products for industrial, renewable, and utility markets, offering comprehensive field services.
Based in Fort Mill, SC, MacLean Power Systems manufactures a wide range of essential products for the electric utility power infrastructure. The company specializes in producing equipment and components crucial for substation construction, maintenance, and operation. They serve customers maintaining electrical grid integrity worldwide.
Meiden America Switchgear, Inc. manufactures high-performance vacuum interrupters and dry air insulated dead tank vacuum circuit breakers. Based in Gray Court, SC, the company specializes in SF₆-free, zero-emission substation equipment, leveraging pioneering vacuum technology for reliable, low-maintenance solutions.
Myers Power Products designs and manufactures custom-engineered medium voltage power distribution solutions, including traction power substations, power distribution centers, and switchgear. Based in Lakewood, WA, the company serves diverse industries, notably having manufactured the largest prefabricated traction power substation in the United States for LIRR.
Based in Virginia Beach, VA, NGK-Locke Inc. manufactures polymer and porcelain insulators specifically designed for transmission line and substation applications. The company leverages its own plant capabilities to produce critical components essential for electrical infrastructure.
Power Grid Components, Inc., based in Brooklyn, NY, manufactures critical substation equipment components. Through its brands, it produces instrument transformers, medium-voltage oil-filled transformers, insulators, and disconnect switches. The company provides tailored solutions to utilities, OEMs, and distributors, enhancing the power grid's capacity, resilience, and safety with reliable products.
Based in St. Paul, MN, Quality Tool specializes in manufacturing custom copper and aluminum busbars, essential for substation equipment. Capabilities include fabrication, lamination, coating, insulating, stampings, sheet metal fabrication, and CNC machining. They serve industrial, medical, specialty electronics, and defense sectors with ISO 9001:2015 certified processes.
Southern States LLC manufactures high-voltage disconnect switches, providing proven reliability and performance. Their product range includes vertical break, center break, double-end break, bypass, ground, hookstick, phase-over-phase, and unitized switches, along with CapSwitcher™ and power switching & protection solutions.
Based in Winneconne, WI, Switchgear Power Systems manufactures custom electrical switchgear and power distribution equipment. They offer metal-clad, metal-enclosed, and pad-mount switchgear, along with power distribution centers, fused sectionalizers, and primary metering equipment. The company provides bespoke solutions for global power infrastructure.
WEG Transformers USA, based in Washington, MO, manufactures distribution and power transformers. Specializing in three-phase, liquid-filled units, they serve utility, industrial, and renewable energy markets. Their capabilities include power transformers up to 350 MVA and 161kV, and distribution transformers up to 10MVA.
Hammond Power Solutions manufactures dry-type transformers for substation applications in North America. They engineer and produce a wide range of standard and custom transformers, including EV charging distribution, smart, and general-purpose encapsulated models. The company also provides motor protection filters and power quality solutions.
Based in Dyersburg, TN, ERMCO Distribution Transformers is a US manufacturer specializing in oil-filled distribution transformers and related components. The company provides customized solutions, producing essential equipment for electrical substations and industrial applications. ERMCO is certified to ISO 9001:2015 standards for quality.
G&W Electric engineers and manufactures advanced automation, distribution, and switchgear solutions crucial for future-ready power grids. The company provides equipment for substation infrastructure, enhancing power delivery and transforming communities with reliable electrical systems and integrated solutions.
Hubbell Incorporated provides trusted solutions for critical infrastructure, manufacturing a broad line of substation equipment. Their products are designed for diverse applications, including specialized offerings capable of withstanding seismic events, serving the electrical utility and industrial sectors.
IEM provides custom power distribution systems, leveraging over 75 years of experience in planning, producing, and deploying solutions. The company offers advanced manufacturing capabilities at scale, serving critical sectors including energy, utilities, infrastructure, and technology.
Schneider Electric USA manufactures a comprehensive range of medium voltage (MV) switchgear, offering solutions with air, gas, or shielded solid insulation technologies. Their product line includes robust Metal-clad and Metal-enclosed MV systems, critical components for electrical substations and power distribution infrastructure.
Siemens US manufactures a comprehensive portfolio for medium-voltage power distribution, providing essential equipment for smart grids and substation infrastructure. The company focuses on enabling economical and responsible electrical power usage through its advanced industrial solutions, including digital twin technology for system optimization.
Mersen, based in Bay City, MI, is an expert in electrical power and advanced materials. The company designs and manufactures custom laminated bus bars, vital components for electrical power systems. Mersen directly supports substation equipment manufacturers with advanced R&D and production capabilities.
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How to Choose a Company
- Verify the manufacturer's demonstrated capability to meet specific ANSI/IEEE standards (e.g., C37 for switchgear, C57 for transformers) and NEMA enclosure ratings required for your application's BIL (Basic Impulse Level) and short-circuit withstand requirements, not just general claims of compliance.
- Insist on a detailed breakdown of their in-house testing facilities and procedures, especially for high-voltage dielectric tests, temperature rise tests, and partial discharge measurements. A red flag is a manufacturer relying solely on third-party labs without robust internal quality control or clearly documented test reports with traceable calibration.
- Assess their expertise in SCADA and substation automation integration, specifically inquiring about their proficiency with common communication protocols like IEC 61850 or DNP3 and their ability to provide intelligent electronic devices (IEDs) that are natively compatible with your existing control systems.
- Beyond initial procurement, evaluate their long-term spare parts availability, warranty provisions, and post-installation technical support for critical components like power transformers or SF6 circuit breakers, as operational continuity is paramount and specialized spares often have long lead times.
Frequently Asked Questions
What critical data or documentation should I require from a substation equipment manufacturer during project handover?
Beyond typical O&M manuals, insist on comprehensive Factory Acceptance Test (FAT) reports, Type Test certificates for design verification, certified "as-built" drawings including Single Line Diagrams (SLDs) and wiring schematics, full equipment ratings and nameplate details, material certifications (especially for critical components like transformer core steel or conductor materials), and a detailed spare parts list with recommended inventory levels. For transformers, oil analysis reports and dissolved gas analysis (DGA) baselines are crucial.
How do I assess a substation equipment manufacturer's readiness for SCADA integration and substation automation?
Evaluate their experience with specific communication protocols (e.g., IEC 61850, DNP3, Modbus TCP), their portfolio of intelligent electronic devices (IEDs) like protective relays and RTUs, and their ability to provide comprehensive configuration files and human-machine interface (HMI) screen development. Request case studies or references where they've successfully integrated their equipment into complex SCADA environments and inquire about their cybersecurity protocols for networked devices.
What are the critical factory acceptance tests (FAT) I should insist on for major substation components like power transformers or HV switchgear?
For power transformers, critical FATs include routine tests like winding resistance, turns ratio, insulation resistance, no-load and load losses, impedance voltage, and dielectric withstand tests. For HV/MV switchgear, critical tests involve power frequency withstand, impulse withstand, insulation resistance, contact resistance, and functional checks of interlocks, control circuits, and protective relays. Always verify test equipment calibration and insist on witnessing these tests, or at minimum, receiving detailed, signed reports.