- ABB Group (1)
 Adept Power Solutions
 - U.K. power protection specialist providing uninterruptible power supplies, generators, bypass switches, UPS batteries, and more.- Advanced Testing Systems, Inc.
- Can provide load studies or a complete facility maintenance testing programme.
- Alstom
- Provides components, systems, and services for the energy, transportation, industrial systems, marine, and contracting markets.
- Altrans Supply
- Provides custom power supply designs and transformer engineering.
- American Environmental International, Inc.
- Air pollution control systems and solvent recovery systems for industrial applications. Also developing electricity/steam cogeneration technologies.
- American Superconductor Corp. (1)
- Applied Power Technologies
- Provides advanced energy metering and power monitoring equipment, software, and services.
- AVO Electrical Power Engineering
- Offers power studies/system analysis required for compliance with OSHA, NEC, NESC, and NFPA 70E. Engineering services available throughout the U.S.A.
- Beckwith Electric Co. Inc.
- Offers products and services for generation, transmission, and distribution of electric power.
- Besicorp Group (1)
- Bharat Heavy Electricals Limited ( BHEL)@
- Cannon Technologies, Inc
- Specialises in the development of software and systems for electric utility remote metering, substation automation, and load management.
- Centrax Ltd.
- Designing and manufacturing gas turbine driven generator sets, specialising in cogeneration/CHP applications, and machined components and assemblies.
- Cleveland Tube Innovations
- Heat exchanger and condenser restoration systems, mechanical and chemical tube scrubbing, tube sleeving, full length tube liners and tubesheet restoration.
- Commonwealth Associates, Inc.
- Specialises in services related to the transmission of electrical energy.
- Composite Power Corporation
- Produces an environmentally friendly energy delivery system, for use by the electric utility industry.
- Consolidated Restoration Systems, Inc.
- Deals with tube inserts and liners, heat exchanger cleaning, bundle fabrication and coating systems.
- Coordinated Power Engineering
- Specialises in power distribution engineering including short-circuit and coordination studies, power quality analysis, and power factor studies.
- Crompton Greaves
- Offers power systems, industrial, digital, and consumer products and services.
- CTI Industries
- Steam condenser and heat exchanger tube restoration including tube inserts (ferrules and sleeving), full length tube liners, retubing, hydraulic expansion, expanders, cleaning and inspections.
- Cummins Power Generation
- Designs, sells, and services integrated power generation systems, commercial generator sets, transfer switches, paralleling switchgear, and controls.
- Davis Energy Group, Inc.
- Specialising in energy analysis, product development, monitoring, communications, and mechanical design.
- DC Fabricators, Inc.
- Supplying design and manufacturing technology for steam condensers and heat exchangers for marine and power generation.
- DCG/EPRI EMTP96
- Maintenance, marketing, assistance and users group activities.
- Diversified Technlogies, Inc. (DTI)
- Develops advanced technologies and products through a wide range of consulting projects.
- DYNEX
- Offering transformer/switchgear and power distribution services, and disposal of PCB containing equipment.
- E Squared Power Systems - Lakewood, CO
- Ekstrom Industries
- Manufacturer of electric metering equipment such as meter socket adapters, tamper resistant covers, sealing rings and jumper covers.
- Electric Power Research Institute (2)
- Electricity Forum, The
- Comprehensive information resources for North America's electrical industry personnel, including power policies and technologies, news, events, Electricity Today magazine, books, and product directory.
- Electro-Optical Products Corporation
- Electro-Test, Inc. (ETI)
- Independent electrical testing and engineering services company offering training, energy services, and NRTL laboratory services.
- Elektro Bau AG
- Supplier of services for complete electrotechnical and electronic systems, with hardware-independent, custom-made solutions.
- Elektromatik Power Generation AB
- Swedish manufacturer of generating sets.
- Elgin B. Robertson, Inc.
- Manufacturer's sales representatives for the power and communications industry.
- Emerson Network Power
- Manufacturer of ac-dc power supplies and dc-dc converters.
- Energopetrol
- Build electric lines, transformer posts, and electric installations for the Romanian power and energy industry.
- Enertek
- Siver-zinc, lithium, nickel-cadmium, nickel-metal hydride, nickel-zinc, lithium-ion, and aluminium air battery development and manufacturing.
- F.G. Wilson Generator Sets
- Manufacturer of gas and diesel generator sets covering a comprehensive range to support power needs.
- Foster Steam Turbine Consultants Ltd.
- Engineering resource for the owners and operators of power generation and industrial application turbomachinery.
- Frazer-Nash Research Limited
- Designs electric vehicles and microelectronic products.
- Gausman & Moore Associates, Inc
- Specialising in mechanical, electrical and lighting design services.
- GDS Associates
- Gentec
- Groupe SAEI
- Offers products and services which provide energy conversion and global electrical engineering and security solutions.
- HMA Power Systems, B.V.
- Provides electrical system solutions for power generation, propulsion, and drives, based on rotating machines and variable speed drives.
- Hydrowest Group, Inc.
- Products and services for small to medium hydroelectric projects, turnkey construction, and refurbishment of existing projects.
- ICW Power
- Mission critical system integrators of MV and LV electrical power, standby generation, switchgear, UPS and cooling systems for large Internet data centres.
- Industrial and Power Association
- Represents major industrial and power companies based in Scotland.
- Institute of Power Studies and Design
- Serves and assists the electric power industry with studies and design projects.
- Integrated Power Resources
- Offers installation and maintenance services for new and used steam turbines, gas turbines, diesel generator sets, data centre equipment, and other related requirements.
- Interstates Companies
- Services in industrial electrical construction, electrical engineering, and instrumentation.
- Inverpower Controls LTD.
- Designs and manufactures power conditioning products for power electronics, controls, and electro-magnets.
- IRG Power Systems
- Manufacturer of components for electrical power systems such as generators, electric motors, transformers, locomotives, and related equipment.
- Iris Power Engineering
- Motor and generator diagnostic equipment for predictive maintenance applications.
- Karta Technology Incorporated
- Specialises in providing engineering support to electric power utilities.
- Keweenaw Power Systems, Inc.
- Offering power quality services, including site surveys, harmonic studies, and on-call trouble shooting.
- Magnavolt Technologies, Inc.
- Low voltage(0-65V), high current(0-10,000A) power sources for superconducting magnets.
- MET Electrical Testing Company, Inc.
- Provides electrical testing of circuit breakers, substations, switchgear, transformers, and generators and performs power quality surveys, coordination and short circuit studies.
- MIRUS International Inc.
- Designs, develops, and manufactures power quality products, specialising in harmonic mitigating transformers.
- Morpac Industries, Inc.
- Manufactures specialised equipment for the electric utility and electric valve actuator markets.
- MTE Corporation
- Solutions to harmonic distortion, voltage distortion, transients, radio frequency interference, surges and other power system problems.
- Nationwide Electrical Testing (NET)
- Electrical power systems maintenance and testing services.
- Nix Electric
- Specialising in sales of new and rebuilt electric transformers.
- Nova Scotia Power Services Ltd.
- Integrated energy services company which designs, implements and invests in cost-effective projects and provides consulting services for local and international clients.
- Pars Switch Company
- Manufacturer of medium and high voltage circuit breakers and disconnectors.
- Penn Line Service
- Services include: utility line clearance, right-of-way clearing and maintenance; reclamation, landscaping and installation of fence, guard rail and road signs.
- Phaseco Inc.
- Providing design, engineering, equipment and installation services for power factor correction capacitor, and harmonic filter systems.
- Phasor Corporation
- Offering emergency power and UPS systems, computer network design and installation, and power quality analysis.
- Piller (UK) Ltd
- Supplier of uninterruptible power systems to companies worldwide.
- Piller, Inc. (1)
- Power Engineering International Magazine
- Power generation, transmission, and Power-Gen Conference updates worldwide.
- Power Paper
- Kibbutz-based makers of a patented, flexible, non-toxic, open battery, that requires no casing to hold battery chemicals. It can be printed, pasted, or laminated onto paper, plastic and other media.
- Power Superconductor Applications Corp.
- Manufacturer of linear induction and catapult motors, and fault limiters.
- Power Technologies, Inc.
- Independent analytical engineering company serving the global electric power industry
- Powerserve Technologies
- Providing electrical engineering, construction, and testing services for commercial and industrial power needs.
- PowerSmiths Intl. Corp.
- Manufacturers of harmonic cancellation transformers, power conditioners, power distribution centres and more.
- Powerspan
- Manufacturer of the Arc Snubber filter and developer of clean energy technology including multi-pollutant control for fossil-fueled power plants.
- Primax Technologies
- Specialises in the design and manufacture of emergency AC and DC back-up systems, battery charging equipment and power supplies as well as custom power conversion and energy storage systems.
- Reliant Energy
- Provider of electricity and energy services with a focus on the competitive segments of the power industry in the United States and Western Europe.
- Schorch
- Specialists in electrical drive technology.
- Schweitzer Engineering Labs (SEL)
- Serves the electric power industry worldwide through the design, manufacture, supply, and support of digital protective relays for system protection, control, and monitoring.
- Serveron
- Offers turnkey substation transformer monitoring.
- Siemens Power Transmission and Distribution
- Researches ideas and innovations for power transmission and distribution, provides services for increased efficiency, and creates related products.
- Southeastern Transformer Company
- Repairs and remanufactures pole and pad mount transformers, reclosers, regulators, and sectionalizers.
- Synergy Engineering Ltd
- Specialising in the design, manufacturing and sales of large electrical drive systems and other speciality equipment used primarily in the resource industries.
- TECO Power Services
- Develops, owns, and operates electrical generation facilities for cogeneration and independent power projects.
- Telescada, Inc.
- Design and implement the latest technology in both software and hardware for SCADA and Load Management applications.
- Tetra Engineering
- International engineering firm serving primarily the energy and process industries.
- Thunderbyrd Power Systems, Inc.
- Fully automatic power factor correction systems.
- TLG Services, Inc.
- Decomissioning and decontamination services, nuclear and fossil.
- Trace Technologies
- Designs, manufactures and services commercial,industrial,and utility scale power conversion systems, primarily for advanced energy applications, such as wind and solar.
- Tractebel Energy Engineering
- Specialises in power plant, nuclear, transmission infrastructure, operation/maintenance, and energy systems engineering.
- Trasfor Ltd.
- Design and manufacture of custom dry-type and cast resin electrical tranformers and inductors for industrial, marine, offshore and traction convertors, and power distribution.
- Trayer Engineering Corporation
- Custom manufactures of high and low voltage electrical equipment.
- Turbine Resources Unlimited
- Offers gas and steam turbine repair, industrial coatings, and turbine inspection services.
- Turbine Systems International
- Project management, O&M services, project financing, plant design, and customised training programmes.
- Tuthill Energy Systems: Steam Turbines
- Manufactures single and multi-stage steam turbines meeting application requirements from 50 HP up to 20,000 kWe.
- Ultimate Power Solutions
- Power quality equipment, service and engineering support.
- Universal Solutions, Inc. (USI)
- Sales and service for wireless, wireline, UPS, security, utility, and solar DC power applications.
- Waldron Engineering - Hampton, NH
- Providing technical, management, and development solutions to develop, manage, engineer, build, and operate installations.
- West Virginia Electric Corp.
- Industrial electrical contractor with experience in engineering, automation and installing complex electrical systems.
- Westwood Corporation
- Designs, manufactures, and sells electrical generation and distribution equipment, automated control equipment, marine switchboards and panelboards, automated power control systems, and related hardware.
- Wilson Power Solutions
- U.K. based manufacturers of power and distribution transformers. Also provides switchgear and package substations to U.K. and overseas customers.
- Wood Group
- International energy services company provides a range of engineering, production support, maintenance management and industrial gas turbine overhaul and repair services to the oil and gas, and power generation industries worldwide.
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