- A. Damiano & Company - Manufacturers and exporters of transmission and distribution materials.
- AAA Acme General Electrical - Distributor of power transformers including Acme and GE.
- Allbro Industries - Manufacturers insulation products for electrical switchgear and distribution transformers.
- Alstom T&D Protection & Control - Manufacture of protection, control, recording and monitoring systems for electrical transmission and distribution networks.
- Andrew Yule and Company - Supply, erection, testing and commissioning of all power equipment, indoor, outdoor HT/LT switchgears, transformers upto 132/220 KV, voltage regulators, capacitors and switches.
- Applied Precision Ltd - Research, development and production of measuring devices for the electricity distribution industry . Products include automated test equipment for electricity meters, power analyzers and coulometry .
- APT Power Technologies - Manufacturers transient, metering, feeder relays, fault disturbance recorders and monitoring equipment for the power industry.
- Avator Technology - Manufacture products related power transmission such as organic insulator for high-tension transmission and high voltage cables. From Argentina.
- AVO Power Services, Inc. - Field service on power transformers and circuit breakes. Including: testing, assembling, oil processing and leak repair.
- B&B Transformer, Inc. - Remanufacture, recondition, repair of distribution transformers.
- Bitronics, Inc. - Manufactures substation electrical measurement instruments. Online line card and PDF application notes for download. Technical literature requires prior registration.
- Brooks Manufacturing Company - Manufacturers distribution crossarms and transmission structure framing.
- Cam Tran Transformers - Manufacturer and refurbish oil-filled distribution transformers for global utility/power corporations, and contractor/developers.
- Cardinal Pumps - Manufacturer of transformer oil valves, transfer oil pumps for transformers and re-manufactured pumps.
- Carling Technologies - Manufacturer of hydraulic/magnetic circuit breakers, electrical switches and power distribution centers for appliance, computer, marine, medical, office automation, power supply, telecommunications, transportation and HVAC applications.
- CEE DEE Vacuum Equipment Pvt. Ltd. Incorporated - Manufacuture of oil filtration and purification equipment. From India.
- COMEM S.p.a. - Manufacturer of epoxy resin components, accessories for oil insulated transformers, for distribution and power transformers. From Italy.
- Critter Guard Inc. - Protect substations, transformers, and poles from squirrel caused power outages.
- Crossarm, Inc. - Manufacturers of composite polymer products for the power distribution industry.
- DAE Instruments - Developer and manufacturer of industrial electronic systems for electrical switchgear, specializing in metering, protection and control for the energy service industry.
- Dakota Transformer - Distribution transformers, high voltage transformers, single - three phase power transformers, transformer repair, buy and sell.
- Davico Industrial - Manufacture and cable ties, flexible conduit and fittings, terminal connectors.
- Dow Corning Electrical - Manufacturers silicone rubber, fluids, lubricants and sealants for electrical power applications.
- Eco Electrical Systems, Inc. - Manufacture of products that help prevent raptors, eagles, hawks, and animals from being electrocuted on high voltage power circuits.
- Edison Controls F.C.I - Manufacture a variety of products designed to indicate or locate faults on electrical utilities overhead or underground distribution circuits.
- Elbi - Manufacturer of substations, disconnectors, silicone rubber insulators and surge arresters. From Yugoslavia.
- ELCO Industries Ltd - Medium and large power transformers and mobile substations. Transformers from 10 mva to 800 mva and 69 kv to 500 kv. Mobile substations - to 230 KV and to 50+ MVA.
- Electric Power, Inc. - Electrical testing, custom switchgear, generator controls, coordination studies, infrared surveys, power system and substation maintenance.
- The Electric Service Company - Emergency transformer replacement specialists. Manufacture new and rewind used transformers for high power applications.
- Electro Industries - Manufacturers power monitoring, advanced power quality, revenue metering, substation data acquisition and control that is web based.
- Electro Mechanic Equipment Ltd. - Belgian manufacturer of medium voltage switchgear such as circuitbreakers, load switches and isolators, and related products: fuses, insulators, security equipment and power factor correction equipment.
- Electronic Lineman - Offers online programs that are easy to use electrical, static and dynamic calculators, plus definitions for the operational and construction field lineman.
- ELMEK - Manufacturer of oil immersed and power transformer accessories; tap changer bushing, oil level indicator, relays and thermometers. From Turkey.
- Emco Transformers Ltd. - Manufactures transformers, meters and SCADA products. Online line card, capability statement and PDF data sheets available for download.
- Engidesa - Manufacturer of operating position indicators for power transformers equipped with OLTC´s.
- EquiSales Associates Inc. - Circuit breakers, transformers, power generation equipment and switch yards. Sales, installation and maintenance, new and refurbished equipment.
- FKI Energy Technologies - Manufacturer of equipment for the generation, transmission and distribution of electrical power. Includes generating machines, transformer, motor and switchgear.
- Frank Lill and Son Inc - Power plant installs, boiler, turbines, cogeneration, heat recovery steam generator.
- Fusegear Electric Ltd. - An iso company producing low and high voltage fusegear and switchgear, high tension fuses, vcb, load break switches for all applications.
- GE Syprotec - Gas in oil sensors for monitoring, diagnostics and optimization of transformer performance within substations. Products include the Hydran, Faraday TMCS and TNU and dissolved gas analysis DGA lab services.
- GR Electrical Service, Inc. - Manufacturer of custom built switchgear, motor control panels, distribution boards and switchgear.
- Hawker Siddeley Switchgear - Manufacturers of distribution switchgear for a variety of applications.
- HICO America Sales and Technology, Inc. - Manufactures power transformers at voltages up to 765 kV and ratings to 2,000 MVA/bank.
- HPL Group - Manufacturers of electrical switchgear, metering and energy management equipment. From India.
- HSP Hochspannungsgeraete Porz GmbH - Manufacturer of high voltage bushings and high voltage capacitors.
- IMS - Manufacturer of electronic kilowatt-hour meters for use in sub-metering multiple unit facilities.
- IMS Meters - Manufacturer of electronic kilowatt-hour meters used for sub-metering electricity in multiple unit facilities such as marinas and apartments.
- Indisol Insulators - Makes electrical insulators in epoxy resin for up to 36 kV, includes low and medium tension insulators, bushings and capacitive voltage detection systems.
- Jjohnson & Phillips Limited - Manufacturer of electrical distribution switchgear, transformers, sf-6 ring main units, vacuum circuit breakers and sub-stations. From Pakistan.
- Joslyn Hi Voltage Corp. - Global supplier of power transmission and distribution equipment, substation and transmission equipment, featuring Fisher Pierce products.
- K - Tech, Inc. - Electrical meters designed for deregulation. Capable of being both the billing meter and giving the customer access to billing data and power quality. Also analog and digital panel meters, transformers and transducers.
- KEC International - Design manufacture and construction of turnkey projects for power transmission - voltages up to 800 kv.
- Keweenaw Power Systems, Inc. - Provide electrical power quality monitoring and analysis combining engineering, project management, and practical experience to design reliable power and control systems.
- Keystone Electrical Manufacturer Co. - Manufacture of protection and control switchboards and switchgear as well as power delivery accessory equipment including control buildings and mobile substations.
- Korona Messtechnik AG - Inspection method for the detection of high voltage transmission lines.
- Kotsons Transformers - Manufacturer of power and distribution transformers, single phase, pole and pad mounted and custom designed manufacturing facility.
- Kuhlman Electric Corporation - Manufactures a complete line of distribution, power and instrument transformers for electrical utilities and other commercial users of electric energy.
- Kwang Myung Electric Engineering Co., Ltd. - Manufacturer of low and medium voltage switchgear, protective relays and outdoor distribution equipment.
- Larsen and Toubro Ltd. - Electrical and Electronics Division - Makers of switchgear products, metering and protection systems, medical equipment, petroleum dispensing pumps, control and automation systems.
- L.C. Switchgear Ltd - Industrial switchgear, switchgear enclosures, fuses, contactors, control panels.
- L.K.Consultants - Consultancy, design and installation services for electric power systems. Thane, India.
- Mahashakti Conductors Pvt.Ltd. - Manufacturer of stock transformers and customer specifications in the power range 132kVA to 5000KVA. From India.
- Mardix - Packaged substations, LV switchgear.
- Marsons Electricals Industries - Marsons Electricals Industries are manufacturers of power transformers and distribution transformers. From India.
- Mediterranean Power Electric Ltd. - Manufacturing of switchgear for low voltage, medium voltage, distribution boards, street lighting equipment and power distribution.
- M&I Materials Ltd - Produces Midel an environmentally friendly, fire resistant, readily biodegradable, synthetic transformer oil.
- Midwest Electrical Testing - Provides complete field services, maintain, inspect and test electrical power distribution equipment and system transformers, breakers, switchgear, relays and buses.
- Mileen Enterprises - Manufacturers of power distribution transformer, bushing metal parts, pressure relief valve From India.
- M&l Manufacturing Ltd. - Manufactures custom built switchgear and control panels.
- Morpac Indistries, Inc. - Manufacturer for the electric utility industry. High voltage electrical switches, line stringing equipment, off road crawlers, stored energy operators and electric valve actuators.
- M/s. Khare Elec-Trans - Manufacture and repair of transformers. From India.
- MVA Power Inc. - Specialised in detail design, manufacturing and supply of substation, tansmission lines and distributions lines for medium and high voltage.
- Narindra Electricals - Manufacturers of distribution and power transformers for rating upto 5000kva and servo voltage stablizers for rating upto 2000kva capacity.
- National Traders - Manufacturers of electrical and overhead line materials.
- Neo - Manufacture of equipment for electrical distribution and transmission networks. From Yugoslavia.
- Neo Electrical Equipment - Producers of equipment for electric-energy distribution and transmission networks including insulators, surge arresters, switchgear, fuse bases and transformer substations. From Yugoslavia.
- Nu-Lec Industries Pty Ltd. - Specialises in the manufacture of medium voltage switchgear and the engineering of automation solutions.
- Ofil Ltd. - DayCor camera, solar blind imager for inspection of corona and partial discharges on high voltage lines and insulators, fire and flame detection under full daylight conditions.
- OHMIC Controls Pty Ltd - Manufactures short time, high current rating resistors for neutral earthing, resistance starting, harmonic filters, load banks and damping resistors, at high voltage and insulation levels.
- Olds and Baker, Inc. - Specializes in transformer maintenance and oil processing services for utility companies in the western portion of the United States.
- P M Electronics - Manufacturer and exporters of world class power and distribution transformers. From India.
- Pacs Industries - Switchgear manufacturer of circuit breakers designed for generators, substations, transformers and power plants.
- Patton and Cooke Co. - Manufacturers of high voltage couplers and connectors.
- Petroflex, NA, Inc. - Manufactures high density polyethylene conduit, secondary electrical pedestals, composite crossarms, insulators, and accessories for the power utilities.
- Pingdingshan Tianying Group Co., Ltd. - Manufacturing high and ultra-high voltage switchgear equipment in China.
- Plastic Dip Moldings, Inc. - Manufacture of wildlife outage protectors for substations and power lines.
- Point Eight Power, Inc. - Manufacturer of custom switchgear for the offshore oil and gas market, marine, gasoline service stations, petrochemical and military applications.
- Power Measurement Ltd. - Power meters for power, energy and power quality monitoring.
- Power Technologies Inc. - Power system analysis, including consulting services, instrumentation, and software products.
- Powergear Limited - Manufactures for IPB's and generator terminal enclosure for clients both in India and the USA.
- Precision Trans-Elect Industries - Manufacturer of overhead line material, medium voltage switchgears and transmission hardware.
- Programma Electric ms - Develops, manufactures and markets test equipment and measuring instruments for the electrical power and telecom industry.
- PT. Asata Utama Electrical Industries. - Manufacturer of oil immersed transformer with highest voltage of 36 kv and maximum capacity is 10 mva. From Indonesia .
- Quality Transformer and Electronics - Provide high quality and reliability transformers, power supplies and power distribution systems.
- Quick Industries, LLC. | - Manufacturer of simple mechanical devices that directly attach to pole-mounted equipment and make switching operations a simple task.
- Racsan's Technologies - Manufacturers of high voltage stabilizers, power transformers, automatic voltage regulators, ups, cvt, isolation transformer, inverter and LT control panel.
- Reliable Power Meters - Manufacture of power monitoring and data management equipment as well as predictive maintenance software.
- Remote Monitoring Systems Inc - Manufacturers underground cable fault technologies, and offers a range of products and services to improve system reliability.
- Rowsons Transformers Pvt. Ltd. - Manufacturer of high voltage power transformers, oil cooled voltage stabilizer, switch gears and automatic voltage controller from India.
- Rse-Sierra, - Manufacturer of quality metal clad and metal enclosed switchgear, low voltage switchboards, commercial panelboards and motor control centers.
- Schneider Electric Canada - Switchgear equipment and transformers, switchboards, programmable logic controllers, human machine interfaces, software, motion control servo drives, variable speed drives, energy management systems, ground fault and motor protection relays, emergency stopping devices, motor starters, and surge suppressors.
- SD Myers - Provides information and services to minimize unplanned outages and extend the life of transformers.
- Sediver - Manufacturer of insulators for transmission distribution lines, surge arresters and hollow cores.
- Sedvier Inc. - Manufacturer of composite and glass insulators for transmission and distribution lines, surge arresters and hollow cores.
- SensorLink - Develops and manufactures high voltage sensing instruments for the power utility industry including hotstick or line mounted amp, volt, ohm meters, temperature and power quality meters.
- Serveron - Turnkey substation transformer monitoring for reliability of transmission and distribution equipment.
- Siemens Power Transmission & Distribution Inc. - Manufactures power transmission and distribution equipment and energy service solutions for electric utilities power producers.
- Silidriel - Offers and descrbibes silicone coatings and devices to avoid high voltage insulator failures, particularly in high pollution zones.
- SMIT Transformers - Manufactures power transformers with capability ranges up to 1000 MVA units with voltages up to BIL 1550 kV.
- SNEMO - Substation monitoring and data management. Located in Quebec, site is in both French and English.
- Southern Transformer, Inc. - Offers dry type transformers for harsh environments and PCB direct replacements to specifications.
- Square D Company - Electrical control and distribution equipment company.
- S&S Power Switchgear - Indian manufacturers and exporters of switchgear, vacuum circuit breakers, disconnectors, auto-reclosers, breakers, and ht and lt fuses.
- STL Stewart Transformers. - Manufacturers of wound components up to 2.5MVA 33kV, including oil filled power, cast resin transformers, reactors and arc suppression coils. From UK.
- Stroud Switchgear Ltd - Stroud Switchgear designs, manufactures,modifies and repairs switchgear and control panels.
- Substation Products Corporation - Substation supplier of structures and electrical equipment. Specialize in tube, beam, and lattice type structures.
- Sunten - Dry-type transformer, dry-type reactor, small combined-type electric substation, combined-type transformer, and oil-filled transformers. From China.
- Systems Engineering and Sales Co, Inc. - Manufactures stationary and mobile transformer oil purification equipment.
- T & R Electric - Distributor of new, rewound and reconditioned power and distribution transformers, voltage regulators and switchgear.
- Technical Services Diagnostics Inc. - Providing testing, startup and maintenance support to the utility and industrial markets.
- Tesla Transformers Ltd. - Manufacturers of distribution transformers, power transformers, unitized substations. From India.
- TestSwitch - Space-saving switch for control and testing of power generation and distribution systems.
- Toprank Corp. - Transmission and distribution substation equipment in Malaysia.
- Trafomaterials - Supplies monitoring equipment for the protection of transformers and bushings and components for power distribution transformers.
- Trans Field Electric - Manufacturers of transformers, resin cast, metering sets, potential transformers, oil cooled. From India.
- Transelectric AB - Planned, built and supplied materials for installations in 70 countries for rural electrification.
- Transpower - Manufactures transformers and switchgear. From India.
- Tucson Transformer and Apparatus - Manufacture of power distribution equipment and high voltage equipment for use in electrical power distribution systems.
- Tunisie Transformers - Oil filled, cast resin, single, three phases, pole and pad mounted transformers. From Tunisie.
- Ultimate Engineering Technique - Manufacturing of distribution transformer components, such as steel fabricated and precision machined parts.
- UTEC - Electronic test and calibration equipment for the electric utility companies.
- Utility Relay Company - Circuit breaker trip unit conversion kits for industrial switchgear.
- Utta Electricals Pvt. Limited. - Manufacturer of power distribution transformers from 16 KVA to 10000 KVA up to 11-22-33 KV class.
- VA TECH - Reyrolle ACP Limited - Manufacturer of protection and control equipment for the electricity industries around the world.
- The Valley Group, Inc. - Transmission line monitoring equipment.
- Viat Instruments Pvt.Lld. - Manufacture pressure relief devices, throttle valves and dehydrating silicagel breathers for power transformers.
- Voltamp Transformers Limited - Manufacturer of oil filled and dry type power and distribution transformers for generation, transmission and distribution of electrical energy.
- Whipp and Bourne - Manufacturers of distribution switchgear for a variety of applications. Products include a range of DC circuit breakers, switchgear and auto reclosers. Marine applications prominent.
- Woodhead Industries, Inc. - Primarily engaged in the manufacture of devices for the control and distribution of electrical power for industry.
- WT Henley - Manufactures an extensive range of electrical equipment used throughout electrical supply distribution networks, from sub-station to the consumer.
- Zenith Controls, Inc. - Design, manufacture and marketing of power switching systems and controls.
- Zhejiang Power Transmission and Transformation Corporation - Building ultrahigh voltage power transmission and transformation products. From China.
- ZIV - Manufactureing of digital protection, control, metering, and communications, products for substations, power lines, and electrical power machines.
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