T&D Buyer's Guide

Sediver is the pioneer and industry leader in high voltage toughened glass insulation technology for more than 70 years. Our outstanding track record confirms the quality of our products, with 600 million toughened glass insulators in service, on both AC&DC lines, in 150 countries and every climatic condition. In North America, nearly 40M  Sediver glass insulators have been providing reliable service to more than 100 utilities since more than 50 years.

Sediver Research Center has developed state of the art smart solutions for real-time monitoring of leakage current & predictive maintenance. Sediver technical assistance team helps support our  customers by providing T/ line insulation design expertise and testing of aging insulators for end-of-life diagnostics.

Sediver offers a full range of:

• Cap & Pin toughened glass insulators for AC & DC Transmission lines (ANSI & CSA standards), with M&E Ratings up to  200 000 lbs (860 KN).

• Glass suspension insulators for distribution lines 15-69KV,

• RTV coated glass insulators (Sedicoat) for polluted environments.

• Glass Insulators for insulated HV/T-line shield wires.

• Large diameter glass insulators for mitigation of bird droppings on suspension strings.

Testing facilities in the USA

Sediver's West Memphis laboratory regularly performs such work, providing US utilities with clear factual diagnostics.

• State-of-the-art testing equipment

• Sediver’s unique expertise in the evaluation of the results

• Full support from Sediver’s extensive R&D Team

• Experience with complex case studies for refurbishment/upgrades of AC and DC lines

Tallman Equipment is an employee-owned company and has served the electrical transmission and distribution industry for over 70 years. We offer a comprehensive range of services to linemen, including new tool sales, rentals, ground and jumper set manufacturing, transformer sling production, and expert testing and repair.  

Tallman carries a wide selection of the best tools and equipment from the top brands in the utility industry.  

Our rental inventory includes stringing blocks, ground and jumper sets, battery powered cutting and crimping tools, fiberglass hot arms, hoists, dynamometers, rubber goods, and more.  

The Tallman Assembly Department custom-builds ground and jumper sets as well as performing dielectric testing and repair on used grounds and jumpers.  

Our rope department specializes in transformer sling assemblies as well as rope splicing and custom rope solutions.  

Our repair department services all tools commonly used in the utility industry including hydraulic, pneumatic, gas, and battery-powered equipment, stringing blocks, dynamometers, and mechanical hoists. 

Tallman offers complete repair and reconditioning of fiberglass tools, including hot sticks, conductor and support gins, ladders, extension arms, shotgun sticks, and more.  

The Tallman Rubber Lab cleans and performs dielectric testing on rubber gloves, blankets, sleeves, and other rubber goods and cover-up. All testing is done in accordance to ASTM standards.  

At Tallman Equipment, our vision is to deliver quality, convenience, and reliability to our customers by adapting to their needs and always striving to do the right thing.

Did you know 1 out of every 200 transformers experiences failure each year? The safety and cost risks of an unexpected failure can be catastrophic. Dynamic Ratings products and services provide real-time data to help you make smart asset management decisions. Online monitors give you the confidence to extend the life of existing assets using real-time data. Monitors evaluate the equipment in your substation (transformers, circuit breakers, switchgear, and more) and measure their performance to make sure everything is working properly. If something looks out of place, an alarm will notify you of the problem. This information allows utilities to optimize maintenance plans and the performance of their assets to changing system requirements. Learn how we can help at www.dynamicratings.com.

MDF Cable Bus Systems 4465 Limaburg Rd. (Zip 41048) Manufacturer of Cable Bus Systems for High current, electrical busway applications (1000 to 6000 Amps). AC & DC Systems are available from 600 Volt to 35KV. Complete Engineered systems are supplied for Industrial, Utility and Commercial applications including service entrances, primary and secondary feeders, plant distribution, large motor and equipment feeders. Corrosion resistant aluminum, bus enclosures are supplied for indoor and outdoor applications. PVC coated systems are available for highly corrosive environments. Supports for busway systems can also be supplied.

Since 1905, G&W Electric has been a leading provider of innovative power grid solutions including the latest in load and fault interrupting switches; reclosers; sensors; system protection equipment; power grid automation; transmission and distribution cable terminations; and joints and other cable accessories. G&W Electric is headquartered in Bolingbrook, Illinois, U.S.A., with manufacturing facilities and sales support in more than 100 countries, including Canada, Italy, China, Mexico, Brazil, India, and Singapore. We help our customers meet their challenges and gain a competitive edge through a suite of advanced products and technical services.

AFL's conductor accessories provide superior performance and reliability for electric power utilities and rail companies. Drawing on the experience gained from over 80 years designing and manufacturing accessory products, AFL's conductor accessories improve the reliability of critical electrical and optical infrastructure used for the transmission and distribution of electricity.

Our products are manufactured in Duncan, SC in a facility that is certified to ISO 4001 and ISO 9001:2008 standards. AFL’s product offering includes the following:

• Substation accessories — Swage bus accessories including couplers, end caps, terminal taps, expansion supports and more; Swage cable accessories including couplers and terminals; both bolted and welded accessories (supports, couplers, connectors, expansions, taps, terminals, reducers, bus vibration dampers, stud connectors, end plugs and hardware) for voltages up to and including 765kV
• Substation — bus conductors (round, integral web, rectangular bar, channel, universal angle bus, and rectangular bar).
• Transmission accessories — Hi-Temp® compression, standard compression, quick compress and IMPACCT® (Implosive Accessory Technology)
• Rail Transit system accessories — high-speed rail systems, light rail systems, trolley and streetcar systems, 3rd rail systems and complete electrified transit overhead
• Fiber optic cable hardware — dead ends, suspensions, tangents, splice enclosures, snow shoes, attachment hardware and come-a-longs
• Motion control — stockbridge-type vibration dampers, spacers, spacer dampers and software for Aeolian vibration protection
• Wire products — Copperweld strand and solid wire
• Network underground accessories — multi-outlet insulated connector bars, mechanical socket and core compression system, transformer stud connectors, over-current protection devices and explosion-proof protective shells
• Tools and compounds — hydraulic presses, pumps, dies and the new ConductaClean®

The conductor accessories facility has also built an impressive record of environmental stewardship with a recycling rate for paper, wood, metal and plastic exceeding 90 percent, an aggressive storm damage expedite program and a carbon footprint effort aimed at reducing total energy each year by three percent.

We are committed to taking a proactive approach to our customers’ needs, acting with integrity and delivering as promised. AFL understands that it is about quality products and building a strong relationship with every customer.

For decades, our team has distributed most of the leading manufactures equipment in the powerline industry. We have also built and designed some of the most durable, reliable, and trusted tools and equipment in the electrical utility industry. We always go the extra mile to provide not only some of the best customer service but to create some of the most well-tested products possible. We have invested heavily in advanced technology to ensure that every product we produce is second to none. We proudly offer repair services for a wide array of electrical utility tools and equipment, including warranty repairs for many of the most common brands in the industry. We also house some of the most expansive technical testing services for our products including an in-house rubber goods testing lab, ground testing, and hot stick testing.