T&D Buyer's Guide

High Voltage, Inc. designs and manufactures industry-leading high voltage test equipment for proof testing, diagnostic testing,  high voltage breakdown testing, and preventative maintenance testing. Trusted for the most technically-advanced, portable, and user-friendly high voltage equipment on the market. HVI test sets are used worldwide by utilities, testing service companies, electrical contractors, large industrial factories, and electrical apparatus OEMs.

HVI has been an essential supplier of electrical testers and test kits for over 20 years. Our familiarity with the regulations and procedures inherent to this industry make us more than a supplier or manufacturer, but a partner. Customers turn to HVI for its high-quality testing equipment, unparalleled customer support, and its commitment to sharing deep industry knowledge in an approachable, helpful way.

By working closely with technicians and professionals like you, we have been able to consistently innovate new technologies and solve real world problems with custom solutions. For the industry standard in high voltage testing equipment, you can rely on HVI.

Critter Guard designs and manufactures animal prevention products to protect substations and transformers from critter-related power outages. Many utilities have standardized using Critter Guard products for its effectiveness and proven reliability in all weather conditions.

Critter Guard BLOCKS points of entry via utility poles and power lines. With Critter Guard, critical components aren't simply covered up like the competition.

Common features of Critter Guard products include:

• No need to de-power the line for installation or substation maintenance.

• Nothing to replace or lose during service.

• Easy Installation

Critter Guard’s product line consists of: Line Guard, Pole Guard, and BirdBloc. All of these systems are defined by one characteristic — No Access.

Now in 110 countries, Doble Engineering Company has been helping clients in the electric power industry improve operations and optimize system performance for nearly a century.

Doble Engineering Company offers diagnostic instruments, services, and the world’s premier library of statistically significant apparatus test results for the benefit of energy generation and delivery companies and industrial power users worldwide.

Sediver is the pioneer and industry leader in high voltage toughened glass insulation technology for more than 75 years. Our outstanding track record confirms the quality of our products, with 650  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

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.

Safety focused manufacturer of heavy duty switch-rated plugs and receptacles and other connectors ranging from 15- 600 amps. Meltric products eliminate safety concerns associated with traditional pin & sleeve and twist type devices. The Decontactor™ Series plugs and receptacles feature dead front construction, silver-nickel butt style pressure contacts and ingress protection up to NEMA 4X and IP 66/67. Products are UL and CSA approved to make and break under load and have a 10kAIC short circuit rating. Products can be pre-wired, assembled as cord-sets, mounted on panel boxes or in custom fabrications.

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.