What GEC Durham Industries does

GEC Durham Industries is a privately held manufacturer of instrument transformers used in revenue metering applications, operating as a subsidiary of The Durham Company since 1993. The company's core product is the GEC/Astra line of high-accuracy current transformers (CTs) and voltage transformers (VTs), covering miniature window/bar CTs (100–800 Amp), large window/bar CTs (up to 4000 Amp), pad-mount bushing-style CTs, voltage transformers (300/500/750 VA series), and the Eliminator Series extended-range CTs. Supporting accessories include aluminum mounting brackets in Top Hat, Channel, and Angle configurations. All products are engineered to comply with IEEE C57.13.6, ANSI, NEMA, and EEI standards, with accuracy ratings of 0.15% and 0.3% and Ratio Correction Factor (RCF) technology for billing-grade measurement at operating temperatures up to 85°C.

The company sells directly to electric utilities and electrical contractors in the United States through phone and website contact channels, with quote-based pricing under multi-year contracts and no public price list. Its marketing is content-led — product catalogs (including the 2025 GEC Catalog), cross-reference guides, and educational resources on CT burden/load and open-circuit safety — aimed at utility procurement and engineering audiences. Administrative offices are headquartered at 722 Durham Rd., Lebanon, Missouri, and a new manufacturing facility is being developed in Buffalo, Missouri, supported by partnerships with the City of Buffalo, Dallas County R-I School District, Dallas County, and the Missouri Department of Economic Development.

GEC Durham operates as a niche, vertically focused manufacturer with no disclosed revenue, no public filings, no disclosed headcount, and no international footprint beyond the domestic US market. Its competitive position rests on regulatory compliance (IEEE/ANSI/NEMA/EEI), proprietary product families (GEC/Astra, Eliminator), 30+ years of category presence, and durable procurement relationships with North American utilities.

Name

GEC Durham Industries

Legal name

GEC Durham Industries

Website

https://gecdurham.com

Company type

Private

Founded year

1993

Operating status

Operating

Headcount range

11–50 employees

Short description

GEC Durham Industries, a subsidiary of The Durham Company since 1993, manufactures high-accuracy instrument transformers (CTs and voltage transformers) for revenue metering, serving electric utilities and electrical contractors across the United States under the GEC/Astra brand.

Ownership category

akta.pro rank

Product category

Instrument Transformers

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311)

SIC

Power, Distribution & Specialty Transformers (3612)

akta.pro primary industry

Instrument Transformers (CTs/VTs) & Sensors (Conventional/Optical) (EUADACAG)

akta.pro secondary industry

Transformers (Power, Distribution, Instrument, Specialty) (IMAGAAAA)

Keywords

• Instrument transformers
• Current transformers
• Voltage transformers
• Revenue metering
• Electrical measurement

Headquarters

HQ city

Lebanon

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Instrument Transformer Sales: GEC Durham generates revenue through the sale of instrument transformers including Current Transformers (CTs), Voltage Transformers, and related mounting hardware. Products are sold under the GEC/Astra brand.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

GEC Durham Industries manufactures and sells GEC/Astra brand instrument transformers for revenue metering and electrical measurement applications. The portfolio includes current transformers (CTs) rated from 100 to 4,000 amps, voltage transformers (300/500/750 VA), pad mount bushing-style CTs, and the Eliminator Series extended range transformers, complemented by aluminum transformer brackets. All products are designed to meet IEEE C57.13.6, ANSI, NEMA, and EEI standards for high-accuracy revenue metering.

Product overview

GEC Durham Industries, a subsidiary of The Durham Company since 1993, manufactures the GEC/Astra line of instrument transformers for revenue metering and electrical measurement applications. The product portfolio centers on the GEC/Astra Instrument Transformers line, which includes miniature, intermediate, and large window/bar type current transformers (CTs) rated for 300V to 600V classes, pad mount bushing-style CTs, and voltage transformers (300/500/750 Volt Amp series). The Eliminator series offers extended range transformers with dual ratio configurations for flexible applications. Supporting accessories include transformer mounting brackets in Top Hat, Channel, and Angle configurations. All products meet IEEE C57.13.6, ANSI, NEMA, and EEI standards.

Differentiator

Problem solved

Functional benefit

Brands

• Astra: Astra Instrument Rated Transformers - product line of high-accuracy current transformers and voltage transformers for revenue metering applications
• Eliminator Series

Products and services

• GEC/Astra Instrument Transformers A comprehensive line of instrument transformers for revenue metering and electrical measurement applications, including current transformers (CTs) and voltage transformers rated for 300V, 500V, 600V, and 750V classes, sold to utility companies and electrical contractors.
• Miniature Window & Bar CTs Compact current transformers in window and bar configurations (TCW and TCB series) for 100-300 amp primary applications, with stud and pressure type secondary terminals, for utility metering.
• Intermediate Window & Bar CTs Medium-sized current transformers (AB series) for 100-800 amp primary applications with dual ratio options and various mounting configurations, for revenue metering.
• Large Window & Bar CTs High-capacity current transformers (AD, ACL, ALC series) for 800-4,000 amp primary applications, designed for revenue metering with accuracy ratings up to 0.15%.
• Padmount CTs Bushing-style pad mount current transformers (AP series) with grabber stabilization for bus bar mounting, maintaining accuracy through rating factor to 85°C.
• Voltage Transformers Instrument voltage transformers including DB (500 Volt Amps), DF (300 Volt Amps), and DA (750 Volt Amps) series for voltage measurement and metering applications.
• The Eliminator Series Extended Range CTs Extended range current transformers (AD and ACL type) designed for wider operational ranges with improved accuracy, featuring dual ratio configurations for flexible installation.
• Transformer Brackets Aluminum mounting hardware for instrument transformers, including Top Hat (ALD series), Channel (ALC series), and Angle (ALT series) brackets in 1-5 position configurations.

Quantifiable outcome

• RCF accuracy measurement enables precise billing calculations with values typically between 0.9980-1.0000

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Instrument Transformers Inc. Specialty manufacturer of current and voltage instrument transformers for revenue metering and relaying; closest niche competitor to GEC Durham in North America.
• Ritz Instrument Transformers: Specialty manufacturer of instrument transformers (CTs/VTs) for metering and protection applications serving utilities and industry — a direct niche competitor to GEC/Astra.
• Kuhlman Electric (ERMCO): Manufacturer of distribution and instrument transformers for utility metering and power applications, comparable in product scope and customer base to GEC Durham.

Broad incumbents

• GE Grid Solutions: Incumbent supplier of instrument transformers and metering products to U.S. and global utilities, with comparable CT/VT accuracy grades and revenue-metering applications.
• Siemens Energy: Global electrical equipment manufacturer with a broad instrument transformer product line serving transmission, distribution, and revenue metering customers comparable to GEC Durham's utility focus.
• Schweitzer Engineering Laboratories (SEL): Supplies metering and protection-grade instrument transformers alongside its relay portfolio to utilities, overlapping with GEC Durham's revenue-metering CT/VT use cases.
• ABB (Hitachi Energy): Major manufacturer of instrument transformers (CTs/VTs) for utility revenue metering and protection, offering a global portfolio that competes directly with GEC/Astra CTs in utility tenders.
• Eaton: Diversified electrical equipment manufacturer with revenue-metering instrument transformer offerings serving utilities and industrial customers in overlapping applications.

Emerging players

• Sifam Tesar: Specialty manufacturer of current transformers and measurement transformers used in metering and energy monitoring — a comparable niche player with a regional focus.
• Phoenix Contact: Supplies current transformers, voltage taps, and metering accessories for energy monitoring applications — partially overlapping with GEC Durham's revenue-metering CT portfolio.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/gec-durham-industries

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about GEC Durham Industries