Piedmont Bushings & Insulators

What Piedmont Bushings & Insulators does

Piedmont Bushings & Insulators (PBI) is a woman-owned US manufacturer of dielectric products for medium voltage power distribution, headquartered in a single facility in Woodruff, South Carolina. The company designs and produces bushings (entrance, apparatus, and disconnect types in porcelain, silicone, and proprietary Polykeram materials), a full range of porcelain and silicone insulators, toroidal wound current transformers, and line post sensors for voltages up to 500kV. Its technology stack is anchored by Polykeram—an electrical-grade polymer concrete developed through EPRI in the late 1970s with a trade-secret-protected formulation of UV-resistant polyester resin and finely-graded silica—and the Duresca process for refurbishing legacy circuit breaker bushings. PBI also produces custom engineered-to-order and reverse-engineered components for obsolete or discontinued equipment serving nuclear power facilities.

The company's revenue model is a mix of hardware sales (made-to-order bushings, insulators, CTs, and line sensors) and professional services (Duresca refurbishment, reverse engineering, custom engineering). Pricing is project-based and quote-driven; products carry lead times of 2-10 weeks depending on complexity, with porcelain insulators typically in stock. PBI operates a sales-led go-to-market with direct enterprise sales (Request A Quote form, dedicated phone line), a newly launched self-service online CT catalog, and distributor relationships for the aftermarket channel. Its customer base consists of electric utilities, OEM manufacturers (GE, ABB, Siemens, Mitsubishi, Schneider Electric, Alstom, Powell), and government/defense (U.S. Navy), with named accounts concentrated in the North American electrical power transmission and distribution sector and claims of worldwide distribution reach.

The business traces its institutional history to ITE Circuit Breaker operations in the 1960s in Philadelphia, with subsequent ownership transitions through Gould, Brown Boveri, and ABB, before the Woodruff facility was divested to employees in 1987 to form Piedmont Dielectrics Corporation. The current legal entity—Piedmont Bushings & Insulators, LLC—was established in 2002 as a female-owned enterprise and is privately held with no disclosed institutional investors. Headcount is in the 51-100 range. PBI is a member of PEARL and self-attests to ISO compliance, serving as a specialty supplier into a customer base that depends on its refurbishment and reverse-engineering capabilities for legacy equipment that major OEMs no longer support.

Name

Piedmont Bushings & Insulators

Legal name

Piedmont Bushings & Insulators, LLC

Website

https://pb-i.com

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

51–100 employees

Short description

Piedmont Bushings & Insulators is a woman-owned US manufacturer of dielectric products—bushings, insulators, current transformers, and line sensors—for medium voltage power distribution, serving electric utilities, OEM manufacturers, and government/defense customers with proprietary Polykeram material and Duresca refurbishment services.

Ownership category

akta.pro rank

Headquarters

HQ city

Woodruff

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Dielectric Products Sales: Sale of manufactured products including bushings (entrance, apparatus, disconnect), insulators (porcelain, Polykeram, silicone), current transformers, and line sensors. Products are made-to-order with varying lead times. Replacement apparatus bushings also available for discontinued field equipment.
2. Refurbishment Services: Refurbishment and repair services for circuit breaker bushings including GE Magne Blast, Westinghouse, ABB, ITE HK breakers, Federal Pacific, Allis Chalmers, and other legacy brands. Includes reverse engineering services for obsolete CTs and custom engineered-to-order solutions.
3. Custom Engineered Products: Engineered-to-order solutions for obsolete or discontinued equipment, including reverse engineering of legacy components to meet modern specifications. Serves nuclear, utility, and OEM customers requiring custom dielectric components.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Piedmont Bushings & Insulators (PBI) is a woman-owned manufacturer of dielectric products for medium voltage power distribution. The company designs and produces bushings (entrance, apparatus, disconnect), insulators (porcelain, Polykeram, silicone), current transformers, and line post sensors rated up to 500kV. In addition to manufacturing, PBI provides circuit breaker bushing refurbishment services using the proprietary Duresca process and custom engineered-to-order solutions for obsolete equipment.

Product overview

Piedmont Bushings & Insulators (PBI) is a woman-owned manufacturer specializing in high-quality dielectric products for medium voltage power distribution. The product portfolio centers on bushings (entrance, apparatus, and disconnect/wall types in porcelain, silicone, and Polykeram materials), insulators (porcelain and silicone suspension and distribution products), current transformers (toroidal wound designs in standard and custom configurations), and line post sensors. The company also offers complementary refurbishment services for legacy breaker bushings using the Duresca process and custom engineering/reverse engineering capabilities for obsolete equipment. In 2015, PBI acquired Optisense assets to establish Gridview Optical Solutions for optical sensing products.

Differentiator

Problem solved

Functional benefit

Brands

• Polykeram: An electrical-grade polymer concrete material developed in the late 1970s through EPRI, formulated with proprietary UV-resistant polyester resin filled with finely-graded silica. Used in insulators as an alternative to porcelain.

Products and services

• Entrance Bushings

Quantifiable outcome

• Most failed Magne Blast bushings can be refurbished at a fraction of replacement cost
• +3 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• PEARLcoreOthersPBI is a proud member of PEARL, supporting industry-leading standards for safety, quality, reliability, and sustainability in the electrical power industry.

Scale indicators4 records

Recent moves9 records

Expansion highlights6 records

Direct peers

• Pfiffner Group: Swiss manufacturer of instrument transformers, bushings, and high-voltage test equipment. Comparable specialty transformer and bushing product portfolio to PBI's CT and silicone-shed offerings.
• Trench Group: Manufactures instrument transformers (current and voltage), coils, and bushings for power transmission. Direct overlap with PBI's current transformer and bushing product lines.
• Lapp Insulators: Global manufacturer of high-voltage porcelain and composite insulators serving utilities and OEMs. Comparable medium/high-voltage insulator manufacturing to PBI's silicone and Polykeram offerings.
• Hubbell Power Systems: Manufactures electrical insulators, arresters, cutouts, and other transmission/distribution components. Direct overlap with PBI's insulator and bushing portfolio for utility customers.
• MacLean Power Systems: Designs and manufactures transmission and distribution products including polymer insulators, porcelain insulators, and hardware. Highly comparable product portfolio and customer base to PBI.

Broad incumbents

• NGK Insulators: Large Japanese manufacturer of electrical insulators (porcelain and composite) and other ceramic products. Overlaps with PBI in medium/high-voltage insulators but operates at much greater scale and breadth.
• Siemens Energy: Global energy technology OEM with transformer, switchgear, and grid product lines including dielectric components. Comparable customer relationship profile to PBI's OEM business.
• GE Vernova: Global OEM manufacturer of power generation and grid equipment including switchgear, transformers, and bushings. Both a customer of and a competitor to PBI across dielectric components.
• ABB Electrification: Major OEM manufacturer of switchgear, transformers, and substation components including bushings. Serves as both a customer (refurbishment) and competitive supplier of dielectric products to PBI.

Others

• Weidmann Electrical Technology: Supplier of electrical insulation materials, transformer components, and engineered dielectric parts. Adjacent supplier ecosystem to PBI's dielectric manufacturing operations.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/pb-i

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 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 Piedmont Bushings & Insulators