NWL

What NWL does

NWL (formerly Nothelfer Winding Laboratories) is a vertically integrated manufacturer and designer of high-voltage power conversion equipment — transformers, inductors, and power supplies — serving industrial, oil & gas, and military end-markets. Founded in the 1930s by John Nothelfer as a transformer repair shop, the company now operates as a wholly owned subsidiary of American Superconductor Corporation (AMSC) and runs three production facilities in Bordentown, New Jersey (headquarters), Gyeonggi-do, Korea (NWL Pacific), and Bielsko-Biała, Poland (NWL Europe, acquired December 2021 from Belos PLP-SA). NWL is AS9100:2016 and ISO 9001:2015 registered and serves customers across power generation, oil & gas, military/defense, industrial manufacturing, and medical/research.

The product portfolio is built around three platforms: (1) electrostatic precipitator (ESP) equipment, headlined by the proprietary PowerPlus™ high-frequency switch-mode power supply line featuring 50 kHz resonant switching, the ML™ mid-frequency series, linear 50/60 Hz transformer/rectifier sets (50–4,000 kW), the PowerCube™ SCR replacement, and the PCAMS, GRC, and GVC control systems; (2) customized transformers and inductors for military and industrial motor-drive applications, with the largest single unit produced to date rated at 36 MVA / 56,000 lb; and (3) electrostatic coalescer power supplies for oil & gas dehydrators and desalters, a 50-plus-year in-house specialty. Products integrate with industrial protocols including Profibus, DeviceNet, CANopen, Profinet, EtherNet/IP, EtherCAT, and Modbus, and carry UL, CSA, ATEX, and CE certifications as required by application. Customization is structural: every unit is engineered to customer power, voltage, fluid, and certification specifications.

NWL operates a B2B, direct enterprise field-sales motion with regional account managers across North America, Europe, Asia, and Brazil, supplemented by value-added resellers (Ceeco Equipment in Ohio/Kentucky, Tai & Chyun in Taiwan/China, Luft Brasil in São Paulo, Autodata in India). Pricing is fully quote-based across all product lines. Disclosed 2023 revenue was over $71M (30% growth, a record year), driven by ESP demand, transformer business, and military sales; the largest single contract in the company's history — Qatar Petroleum motor-drive transformers for the North Field East LNG expansion — ran Q3 2021 to Q2 2023. The 2020 sale of the Capacitor Division to CD Snow Hill (a Cornell Dubilier subsidiary) and a concurrent Bordentown transformer facility expansion (5,080 sq. ft. plus a 45-ton crane) reframed the portfolio around higher-value power-conversion segments, while NWL Europe turned profitable in 2023 after the 2021 acquisition.

Name

NWL

Legal name

NWL, Inc.

Website

https://nwl.com

Company type

Private

Founded year

1930

Operating status

Operating

Headcount range

251–500 employees

Short description

NWL is a US-headquartered manufacturer of high-voltage power supplies, transformers, and inductors for electrostatic precipitators, oil & gas, and military applications, operating three production facilities globally as a subsidiary of American Superconductor Corporation.

Ownership category

akta.pro rank

Product category

Industrial Power Conversion Equipment

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311), Switchgear and Switchboard Apparatus Manufacturing (335313)

SIC

Power, Distribution & Specialty Transformers (3612), Switchgear & Switchboard Apparatus (3613)

akta.pro primary industry

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

akta.pro secondary industries

High-Voltage & High-Power Conversion (HVDC supplies, traction/rail converters, large rectifiers) (IMAGADAH), High-Voltage Electrical Systems (Switchgear, Transformers, Protection & Control) (EUAEAFAA)

Keywords

• Electrostatic precipitator power supplies
• Industrial transformers inductors
• Switch mode power supplies
• Transformer rectifier sets
• Power conversion equipment

Headquarters

HQ city

Bordentown

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Power Supply Sales: NWL manufactures and sells high-voltage power supplies including switch mode power supplies (PowerPlus series), linear power supplies, and mid-frequency supplies for electrostatic precipitators, industrial dehydrators/desalters, and general industrial applications.
2. Transformer & Inductor Sales: Design and manufacture of transformers, inductors, and reactors for military, industrial motor drives, power generation, and oil & gas applications. This includes the large contract for Qatar Gas expansion project with motor drive transformers.
3. ESP Controls & Components: Sales of ESP control systems including Graphic Rapper Controllers, Graphic Voltage Controllers, PCAMS, switch arrangements, current limiting reactors, and associated components and replacement parts.
4. Service & Support: Field service, troubleshooting, repair, and support for installed ESP power supplies, transformers, and inductors. Includes Reliability Assessment Program (RAP) for evaluating existing equipment condition.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels6 records

Core offering

NWL designs and manufactures high-voltage power conversion equipment — including transformers, inductors, and power supplies — for electrostatic precipitators, industrial motor drives, oil & gas dehydrators/desalters, and military applications. The product portfolio spans the proprietary PowerPlus™ high-frequency switch mode power supply platform, ML™ mid-frequency SMPS, linear 50/60 Hz supplies, transformer/rectifier sets, current limiting reactors, and ESP control systems (GRC, GVC, PCAMS). Solutions are custom-engineered, vertically produced in-house, and supported by global field service.

Product overview

NWL (Nothelfer Winding Laboratories) is a vertically integrated manufacturer and designer of power conversion solutions for industrial and military applications, founded in the 1930s. The company operates three global manufacturing facilities (New Jersey, Korea, Poland) and offers three interrelated product families: (1) ESP (Electrostatic Precipitator) products — including PowerPlus™ Series high-frequency switch mode power supplies, mid-frequency ML™ Series supplies, linear 50/60 Hz supplies, transformer/rectifier sets, current limiting reactors, PowerCube™ SCR replacements, Graphic Rapper Controllers (GRC), Graphic Voltage Controllers (GVC), PCAMS control systems, and associated communications/software; (2) Transformers and Inductors for military and industrial use, including motor drive transformers, input inductors, and output reactors; and (3) Power supplies for specialized applications such as oil/gas dehydrators and desalters. The portfolio is complemented by NWL Europe (acquired December 2021 from Belos), which manufactures transformer rectifiers and provides European field service. NWL historically manufactured capacitors but divested that division to CD Snow Hill/ Cornell Dubilier in 2020 to focus on core power conversion segments.

Differentiator

Problem solved

Functional benefit

Brands

• PowerPlus™: High frequency switch mode power supplies for electrostatic precipitators and industrial applications
• PowerCube™
• ML™ Series

Products and services

• PowerPlus™ Series High Frequency Switch Mode Power Supplies High-frequency switch mode power supplies for electrostatic precipitators and industrial applications. Available in multiple series (6, 6.1, 7, 7.5) with output voltages 70–120 kVDC and power levels from 4.2 kW to 200 kW, supporting Profibus DPV1, DeviceNet, CANopen, Profinet IO, EtherNet/IP, EtherCAT, CC-Link, Modbus RTU/TCP, ControlNet, and Sercos III protocols.
• ML™ Series Mid Frequency Switch Mode Power Supplies Mid-frequency switch mode power supplies for electrostatic precipitator applications, complementing the PowerPlus high-frequency family with alternative operating characteristics for different ESP requirements.
• Linear 50/60 Hz Power Supplies Linear power supplies rated 50 to 4000 kW with input voltages 600V to 15 kV class and output voltages AC or DC (oil filled 30–150 kV, dry type up to 30 kV). Available as regulated SCR power supplies or unregulated transformer/rectifier sets.
• Power Supplies for Dehydrators/Desalters Specialized power supplies for industrial dehydrators and desalters used to remove water and salt from crude oil. Standard units range 12–25 kV output and 25–250 kVA with UL, CSA and ATEX certifications; custom double half-wave DC units available for low-conductivity refined oils.
• Transformer/Rectifier (T/R) Sets Transformer-rectifier sets for electrostatic precipitator applications, available in single-phase and three-phase configurations with oil-filled and dry-type designs and various output voltage and current ratings.
• Current Limiting Reactors Current limiting reactors for ESP power supply circuits, available with various impedance ratings and tap configurations.
• PowerCube™ SCR Replacement Assemblies Compact replacement for standard puck-style SCR assemblies, providing a more serviceable power conversion solution for ESP upgrade applications.
• Graphic Rapper Controller (GRC) Control system for ESP rapper mechanisms, supporting multiple configurations including DC impact, vibrators, DC multi-impact, motor starter/solenoid, and POR outputs, with NEMA 4 and NEMA 4X enclosure options.
• Graphic Voltage Controller (GVC) Control system for ESP voltage regulation and T/R controls, available with various enclosure ratings (NEMA 4, 12, 4X) and options including CE certification, hammer boards, kVDC/mADC transducers, and shunt trip breaker.
• Precipitator Control and Management System (PCAMS) Comprehensive control and management system for electrostatic precipitators that integrates power supply and rapper controls into a single operator platform.
• Military Transformers & Inductors Specialized transformers and inductors designed for military applications such as naval systems, meeting stringent AS9100:2016 quality and reliability standards. Capabilities include vacuum and pressure impregnation, epoxy dielectrics, and oil-filled units.
• Industrial Transformers & Inductors Specialty transformers, reactors, and chokes for industrial applications including motor drives, oil & gas, and power conversion. Supports both high- and low-volume production with vacuum/pressure impregnation, epoxy dielectrics, and oil-filled units.
• Motor Drive Transformers Large custom transformers for industrial motor drive applications, with capacities up to 36 MVA and weights exceeding 56,000 pounds. Includes motor drive transformers, input inductors and output reactors for LNG, oil & gas and other heavy industrial facilities.

Quantifiable outcome

• 2023 was a record revenue year with 30% growth to over $71 million
• +5 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature10 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Belos PLP-SAcoreStrategic or Co-development Partner · 1 December 2021Acquired Belos Unit Electrical Devices (BUED) from Belos PLP-SA in Bielsko-Biała, Poland in December 2021. Company now operates as NWL Europe. Acquisition enables expansion of manufacturing and service footprint into European precipitator market. Belos started business in 1954 and began manufacturing precipitator transformer rectifiers in 1956.
• Tai & ChyunminorChannel Partner/ Reseller/ DistributorTaiwan-based value-added reseller that has installed PowerPlus switch mode power supplies on electrostatic precipitators at customer facilities in China. Successfully documented results published in their newsletter showing ESP performance improvements on coal-fired boiler at paper mill.
• Ceeco Equipment Inc.minorChannel Partner/ Reseller/ DistributorOhio-based value-added reseller covering Northern Ohio (Tim Beringer Jr.) and Southern Ohio/Kentucky (Arnie Beringer) regions for NWL ESP products including precipitator power supplies and controls.
• Luft BrasilminorChannel Partner/ Reseller/ DistributorBrazilian distributor (Marcelo William Ferreira) covering Sao Paulo region for NWL products including ESP power supplies and related equipment.
• AutodataminorChannel Partner/ Reseller/ DistributorJoint venture partner referenced in Powergen India event announcement. Partnership for serving the Indian market with NWL and Autodata jointly presenting at trade show.

Scale indicators7 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Hammond Power Solutions: Hammond Power Solutions designs and manufactures dry-type and cast-resin transformers, reactors, and related magnetics for industrial, power, and renewable energy applications. Directly comparable to NWL's transformer and inductor business across overlapping customer segments (industrial motor drives, power conversion, OEM) and similar custom-build, lower-volume, higher-mix model.
• AEG Power Solutions: AEG Power Solutions manufactures industrial AC/DC power supplies, UPS systems, and high-power converters for process industries, power generation, and rail. Closely comparable to NWL's PowerPlus and T/R set product lines, with overlapping industrial and power generation customers and similar high-voltage power conversion technology.
• Jefferson Electric: Jefferson Electric manufactures dry-type and cast-resin transformers for industrial, commercial, and OEM applications. Directly comparable to NWL's industrial transformer business in custom/specialty magnetics for motor drives, O&G, and general industrial power conversion.

Broad incumbents

• ABB: ABB is a global electrification and automation leader offering transformers, switchgear, power conversion, and grid solutions across industrial, utility, and transportation markets. While much broader in scope, ABB directly competes with NWL in industrial transformers, power supplies, and high-voltage conversion equipment serving similar end-customers.
• Siemens Energy: Siemens Energy supplies power generation, transmission, and industrial power conversion equipment globally, including transformers, drives, and switchgear. Overlaps with NWL in transformers for power generation (coal, gas, LNG) and ESP-related industrial power supplies, though at much greater scale and portfolio breadth.
• Eaton: Eaton is a diversified power management company with significant exposure to industrial transformers, power supplies, and switchgear. Competes with NWL in industrial power conversion and motor drive magnetics, though Eaton's portfolio is much broader and more standardized.
• Schneider Electric: Schneider Electric offers industrial power supplies, transformers, and energy management solutions for process industries and infrastructure. Overlaps with NWL in industrial power conversion and ESP-related applications, but at a much larger scale with a focus on digitally enabled, standardized platforms.
• Hubbell: Hubbell manufactures electrical products including transformers and switchgear for utility and industrial applications. Competes with NWL in custom and specialty transformers, though Hubbell's offering is broader and oriented toward utility-grade distribution rather than ESP-specific power conversion.

Emerging players

• KCC (KC Cottrell): KC Cottrell is a Korean electrostatic precipitator and air pollution control systems provider, directly comparable to NWL's ESP business in both technology (T/R sets, controls) and customer base (coal-fired power, cement, steel). As a regional Asian player, it is a strong overlap in NWL Pacific's home market.

Regional players

• Belos PLP-SA: Belos PLP-SA is a Polish manufacturer of transformer-rectifiers and power supplies for electrostatic precipitators and industrial applications, the parent of the entity NWL acquired (Belos BUED, now NWL Europe) in 2021. Remains a closely related European ESP power supply competitor operating in adjacent product lines and geographies.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/nwl

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Subsidiaries2 records

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 NWL