Schweitzer Engineering Laboratories

What Schweitzer Engineering Laboratories does

Schweitzer Engineering Laboratories (SEL) is a 100% employee-owned US corporation headquartered in Pullman, Washington that designs, manufactures, and services digital products and systems for electric power system protection, automation, and control. Founded in 1982 by Dr. Edmund O. Schweitzer, III, who invented the first commercially available microprocessor-based digital protective relay (SEL-21), the company operates five US manufacturing facilities in Washington, Idaho, Illinois, and Indiana, plus regional panel assembly factories in Mexico, Colombia, and Brazil, and serves customers in 170+ countries through a network of more than 100 offices.

SEL's product portfolio centers on digital protective relays incorporating proprietary time-domain technology and traveling-wave fault locating, the SEL Real-Time Automation Controller (RTAC) platform, the SEL powerMAX microgrid management and control system, OT Software-Defined Networking switches and security gateways, wide-area multiplexers, and the LINAM sub-brand of fault indicators and sensors. Supporting software includes the ACSELERATOR suite for configuration, automation, visualization, and grid analysis. The company sells hardware, turnkey engineering services for substation automation and microgrid control, and training through SEL University, with a 10-year worldwide warranty and free lifetime technical support backing every product.

The company employs more than 7,400 people globally, has been 100% employee-owned since 2009 via its ESOP established in 1994, and is the 13th largest employee-owned company in the United States. Its GTM motion is direct enterprise field sales with regional technical support, targeting investor-owned utilities, public power utilities, cooperatives, and critical infrastructure operators across generation, transmission, distribution, substation automation, microgrid, and OT cybersecurity use cases. Revenue is not publicly disclosed; the company operates without external funding rounds, parent company, or subsidiaries.

Name

Schweitzer Engineering Laboratories

Legal name

Schweitzer Engineering Laboratories

Website

https://selinc.com

Company type

Private

Founded year

1984

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

Schweitzer Engineering Laboratories (SEL) is a 100% employee-owned US manufacturer of digital protective relays, automation controllers, OT networking, and cybersecurity systems for electric utilities and critical infrastructure operators worldwide, selling hardware, engineering services, and training across 170+ countries.

Ownership category

akta.pro rank

Product category

Power System Protection & Automation Equipment

NAICS

Relay and Industrial Control Manufacturing (335314), Switchgear and Switchboard Apparatus Manufacturing (335313)

SIC

Switchgear & Switchboard Apparatus (3613), Industrial Instruments For Measurement, Display, And Control (3823), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

Protection, Control & Monitoring (Relays, RTUs, Fault Recorders, Condition Monitoring) (IMAGAAAD)

akta.pro secondary industries

Grid Automation & Communications (SCADA Gateways, IEC 61850, Teleprotection, Substation Networking) (IMAGAAAE), Protection, control & substation automation engineering (relay/RTU/IEC 61850) (EUADAKAD), Microgrid & Distributed Grid Equipment (Controllers, Switchgear Packages, DER Interconnection) (IMAGAAAJ), SCADA & Telemetry Software (Control Center) (EUADAEAD)

Keywords

• Power system protection
• Microgrid control systems
• Protective relays
• Substation automation
• Industrial cybersecurity

Headquarters

HQ city

Pullman

HQ country

United States

HQ region

North America

Offices10 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Power System Protection Hardware: Digital protective relays and electronic devices for power system protection. Products include SEL-21 (first microprocessor-based digital protective relay), feeder protection relays, transformer protection relays, motor protection relays, and generator protection relays.
2. Networking and Communications Products: Managed switches, unmanaged switches, security devices, wide-area multiplexers, wireless communications solutions, and configuration software for utility, commercial, and industrial environments.
3. Engineering Services: Turnkey engineering services for substation automation, microgrid control systems, cybersecurity services including NERC CIP compliance, design, implementation, and ongoing support.
4. SEL University Training: Training courses for power system engineers, technicians, and managers covering fundamental principles to hands-on SEL product application and testing. Offers Professional Development Hours (PDHs).

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Schweitzer Engineering Laboratories designs, manufactures, and sells digital protective relays, real-time automation controllers (RTAC), networking and communications equipment, cybersecurity products, and the powerMAX microgrid management platform for electric utilities, power generators, and industrial customers. The company also provides turnkey engineering services for substation automation and microgrid control, plus LINAM fault indicators and sensors, and SEL University training.

Product overview

SEL is a 100% employee-owned company that invents, designs, and builds digital products and systems protecting power grids worldwide. The product portfolio centers on protective relays (including time-domain technology and traveling-wave fault locating), Real-Time Automation Controllers (RTAC) for microgrid control and power management via the powerMAX platform, cybersecurity solutions including OPNsense on rugged SEL hardware, and networking/communications equipment. The ACSELERATOR software suite (RTAC, QuickSet, Bay Screen Builder, Grid Configurator) provides configuration and management capabilities. The LINAM sub-brand offers fault indicators and sensors for distribution systems with a 77-year legacy. Key hardware includes managed/unmanaged Ethernet switches, security gateways, wide-area multiplexers, cellular routers, and precision timing devices. Products are manufactured in the USA with a 10-year worldwide warranty and lifetime technical support.

Differentiator

Problem solved

Functional benefit

Brands

• LINAM: Fault indicators and sensors product line with a 77-year history of innovation in the electric power industry, beginning in 1949 with the Live Line Ammeter introduced by Edmund O. Schweitzer, Jr.

Products and services

• SEL Protective Relays Digital protective relays for electric power systems, including time-domain technology and traveling-wave fault-locating variants (examples: SEL-411L, SEL-451, SEL-651R, SEL-751, SEL-787, SEL-700 series). Sold to electric utilities and industrial customers for fault protection of feeders, transformers, motors, generators, and transmission lines.
• SEL-3555 Real-Time Automation Controller (RTAC) Rugged automation controller that serves as the brain of microgrid control and power management systems, providing logic processing to coordinate protective relays, controllers, software, and cybersecurity at subcycle speeds.
• SEL-3355 Automation Controller Rugged automation controller designed for OT environments with no moving parts, tested to protective-relay standards, and rated for vibration, electrical surges, fast transients, and extreme temperatures (-40 to +75C).
• SEL Managed Ethernet Switches (SEL-2731, SEL-2741, SEL-2742, SEL-2743, SEL-2744) OT Software-Defined Networking (OT SDN) and RSTP managed switches providing performance, reliability, and cybersecurity for utility, commercial, and industrial communications networks.
• SEL Security Devices (SEL-3610, SEL-3620, SEL-3622) Port servers and Ethernet security gateways that protect network perimeters and secure communications within local-area networks for OT environments.
• SEL powerMAX Power Management and Control System Microgrid management platform composed of protective relays, controllers, software, cybersecurity, and logic processing that coordinates microgrid, battery, and photovoltaic systems with the main grid. Used by utilities, universities, and community microgrid projects.
• ACSELERATOR Software Suite Software suite including acSELerator RTAC (SEL-5033), acSELerator QuickSet (SEL-5030), acSELerator Bay Screen Builder (SEL-5036), and SEL Grid Configurator (SEL-5037) for configuration, automation, visualization, and analysis of SEL devices.
• SEL Wide-Area Multiplexers (ICON) Integrated Communications Optical Network systems providing high-performance communications between control centers and substations, supporting teleprotection applications with precise time distribution.
• SEL-3061 Cellular Router and SEL-3031 Serial Radio Transceiver Wireless communications solutions providing flexible and secure connectivity for remote sites where wired infrastructure is unavailable or cost-prohibitive.
• SEL-651R Advanced Recloser Control Recloser control device that communicates with reclosers and microgrid control systems to island from and resynchronize with the grid during fault conditions.
• SEL-2488 Satellite-Synchronized Network Clock Precision timing device for synchronizing IEDs and microgrid systems using satellite timing signals.
• OPNsense on SEL Hardware Stateful firewall solution running OPNsense software on rugged SEL automation controllers. Provides deep-packet inspection, adaptive routing, and hardware failover, supporting OSPF, BGP, and RIP across a -40 to +75C temperature range.
• SEL-5056 Network Management System (NMS) Configuration and visualization software for managing local-area and wide-area communications networks, including a Microsoft Visio add-in for network design.
• LINAM Fault Indicators and Sensors Fault indicators and sensors for overhead, underground, and hybrid distribution systems that help utilities locate and repair faults quickly. Features include advanced adjacent-phase immunity, wireless communications, and battery-free designs. The LINAM brand legacy spans 77 years and includes more than 100 patents, beginning with the 1949 Live Line Ammeter.
• Transformer Controller with LTC (Load Tap Changer) Control Transformer controller with Load Tap Changer control functionality, part of SEL's protection and control solutions for power systems.
• Turnkey Engineering Services Professional engineering services for substation automation, microgrid control systems, and cybersecurity implementations, including NERC CIP compliance, design, implementation, and ongoing support for utility and industrial customers.
• SEL University Training Training courses for power-system engineers, technicians, and managers covering fundamental principles through hands-on SEL product application and testing, delivered via in-person, virtual, and eLearning formats with Professional Development Hours (PDHs).

Quantifiable outcome

• Mean time between repairs exceeds 250 years for SEL products
• +2 more outcomes

Named customers11 records

Segments5 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered core.

• Department of Energy (DOE) CyTRICS ProgramcoreStrategic or Co-development Partner · 9 March 2021SEL joined the DOE Cyber Testing for Resilient Industrial Control Systems (CyTRICS) program, which focuses on identifying vulnerabilities in the technology supply chain. The program tests and analyzes equipment at National Laboratories to confirm security of software and firmware components.
• Puget Sound Energy (PSE)coreStrategic or Co-development PartnerCollaborated on Samish Island community microgrid project providing backup power for fire station. SEL Engineering Services designed and implemented microgrid controller using SEL powerMAX system built around SEL-3555 RTAC.

Scale indicators11 records

Recent moves10 records

Expansion highlights5 records

Broad incumbents

• Siemens Smart Infrastructure: Siemens offers SIPROTEC protective relays, SICAM substation automation, and grid software that compete head-on with SEL's relays, RTAC, and powerMAX platforms across generation, transmission, distribution, and microgrid use cases globally.
• Schneider Electric: Schneider Electric offers Sepam, Vamp, and Easergy protective relays plus EcoStruxure grid and microgrid solutions, competing with SEL in protection, substation automation, and increasingly in microgrid control for utilities and C&I customers.
• Eaton: Eaton competes with SEL in protective relays, feeder automation, and grid-tied power equipment through its Electrical Americas and eMobility divisions, with particular strength in North American utility distribution and switchgear.
• GE Vernova (Grid Solutions): GE Vernova provides UR-series protective relays, hardfiber process bus, and substation automation that overlap directly with SEL's relay and substation automation portfolio while offering additional HVDC, transformers, and grid software.
• Hitachi Energy (formerly ABB Grid Integration): Hitachi Energy is the dominant global incumbent in power T&D equipment, offering protective relays, substation automation, grid communication, and microgrid solutions that directly overlap with SEL's portfolio but as part of a much broader portfolio serving utilities worldwide.
• Hubbell (Beckwith/Hubbell Power Systems): Hubbell Power Systems competes with SEL across distribution automation, protective relaying, and grid communication, including through its Beckwith Electric subsidiary, offering broader portfolio breadth than SEL in utility-grade hardware.
• ABB (Electrification / Installation Products): ABB's Electrification business offers Relion protective relays and substation automation that overlap with SEL's protection and control portfolio, leveraging ABB's broader switchgear, electrification, and industrial customer base.

Direct peers

• Beckwith Electric: Beckwith Electric specializes in transformer and feeder protection relays, LTC controls, and paralleling / synchronizing equipment that closely mirror SEL's protective relay portfolio, particularly for U.S. utility and distributed generation applications.
• S&C Electric Company: S&C Electric is a closely comparable direct competitor in microgrid controls, self-healing distribution automation, and switchgear-based protection, often bidding against SEL on U.S. utility distribution and microgrid projects.

Emerging players

• Schweitzer Engineering Laboratories competitor: SEL itself is the standard; for emerging microgrid/OT-cyber peers consider EnerSys, Vertiv, or similar: Vertiv Holdings, via its Liebert and critical power infrastructure portfolio, increasingly competes in OT-grade networking, microgrid-adjacent power management, and ruggedized controllers for utility and data center customers, partially overlapping SEL's automation controller and rugged networking lines.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/SEL_news
• Facebookfacebook.com/SchweitzerEngineering%2F
• LinkedInlinkedin.com/company/sel/?trk=biz-companies-cyms

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Funding overview

Funding rounds

Investors

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

M&A

Investments4 records

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

Frequently asked questions about Schweitzer Engineering Laboratories