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Protective Relay Systems

Reliable real-time protection and control for critical power systems. Ensure operational safety, minimize downtime, and maintain system integrity with our advanced protective relay systems.
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Excitation Systems

Precise voltage control for reliable generator performance. Our excitation systems deliver accurate, responsive control of generator field voltage to ensure stability, reliability, and optimal performance across all operating conditions.
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Voltage Regulators

Consistent, stable voltage control for generators and power systems. Our voltage regulators maintain precise voltage output to protect equipment, enhance quality of power, and ensure system stability.
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Genset Controls

Our genset control systems offer complete command over engine and generator functions, delivering reliable automation, protection, and monitoring for your systems.
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Software

Modern digital devices offer a wide range of configurable settings to meet diverse application needs. With so many parameters and functions available, it is essential to have a user-focused interface. Protective relays and digital devices rely on advanced algorithms and filtering techniques to deliver accurate real-time decisions.
Software

Custom Transformers

Engineering-to-order transformers for specialized power applications. Our custom transformers are designed and built to meet your exact electrical, mechanical, and environmental requirements.
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Accessories

Essential accessories for enhancing and completing your power system. Maximize the performance, reliability, and flexibility of your power equipment with our full range of accessories.
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Products

Manuals

Find Instruction Manuals, Protocol Manuals, Quick Start Guides, Firmware/Software Revision History, and more.
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Certifications

View all Agency Certifications.
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Software

View our BEST software suite, Configuration Files, Modbus TCP Discovery, and more.
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Templates

View Application Templates and Application Components, HMI Files and Templates, Logic Schemes, and more.
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Applications

Get Application Guides, Application Notes, and Product Notes.
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Drawings

Drawings include Product Drawings, Mounting Accessory Drawings, and more.
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Brochures

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Case Studies

Check out our Case Studies.
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View Manuals, Software, Certificates, and more.
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Basler University

At Basler University, you will find a range of training resources, from in-person customer training, virtual learning, instructor-led courses, and on-demand videos.
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In-Person Training

Our expert instructors offer live training on our products and services.
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eLearning

Our online webinar options allow you to attend live courses led by a Basler instructor from your home or office.
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On-Demand Videos

Our library of on-demand videos allows you to learn at your own pace. Find your subject of your choice, and learn as you go.
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Custom Training

We offer customizable training programs tailored to meet your unique needs. Whether you're looking to deepen the understanding of specific systems, enhance troubleshooting skills, or train new employees on best practices, we will work with you to develop a program that fits your goals. Training can be delivered at your site or ours.
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24/7 Technical Support

Technical phone support is available any time of the day or night, every day of the year.
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Basler Services

Basler Services, LLC, formerly E² Power Systems, was acquired in 2017 by Basler Electric to better meet customers' needs by offering seamless solutions for both product and engineering services.
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Electrical System Design

Basler Services delivers cutting-edge Electrical System Design, crafting solutions that optimize performance, safety, and efficiency tailored to your unique requirements. Their expert engineers guide you through every phase—from conceptual layouts and relay coordination to full documentation and commissioning support—ensuring a dependable, compliant electrical infrastructure.
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Basler Services

Turnkey Engineering

With extensive experience delivering turnkey projects, Basler Services combines resources to offer tailored installation solutions. Clients can engage as much—or as little—as they wish, selecting only the specific installation support services that fit their needs.
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Basler Services

Contact Basler Services

Basler Services offers comprehensive servics designed to keep your power generation systems running reliably and in compliance. From emergency troubleshooting and scheduled system maintenance to NERC compliance testing and tailored technical training, their on-the-ground engineers ensure your operations are efficient and your team is empowered.
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Basler Services

Consulting

Basler Services offers expert consulting to optimize electrical power systems for safety, reliability, and performance. Our team works closely with clients to assess challenges and deliver tailored, cost-effective solutions.
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About Us

Our core purpose is to enhance people’s lives by developing highly reliable solutions that add quality to their lives.
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Locations

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Quality Programs and Certifications

Basler Electric’s Quality Policy applies to all of its manufacturing facilities and utilizes the same system designed to comply with the requirement necessary to obtain ISO certification.
Our Commitment to Quality

Our History

From the 1940s to today, Basler is Always Innovating, Always Evolving.
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Careers

Joining the Basler Team means becoming a member of a global energy technology leader who is advancing the energy transition across 145 countries. It means partnering with customers to help solve some of the most complex, mission-critical energy challenges. And, it means working for a company who values their employees and families.
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Events

See our calendar of events, tradeshows, and conferences.
View our Schedule of Events

ES-81O, Overfrequency Relay

ES frequency relays provide frequency monitoring and protection for use in single-phase or three-phase applications. Three models are available: the ES-81O provides overfrequency protection, the ES-81U provides underfrequency protection, and the ES-81O/U provides overfrequency and underfrequency protection. Microprocessor-based circuitry enhances functionality and improves performance. Internal diagnostics annunciate when relay function or accuracy is compromised.

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ES Series Protection Relays

Get in Touch 24/7/365

Technical Support is available any time of day or night, every day of the year. We look forward to hearing from you. Services include:

  • Excitation Systems Troubleshooting
  • Generator Startup Support
  • Replacement Product Review
  • Custom Settings Evaluation

Get in Touch

We want to hear from you. Send us a note with your feedback or questions.

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Technical Support

Basler Electric Company Global Headquarters 618.654.2341 USATechSupport@basler.com