In today’s environment of looming economic challenges, increasingly complex regulations, and reduced engineering staff, you can rely on SEL to provide solutions that help you operate more safely and efficiently than ever before. SEL solutions and devices are interoperable and are designed to be implemented in modular stages and integrated with other systems.
Implement a plant-wide system or start with a single relay and scale up to a complete, integrated power management system over time. An SEL solution is always able to flex and grow with your business needs.
And no matter what approach you choose, you’ll have unlimited access to technical support as long as you have SEL products in service.
Use SEL solutions to:
- Protect and control electrical feeders and the connection to the utility grid. SEL solutions improve plant uptime by detecting electrical system faults and anomalies before damage occurs.
- Increase worker safety and protect valuable equipment with coordinated arc-flash mitigation.
- Extend the life of electric motors and pumps. SEL solutions employ advanced motor control technologies, including electrical, thermal, and vibration monitoring, to reduce equipment stress.
- Support future expansion. SEL devices let you modify, customize, and scale solutions to fit your needs.
- Build resiliency and cybersecurity into your electric power systems.
- Integrate power system and plant control for higher efficiency and better decision-making. SEL products are interoperable with other devices and support IEC 61850 standards.
Rugged and Reliable—Guaranteed
SEL products are designed and manufactured for the world’s most challenging environments, exceeding all industry standards for temperature, shock, and electric stress. An optional conformal coating for circuit boards adds an extra level of protection against contaminants in extreme environments.
Every SEL product comes with a ten-year warranty—the best in the electric power industry. If any product fails under warranty, we’ll repair or replace it for free.
Prefabricated retrofit bezels, easy mounting adapters, flexible I/O options, and fast settings make it easy to upgrade your protection systems. Programmable buttons, and user-configurable faceplate labels make SEL relays easy to use.
Power System and Electrical Equipment Protection
Use SEL products to protect essential electrical infrastructure, maximize uptime, keep workers safe, drive process improvement, and reduce energy costs and consumption.
SEL provides reliable, proven, and comprehensive solutions for:
- Motor protection—including electrical, thermal, and vibration monitoring and protection.
- Protection and management of electrical feeders and utility grid connections.
- Power quality and metering.
- Resilient power management and uninterrupted power delivery.
- IEC 61850 integration.
SEL-751 Feeder Protection Relay
Electrical feeder protection, automation, and control capabilities, all in one package.
- Arc-flash detection and mitigation with dual detection methods for speed and security.
- Fault location and event analysis.
- Situational awareness and asset monitoring.
- Integration with control centers via SCADA protocols.
- Rated for hazardous and potentially explosive environments.
SEL-851 Feeder Protection Relay
Electrical feeder protection, monitoring, and control in a compact package.
- Comprehensive current, voltage, and frequency elements to protect low- and medium-voltage feeders.
- Arc-flash detection for secure, reliable, and fast-acting protection.
- Universal hardware to help reduce maintenance expenses.
- Advanced communications for system integration.
- Reduced commissioning time with SEL Grid Configurator.
SEL-849 Motor Management Relay
Comprehensive motor protection plus arc-flash detection and power metering. Install the SEL-849 inside a motor control center (MCC), and connect it to an external HMI if desired.
- Motor protection features, including short-circuit, load loss, load jam, frequent starting, imbalanced current, and phase reversal protection as well as an advanced thermal model.
- Built-in arc-flash detection for secure, reliable, and fast-acting protection.
- Can be configured to protect feeder circuits.
- Metering and monitoring functions for system awareness and rapid diagnostics.
- Integration into supervisory or coordinated protection and control systems.
Safety Solutions
Arc-flash mitigation and high- and low-impedance fault detection are built into our protective relays, making it easier to implement robust, coordinated electric safety solutions.
Arc-Flash Mitigation
SEL provides an integrated, scalable arc-flash mitigation solution in low- and medium-voltage switchgear.
- Dual detection method combines fast overcurrent and fiber-optic light sensing to provide ultra-fast reaction time and avoid false activations.
- The integrated and coordinated SEL solution is easier than competing systems to install and maintain—and is more reliable.
These SEL products are available with integrated arc-flash mitigation features:
Bus Differential Protection
Industrial facilities seeking to implement arc-flash mitigation with electrical bus protection schemes can use SEL bus differential relays to accelerate fault detection and reduce fault duration in switchgear and buses. High- and low-impedance bus differential schemes provide fast detection (less than 1.5 cycles) and secure fault clearing—reducing incident energy without impacting upstream or downstream devices and with no manual intervention.
Use these SEL products in your bus differential protection scheme:
Process Improvement and Efficiency
SEL power control and automation solutions securely integrate the electric power system’s status and data into plant control systems for increased efficiency and better decision-making.
Implement SEL solutions to:
- Improve power system status visibility with SCADA integration.
- Simplify power system monitoring for better and faster decision-making.
- Integrate power system protection and plant control with IEC 61850 standards.
- Manage and reduce energy cost and consumption.
- Strengthen your cyber defenses with secure, reliable communications.
Secure Network Communications
Use SEL devices to create a local area network and allow data exchange between relays and automation controllers in your power system.
Resilient Power Systems
SEL power system protection and control solutions prevent process interruption, maintain uptime, and protect your operational technology networks against cyber attacks. Our products and solutions are designed with simplicity and resilience in mind.
With SEL solutions, you can:
- Integrate in-plant and distributed generation sources.
- Shed load intelligently to keep critical processes running.
- Operate as an islanded microgrid.
- Implement cybersecure protection and control systems.
Power Management
Ensure power system resiliency in the event of electrical service interruptions or utility grid failures. SEL powerMAX Power Management and Control Systems feature:
- High-speed protection capabilities to safeguard your plant’s electric infrastructure.
- Automatic source transfer to keep critical processes running.
- The ability to seamlessly island and reconnect to the utility grid as conditions demand.
- Integration of distributed energy resources and renewables.
- Complete power management capabilities.
powerMAX Power Management Solutions
Our expert engineers can design and commission a fully integrated, turnkey power management solution that ensures maximum control and reliability.
Cybersecurity Services
SEL Engineering Services can partner with you to create secure, layered defenses for your operational technology (OT) systems and make sure they stay secure with streamlined full lifecycle support.
Engineering Services
Let us partner with you to create an SEL solution for your system. From engineering studies and system design through commissioning and training, SEL engineers bring inventiveness and a deep understanding of the fundamental principles of electric power systems to every project. No matter how complex or sophisticated the system, we can help you protect, simplify, and control it.
Products and Service You Can Rely On
SEL products are designed and manufactured for the world’s most challenging environments, exceeding all industry standards for temperature, shock, and electric stress. An optional conformal coating for circuit boards adds an extra level of protection against contaminants in extreme environments.
Every SEL product comes with a ten-year warranty—the best in the industry. If any product fails under warranty, we’ll repair or replace it for free.