Bay Control and Substation Integration

Bay Control and Substation Protection Products

SEL bay control and protection solutions monitor and control your substation’s mission-critical equipment and functions—including double breakers, reclosing, breaker failure, and auxiliaries such as air break switches, grounding switches, and more.

SEL-2240 Axion

With an integrated 7-inch color touchscreen, the SEL-2240 Axion is ideal for application as a bay control unit. The Axion Bay Controller’s modular configuration allows you to expand the device to control and monitor over one hundred switching devices across multiple substation bays.

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SEL-451 Protection, Automation, and Bay Control System

Complete substation bay control with high-speed breaker protection and simplified settings in one economical system. Flexible bus configurations provide easy status and control of up to 20 disconnect switches and two breakers.

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Digital Secondary System (Digital Substation) Solutions

When your substation’s secondary system—the low-voltage equipment that controls and protects the substation’s high-voltage primary equipment—uses digital technology instead of analog circuits to transmit data between the instrument transformers and protective relays, it’s easier to install and your substation becomes safer.

To help you achieve these benefits, SEL offers two digital secondary system approaches: our innovative Time-Domain Link (TiDL) technology and an IEC 61850-9-2 Sampled Values (SV) solution.

An SEL digital secondary system solution offers many advantages. You can:

  • Increase safety by moving high-energy copper cables out of the control house and away from where people work.
  • Reduce costs by decreasing the materials and labor required for wiring installation, commissioning, and documentation.
  • Minimize misoperations due to wiring errors by reducing the number of physical routing paths and connections.

Build an SEL TiDL Solution

SEL TiDL technology uses a point-to-point architecture to deliver a simple, secure solution. It is protection-centric, with no network engineering, no switched network, no external time source for protection, and minimum training requirements. TiDL is easy to implement and offers strong cybersecurity.

Build an IEC 61850-9-2 SV Solution

The SEL SV solution is a communications-centric, interoperable IEC 61850-9-2 option for modernizing your substation’s secondary systems that includes merging units with built-in protection.

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.

Questions? Contact Us!

If you have any questions about SEL products, services, solutions, or support, please contact us. Our service and support professionals are ready to provide the answers you need.

Unbeatable Support

SEL support teams are stationed in regional offices around the world and staffed with application engineers who are experts in our products and in power system applications.

Technical support for SEL-manufactured devices is always free. No matter how often you need to call or how long your SEL products have been in service, you’ll reach an SEL expert who can provide the service and support you need.

Our cybersecurity team is always ready with the information and resources needed to keep your OT networks and critical systems secure and working effectively. Cyber services support contracts can include incident response, audits, system hardening, and more, depending on your anticipated needs.

More about SEL warranty and support