Transmission
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.
Learn moreSEL-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.
Learn moreDigital 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.