Motor Protection

SEL understands how critical it is to provide continuous, reliable motor protection. That is why SEL offers industry-leading products with the most extensive warranty. SEL motor protection relays give customers a custom-fit motor protection system with easy installation for both retrofit and new applications.

Advantages of SEL Motor Protection

  • SEL products lead the industry with the highest mean time between failures (MTBF)—over 1,700 years.*
  • Ten-year warranty and best-in-class technical support.
  • Easy application covering most protection functions. Low base prices with optional motor protection application add-in cards.
*This MTBF metric was calculated in June 2023.

SEL Motor Bus Transfer

Preserve Process Reliability With Multifunction Bus Transfer

Industrial facilities with critical processes require a reliable supply of electric power and typically have two incoming sources. To ensure process continuity during a fault to the primary feeder, the SEL-700BT Motor Bus Transfer Relay quickly and safely transfers loads to an auxiliary feeder. This functionality keeps processes running without requiring a cold start, helps avoid costly shutdowns, provides personnel safety, and helps avoid environmental damage. A single SEL-700BT can protect and control a critical main-main load bus by selecting from two sources automatically, and two SEL-700BT relays (one on each side of the intertie) can transfer the load bus between sources in a main-tie-main configuration.

Main-Main Configuration

Main-Tie-Main Configuration


Reduce Arc-Flash Hazards

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