Protection Hardware-in-the-Loop (HIL) Testing

Closed-Loop Testing of Electric Power Protection Systems Since 2002

Improve power system performance in critical applications, validate protective relay performance, and optimize relay settings at our model power system testing laboratory. SEL will create a Real Time Digital Simulator (RTDS) model of your power system, distributed energy resources (DERs), and loads. Protective relays are then physically wired to the RTDS to simulate realistic conditions. This system allows us to test over 1,000 fault cases in less than 24 hours. This level of testing provides the equivalent of many years of operating history.

Key Testing and Validation Offerings 

  • Series compensation
  • Single-pole trip (SPT)
  • Communications-assisted schemes
  • Transformer inrush studies
  • Machine parameter estimation
  • Model power system validation
  • Transient response analysis
  • Phase-shifting transformer (PST) controller testing
“Thank you, SEL team, for the successful RTDS testing. It turned out better than expected, identifying and fixing several relay setting problems on four 500 kV lines faster than we anticipated.”
Jeff SamsArizona Public Service Company

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