A Call to Action: Say YES to Restricted Earth Fault Protection

Are you using restricted earth fault (REF) elements to protect your transformers? If not, you could increase the dependability, sensitivity, and speed of ground fault protection in your transformer relays by using REF.

Watch this technical presentation where SEL presenters Swagata Das and Ariana Hargrave will explain:

• Why 87R alone is not enough to protect a transformer.
• How the REF element complements the 87R element to increase winding coverage.
• How the REF element in SEL relays works and how to set it.
• How a new tool troubleshoots REF installations and analyzes operations using SEL-5601-2 synchroWAVe Event Software.

Resources

Reference Files