Here’s what more than 2,500 business decision-makers around the world say.Download the report
...with the Facility Hero app in hand! Discover how you can optimize your maintenance efforts today.Learn more
Access tailored services, 24/7 self-service and expert help. Anywhere, anytime, any project.Discover now
Everything you need to know about our IoT technology backbone.Learn more
Explore our global offerings or select your country from one of our five regions.Global
Découvrez nos offres globales ou sélectionnez votre pays dans l’une de nos cinq régions.
Goals and Symptoms
Standard setting of angle for directionnal protection is in this case is 45° but incorrect operation ( (i.e. spurious tripping) can occur with this setting.
Facts and Changes
Key Words and Phrases:
unexpected trips, directional detection, undetected events, non-detection, unwarranted tripping
Causes and Fixes
Attached document explains which alternative settings can be used to avoid spurious tripping.
Last Revised: 13 June 2008 by DRM
Applies To: Operation of Sepam Protection Relays
Original Author: DM
All content © 1992-2008 Schneider Electric