Directional protection of 2 transformers in parallel: suggested alternative settings to avoid incorrect operation (i.e. spurious tripping) of Sepam units
Goals and Symptoms
Standard setting of angle for directional 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.
AEDL3
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Last Revised: 13 June 2008 by DRMApplies To: Operation of Sepam Protection Relays
Original Author: DM
Public
All content © 1992-2008 Schneider Electric
Legacy KB System (APS) Data: RESL191288 V2.0, Originally authored by KBAdPM on 02/27/2008, Last Edited by DaMi on 06/14/2008
Related ranges: Sepam series 80, Sepam series 40, Protection plan