Functions; Pre Alarm - ABB RD3M Manual

Functions

Pre-alarm → by moving the dip-switch to ON the pre-alarm function is
activated: the output contacts marked by terminals 7 8 9 will switch if a
differential fault above 60% I∆ occurs.
BB_76x88mm_Rd3M_rev4.indd 17

Pre Alarm

OFF
7 8 9
OUTPUT Relay
Prealarm / TRIP
17
ON
10 11 12
19/09/11 11:02