2/12/2013 11:24 AM | |
Posts: 2 Rating: (0) |
Problem :ACB 3WL tripping on Earth Fault after30 secas soon as we close it.(Used as coupler in PCC panel. ACB details & Other details of ACB are as follows Make- Siemens Rating/I max - 4000 Amp.,Ui - 1000 V Order Detail- 3WL 1240-2DG-47-4GP2,C20 F40 K07 T40 S05 Identi no. 6641290306005 Q-Test 1 Passed Details Handling No.- 0010089665 Order.Position - 000090 AKZ - R007 MLFB - 3WL 1232-3AS42-1AA2Z Identi No. - 491290109106 Folllowing things observed during the operation of ACB (This ACB is used as bus coupler ) 1. As the ACB switched on it trips within a few second on Ground Fault - (setting of G - C,tg- 0.3) 2.This ACB trips only whenload increases (aproxmetely - 800 amp.) 3. Checkedcoil resistance it is found as follows - R -red-red wire - 5.3 Ohm,blue - black wire - 226.5 Ohm Y-red-red wire - 5.3 Ohm,blue - black wire - 226.3 Ohm B -red-red wire - 5.3 Ohm,blue - black wire - 0 Ohm Attachment:Photo0119.jpg |
2/13/2013 9:17 AM | |
Joined: 4/24/2009 Last visit: 8/20/2024 Posts: 2682 Rating: (135) |
Thread closed, because question is already published in the following thread ACB 3WL tripping on Earth Fault after30 sec as soon as we close it Best regards O_Moderator |
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