Date Code 20000421 Appendix B B-1
SEL-251, -2, -3 Instruction Manual
APPENDIX B - MAIN BOARD TROUBLESHOOTING TEST
POINTS AND JUMPER LOCATIONS
Figure B.1: SEL-251 Conventional Terminal Block Model Main Board Troubleshooting
Test Points and Jumper Locations
5-amp nominal current input main board shown (SLP chassis). The 1-amp main board (LP
chassis) has a similar layout, but the test point positions and order are different. Follow the
labels on the board.
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