I.L. 41-842D
2
Figure 1. Optional Schematic
Figure 2. Internal Schematic of Type TRB-2
Zener Tripping Unit
Figure 4. Internal Schematic of Type TRB-4
Zener Tripping Unit
Figure 3. Internal Schematic of Type TRB-3
Zener Tripping Unit
187A713
187A696
187A697
187A698
Sub 1
Sub 1
Sub 1
Sub 1
dc Trip Bus
Pos.
Neg.
Relay #1
Relay #2
52d1
52d2
#1
#2
PR
52
TC
52
TC
TRB-2
D2
D1
1
4
8
5
8
5
1
4
3
8
5
1
4
3
7
