ABB TRB Series Instruction Leaflet page 2

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