ABB TRB Series Instruction Leaflet page 3

TERMINAL SCREWS .190-32
BINDING HEAD
FIG DESCRIPTION
TRB STATIC TRIPPING UNIT
1
TRB-1 BLOCKING VALVE
2 TRB-1 TEST UNIT
3 TRB ZENER TRIPPING UNITS
4 SAR AUX RELAY
5 SRX RELAY
Figure 5. Outline and Drilling Plan for Types TRB, TRB-1, TRB-2, TRB-3 and TRB-4 Zener Tripping Units
AVAILABLE
OPENING
CLEARANCE FOR .190-32
FIL.HD.MTG. SCREW
DIM. A
4-27 / 32
2-1 / 32
4-27 / 32
4-27 / 32
5.781
I.L. 41-842D
Sub 6
184A117
3