User Manual

System overview
3.3 Connection methods
3UG4 / 3RR2 monitoring relays
Manual, 02/2013, NEB927043002000/RS-AA/002
19
3.3 Connection methods
3.3.1 Screw-type connection
Screw-type connection
Use the following tool to establish the connection: All SIRIUS monitoring relays feature
size PZ 2 screws for Pozidriv screwdrivers.
The devices have screw terminals with captive screws and washers. The screw terminals
also allow for the connection of 2 conductors with different cross-sections.
Connection cross-sections of the removable terminal blocks with screw-type connections
Table 3- 1 Removable terminal block with screw-type connections - monitoring relays
Removable terminal
Tool Pozidriv size PZ 2, Ø 5 to 6 mm
Tightening torque 0.8 to 1.2 Nm
1 x (0.5 to 4) mm² Solid and stranded

2 x (0.5 to 2.5) mm²
Finely stranded
without end sleeve

---
1 x (0.5 to 2.5) mm² Finely stranded with
end sleeve

2 x (0.5 to 1.5) mm²
AWG 2 x (20 to 14)