Siemens 3UG4 - 3.3 Connection methods

System overview
3.3 Connection methods
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
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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
Solid and stranded
1 x (0.5 to 4) mm²
2 x (0.5 to 2.5) mm²
Finely stranded without end sleeve
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Finely stranded with end sleeve
1 x (0.5 to 2.5) mm²
2 x (0.5 to 1.5) mm²
AWG
2 x (20 to 14)