Siemens SIRIUS 3UG4 User Manual

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 di󹪜erent 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 with‐
out end sleeve

---
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)
Connection cross-sections of the removable terminal blocks with screw-type connections
Table 3-2 Removable terminal block with screw-type connection technology- insulation monitoring relay 3UG458.-1AW31 /
3UG4583-1CW31 / voltage reducer module 3UG4983-1AA01
Removable terminal
Tool Pozidriv size PZ 1, diam. 4.5 mm
Tightening torque 0.6 to 0.8 Nm
Solid and stranded

1 x (0.5 to 4.0) mm²
2 x (0.5 to 2.5) mm²
AWG 1 x (20 to 12)
2 x (20 to 14)
System overview
3.3 Connection methods
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005 23

Siemens SIRIUS 3UG4 Specifications

General

Brand	Siemens
Model	SIRIUS 3UG4
Category	Relays
Language	English