Connection Methods; Screw-Type Connection - Siemens SIRIUS 3UG4 Equipment 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 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
Tool
Tightening torque
Solid and stranded
Finely stranded with‐
out end sleeve
Finely stranded with
end sleeve
AWG
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
Tool
Tightening torque
Solid and stranded
AWG
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005
Removable terminal
Pozidriv size PZ 2, Ø 5 to 6 mm
0.8 to 1.2 Nm
1 x (0.5 to 4) mm²
2 x (0.5 to 2.5) mm²
---
1 x (0.5 to 2.5) mm²
2 x (0.5 to 1.5) mm²
2 x (20 to 14)
Removable terminal
Pozidriv size PZ 1, diam. 4.5 mm
0.6 to 0.8 Nm
1 x (0.5 to 4.0) mm²
2 x (0.5 to 2.5) mm²
1 x (20 to 12)
2 x (20 to 14)
System overview
3.3 Connection methods
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