Siemens 3UG4 - Page 22

System overview
3.3 Connection methods
3UG4 / 3RR2 monitoring relays
22 Manual, 05/2016, NEB927043002000/RS-AC/004
Connection cross-sections of the permanently connected terminal blocks with screw-type connections
The following table lists the permissible conductor cross-sections for the main conductor
connections of 3RR2 current monitoring relays with analog and digital setting (size S00, S0
and S2) with screw-type connections.
Table 3- 2 Permanently connected terminal block with screw-type connection - Main conductor terminals of the 3RR2
current monitoring relays
Permanently connected terminal
Size S00
Size S0
Size S2
Tool Pozidriv size PZ 2,
Ø 5 to 6 mm
Pozidriv size PZ 2,
Ø 5 to 6 mm
Pozidriv size PZ 2
Ø 5 to 6 mm
Tightening torque
0.8 to 1.2 Nm
2 - 2.5 Nm
3 to 4.5 Nm (27 to 40 lb.in)
Solid and stranded
2 x (0.5 to 1.5) mm²
2 x (1 to 2.5) mm²
2 x (1.0 to 35 mm²)
2 x (0.75 to 2.5) mm²
2 x (2.5 to 10) mm² 1 x (1.0 to 50 mm²)
max. 2 x (1 ... 4) mm²
Finely stranded
without end sleeve
--- --- ---
Finely stranded
with end sleeve
2 x (0.5 to 1.5) mm²
2 x (1 to 2.5) mm²
2 x (1.0 to 25 mm²)
2 x (0.75 to 2.5) mm²
2 x (2.5 to 6) mm²
1 x (1.0 to 35 mm²)
max. 1 x 10 mm²
AWG
2 x (20 to 14)
2 x (16 to 12)
2 x (18 to 2)
1 x 12 2 x (14 to 8) 1 x (18 to 1)