User Manual

System overview
3.3 Connection methods
3UG4 / 3RR2 monitoring relays
24 Manual, 02/2013, NEB927043002000/RS-AA/002
Connection cross-sections of the removable terminal blocks with spring-loaded connections
Table 3- 5 Removable terminal block with spring-loaded connections - monitoring relays
Removable terminal
Tool Ø3.0 x 0.5 (3RA2908-1A)
Solid and stranded

2 x (0.25 to 1.5) mm²
Finely stranded without end
sleeve

2 x (0.25 to 1.5) mm²
Finely stranded with end
sleeve

2 x (0.25 to 1.5) mm²
AWG 2 x (24 to 16)
Connection cross-sections of the permanently connected terminal blocks with a spring-loaded
connection
The following table lists the permissible conductor cross-sections for the main conductor
terminals of the 3RR2 current monitoring relays for analog and digital setting (size S00 and
S0) with a spring-loaded connection.
Table 3- 6 Permanently connected terminal block with spring-loaded connection - Main conductor terminals of the 3RR2
current monitoring relays
Permanently connected terminal
Size S00 Size S0
Tool Ø3.0 x 0.5 (3RA2908-1A) Ø3.0 x 0.5 (3RA2908-1A)
Solid

1 x (0.5 to 4) mm² 1 x (1 to 10) mm²
Finely stranded
without end sleeve

1 x (0.5 to 2.5) mm² 1 x (1 to 6) mm²
Finely stranded with
end sleeve

1 x (0.5 to 2.5) mm² 1 x (1 to 6) mm²
AWG 1 x (20 to 12) 1 x (18 to 8)