Siemens SIRIUS 3RU - Page 114

Connection
8.4 Connection cross-sections
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
114 Manual, 09/2016, A5E03656507420A/RS-AB/003
Table 8- 19 Main conductors of size S6 with M8 screws
Electronic overload relay with busbar connection
Connecting bars (M8 x 25) 2 x 15 x 4
Tightening torque
10.0 ... 14.0 Nm
Finely stranded with cable lug 16 ... 95 mm²
1)
Stranded with cable lug 25 ... 120 mm²
1)
AWG
4 ... 250 kcmil
1)
When connecting cable lugs according to DIN 46235 with conductor cross-sections of 95 mm
2
and more, the 3RT1956-
4EA1 terminal cover must be used to ensure phase clearance.
Table 8- 20 Main conductors of size S10 / S12 with M10 screws
Electronic overload relay with busbar connection
Connecting bars (M10 x 30) 2 x 25 x 6
Tightening torque 14.0 ... 24.0 Nm
Finely stranded with cable lug 50 ... 240 mm²
1)
Stranded with cable lug 70 ... 240 mm²
1)
AWG
2/0 ... 500 kcmil
1)
When connecting cable lugs in accordance with DIN 46234 for conductor cross-sections from 240 mm
2
, as well as
DIN 46235 for cable cross-sections from 185 mm
2
, use the 3RT1966-4EA1 terminal cover to ensure phase spacing.