Electrical Connection - Siemens 1LG0 Installation And Maintenance Manual

3.4 Electrical connection

There are six power terminals and one earthing terminal located in the terminal box for
FS80 to FS355. For FS315 and FS355, there is an additional earthing point located on the
base of the frame. All motors are suitable for bi - directional rotation (CW or CCW). Phase
change can be achieved by interchanging any two phases.
Mains Power Connection
Windings of standard three-phase single speed motors can be connected either in
star or delta or star-delta connection. Voltage and frequency deviations of ±5% Vac
and ±2% Hz respectively of the rated voltage and frequency values are acceptable for
proper operation.
Cable Connection Examples
Please refer to Table 1 for tightening torque and direction for electrical terminal lugs.
Table 1
Torque (Nm)
Note:
All work must be carried out by skilled worker.
Before starting any work, be sure to isolate the machine
from the main and auxiliary power supply as applicable.
Mains must be secured against accidental switch on.
Size M4
1.2
Tightening Torque (Nm, Tolerance: ±10%)
FS315 & FS355 External Earthing
M5 M6 M8
2.5 4.0 8.0
M10 M12 M16
13 20 40
7