Siemens SIMOTICS FD 1LL1, Инструкция по эксплуатации и установке

Страница: 90 / 188

There is a hexagon bolt with a flat washer and a spring washer on the stator frame at the
designated connecting point for the grounding conductor. The grounding conductor can be
connected as follows:
● With stranded cables with cable lugs
● With flat cables with cable end designed accordingly
As an alternative, you can connect the grounding conductor without cable lugs using a terminal
plate at the marked connection point.
Connecting the grounding conductor
● Ensure that the connecting surface is bare and is protected against corrosion using a
suitable substance, e.g. acid-free vaseline.
● Arrange the flat washer and spring washer under the bolt head.
● Check that the maximum permissible clamping thickness of 10 mm for the cable lug or strap
is not exceeded.
● Fasten the clamping screw according to the following table. Screw-in depth and tightening
torque are different depending on whether cable lugs or ground terminals are used.
Screw Screw-in depth Tightening torque
When using cable lugs M6 > 6 mm 8 Nm
M8 > 8 mm 20 Nm
M12 x 25 > 16 mm 38 Nm
M16 x 35 > 20 mm 92 Nm
When using grounding
terminals
M6 > 9 mm 8 Nm
M8 > 12 mm 20 Nm
M10 > 15 mm 40 Nm
M12 > 18 mm 70 Nm
M16 > 20 mm 170 Nm
● Use the connecting terminals designated for the grounding conductor in the terminal box.
See also
Converter operation (Page 106)
6.4.4 Connect metal shield in the terminal box
If you are using metal-armored cables that are inserted into the terminal or auxiliary terminal
boxes with non-intrinsically safe circuits, then ground the metal shield in the terminal box.
Additional grounding points are permissible.
● In terminal boxes with internal grounding part, connect the metal shield to the internal
grounding point.
● In terminal boxes without internal grounding part, connect the metal shield to one of the
green-yellow grounding terminals.
Electrical connection
6.4 Preparation
SIMOTICS FD 1MH1
90
Operating Instructions 08/2017