Siemens SIMOTICS HV M, Operating Instructions Manual

Page: 62 / 136

● The maximum permissible clamping thickness of 10 mm for the cable lug or strap is not
exceeded
● The minimum required screw-in depth and the tightening torque for the clamping bolt are
listed in the table below. The screw-in depth and tightening torque differ depending on
whether cable lugs or ground terminals are used:
Screw Screw-in depth Tightening torque
M12 x 25 > 16 mm 38 Nm
M16 x 35 > 20 mm 92 Nm
Tightening torque of bolts with cable lugs
Screw Screw-in depth Tightening torque
M6 > 9 mm 8 Nm
M8 > 12 mm 20 Nm
M10 > 15 mm 40 Nm
Tightening torque of bolts with ground terminals
6.1.6 Radio-frequency grounding for converter operation
In converter operation, the converter emits RF alternating currents. To establish and RF-
specific optimal connection between motor terminal box and motor enclosure, you can use
flexible braided copper flat cables with low impedance and a broad frequency range.
Establish the radio-frequency ground connection with flat cables. Alternatively you can
establish the radio-frequency ground connection with cable lugs.
①
Hexagon bolt
⑤
Hexagon nut
②
Spring washer
⑥
Radio-frequency grounding cable
③
Terminal Board
⑦
Cable lug
④
Grounding conductor
Figure 6-2 High-frequency grounding
You find further information in the "Operation with converter (Page 35)" section.
Electrical connection
6.1 Preparation
SIMOTICS HV M 1RN76308PR900CG0-Z
62
Operating Instructions 07/2018