Radio-Frequency Grounding For Converter Operation - Siemens 1LA8 Operating Instructions Manual

6.3.5

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
②
③
④
You find further information in the "Operation with converter (Page 79)" section.
6.3.6 Connection without terminal box
If the machine was ordered with brought-out cables, i.e. without terminal box, then the proper
connection must be made in an external terminal box.
Ensure that the external terminal box is dimensioned according to the data on the rating plate
and is suitable for the respective use.
Faults as a result of incorrect technical design
Faults can occur if the appropriate technical data is not complied with when connecting up.
For instance, degree of protection, minimum air and creepage distances. These faults can
result in eventual or immediate death, serious injury or material damage.
Observe the data on the rating plate.
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 05/2014
Hexagon bolt
Spring washer
Terminal Board
Grounding conductor
WARNING
⑤
Hexagon nut
⑥
Radio-frequency grounding cable
⑦
Cable lug
Electrical connection
6.3 Preparation
67