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Opening The Device; Preventive Maintenance; Inspection - Siemens SINAMICS SM120 Operating Instructions Manual

Control module.
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Maintenance

9.4 Preventive maintenance

Note
Number of grounding harnesses
Depending on the configuration of the drive, use a sufficient number of grounding harnasses.
A grounding harness is required for each three-phase system.
9.3

Opening the device

The doors for the Control Module can be opened for monitoring purposes during operation.
High voltages after shutdown
After shutdown, high voltages are present at the converter and its components. Furthermore,
if the connection to the machine or the line supply is not disconnected and grounded, these
voltages can persist. Touching live components can result in death or serious injury.
● Never force the doors open during operation or while the DC link capacitors are being
● The five safety rules must be observed.
9.4
Preventive maintenance
9.4.1

Inspection

The purpose of an inspection is to ascertain and evaluate the current status of the equipment.
An inspection mainly comprises visual checks. Inspections should be carried out based on a
schedule that meets the needs of the special environmental conditions at the location of use.
The following servicing and inspection instructions are used as the basis for regular inspection
of the equipment.
86
WARNING
discharged.
SINAMICS SM120 6SL38715
Operating Instructions 07/2015

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