7.4 Setting the overload protection cut-out
Electrical diagram 13.4 gives the location of the overload protection cut-out.
Direct online starting (SX3 only)
In the direct-starting configuration, the phase current is fed to the drive motor via the overload pro‐
tection cut-out.
To prevent the overload protection cut-out from being triggered by voltage fluctuations, temperature
influences or component tolerances, the setting can be higher than the rated motor current.
➤ Check the overload protection cut-out setting.
The overload protection cut-out shuts the machine down despite being correctly set?
➤ Contact the KAESER Service.
Star-delta starting
With star-delta starting, the phase current is fed via the overload protection cut-out. This phase current
is 0.58-times the rated motor current.
To prevent the overload protection cut-out from being triggered by voltage fluctuations, temperature
influences or component tolerances, the setting can be higher than the arithmetical phase current.
➤ Check the overload protection cut-out setting.
The overload protection cut-out shuts the machine down despite being correctly set?
➤ Contact the KAESER Service.
7.5 Filling cooling oil into the airend
Before starting the compressor for the very first time and before re-starting after a shutdown period
of more than 3 months it is necessary to manually add a quantity of cooling oil into the airend. In order
to avoid that the cooling oil exceeds the permissible level, drain the required quantity from the de-
pressurised oil separator tank.
Chapter 10.14 provides detailed information on how to drain cooling oil from the oil separator tank.
Material 0.25 lCooling oil
Precondition The supply disconnecting device is switched off,
the device is locked off,
the absence of voltage has been verified.
7
Initial Start-up
7.4
Setting the overload protection cut-out
38
Service Manual Screw Compressor
SX SIGMA CONTROL BASIC
9_6919 04 E
Option C17
Summary of Contents for SX
Page 2: ...Original instructions KKW SSX 1 04 en SBA SCHRAUBEN SCB...
Page 6: ...Contents iv Service Manual Screw Compressor SX SIGMA CONTROL BASIC 9_6919 04 E...
Page 8: ...List of Illustrations vi Service Manual Screw Compressor SX SIGMA CONTROL BASIC 9_6919 04 E...
Page 10: ...List of Tables viii Service Manual Screw Compressor SX SIGMA CONTROL BASIC 9_6919 04 E...
