ACS 300 User’s Manual 21
Chapter 3 - Power Connections
Insulation Checks
Warning! Insulation checks are to be done before connecting the
ACS 300 to the mains. Before proceeding with the insulation
resistance measurements, make sure that the ACS 300 is
disconnected from the mains. Failure to disconnect the mains
could result in death or serious injury.
Terminal Connections
To connect the mains, motor and control cables, remove the front
cover of the unit by loosening the two screws at the bottom.
The TEMP LIM parameter provides motor thermal protection. If
this feature is not used, the motor connected to the ACS 300
requires overload protection in accordance with the National
Electric Code (U.S.A).
Connect the mains and motor cables according to the layout in
figure 3-1, page 16.
In case the shield is used also as a protective conductor, you
must connect it both to the clamp and to the PE terminal.
Clamping alone is insufficient.
Note! In addition to clamping the motor cable screen to the
clamping plate at the ACS 300, connect the screen to motor
earth at the motor.
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