KAESER CSD 75 - Direction of Rotation Check; Motor Overload Relay Adjustment

Initial Start
7 --- 25
7.4 Direction of Rotation Check
The compressor is wired for connection to a clockwise phase se-
quence power supply.
A check of the direction of rotation can be made by testing the phase sequence.
Arrows showing the direction of rotation are located on the motor and on the airend hous-
ing.
 On your initial start, ”bump” the unit and verify the direction of rotation.
If the direction of rotation is incorrect, change over the supply conductors L1 and L2.
If the airend rotates in the wrong direction, the compressor is auto-
matically shut down by the safety air pressure switch (4.2, see
chapter 5.4).
7.5 Motor Overload Relay Adjustment
Lock the main disconnect in the ”off” position in accordance with ap-
plicable lock out/tag out procedures (example: OSHA CFR 29
§ 1910.147) to ensure the compressor does not restart. See
chapter 2.3 for the main disconnect switch.
The relay is set to the standard adjustment at the factory.
Compressor motor: Wye--delta start
In the Wye---delta configuration the phase current is fed through the motor overload relay.
This phase current is 0.58 times the nominal motor current.
For the nominal motor current see motor nameplate.
Adjustment:
To prevent the overload relay from tripping (because of voltage fluctuations, temperature
influences or component tolerances), the value can be set up to 15% higher than the
calculated phase current.
2
1
1 Motor overload adjustment
2 Reset button
Attention!
Attention!