By means of a pressure transducer, the pressure in the compressed air network can be measured
at any selected location and this signal used to regulate the compressor.
This ensures optimum compressor regulation with regard to the network pressure at the selected
location.
Safety monitoring of the machine's internal pressure is unaffected.
An authorized KAESER service representative will be glad to provide support on planning
and executing an individual solution.
1. Install the pressure transducer at the selected location in the compressed air network.
2. Using a suitable cable, connect the pressure transducer to a spare analog input.
➤ Connect as large an area of the shielding as possible to the mounting plate in the control
cabinet or use an EMC fitting to make contact.
3. When commissioning the machine with a SIGMA CONTROL 2 , select the
< Network actual
pressure > setting in the < AII > menu.
4. Select and activate the used analog input ( AII ).
Further information The electrical diagram in chapter 13.4 contains further details of the pressure transducer connec‐
tion.
6.5 Making the Power Supply Connection
The machine is not wired ready for operation!
This is a Tri-Voltage machine.
The machine can be set up to one of the following supply voltages:
■ 208V
■ 230V
■ 460V
Precondition The power supply disconnecting device is switched off.
The disconnecting device is locked in the off position.
A check has been made to ensure no voltage is present.
1. Have the electrical connections carried out by authorized personnel only.
2. Carry out protection measures as stipulated in relevant regulations (IEC 364 for example) and
in national accident prevention regulations. In addition, the regulations of the local electricity
supplier must be observed.
3. Test the overcurrent protection cut-out to ensure that the time it takes to disconnect in re‐
sponse to a fault is within the permitted limit.
4. Use supply conductors and fuses in accordance with local regulations.
5. The user must provide the machine with a lockable supply disconnecting device.
This could be, for example, a switch-disconnector with fuses. If a circuit breaker is used it must
be suitable for the motor starting characteristics.
6. Check that the correct taps on the control voltage transformer are connected according to the
supply voltage.
If this is not correct, change the connection to suit the power supply voltage.
6
Installation
6.5
Making the Power Supply Connection
9_5875 33 USE
Operator Manual Screw Compressor
SM Tri-Voltage, SIGMA CONTROL 2
37
