Atlas Copco Stationary Air Compressors User Manual

Instruction book 

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24 

 
General 
 
The electrical installation must correspond to the local codes.  The mains supply and earthing lines 
must be of suitable size.  See section 7.1. 
 
The installation must be earthed and protected by fuses in each phase.  An isolating switch must be 
installed near the compressor.  Make sure that this switch is open to isolate the compressor from 
the mains before carrying out any connection. 
 
 
Connections 
 
Skid - Tank-mounted - Twin 
Connect the cable to terminals 1 and 3 (single-phase) or to terminals 1, 3 and 5 (3-phase) of pressure 
switch (4-Fig. 1.10).   Connect the earthing conductor to the earthing terminal.  SF Twin have a 
pressure switch for each compressor module;  provide for each pressure switch separate supply 
cables. 
 

9820 3744 61

     55103D

(1)

 

9820 3744 60

     55104D

(1)

 

Single-phase 3-phase 

 
Fig. 2.7 Service diagram, SF Skid - Tank-mounted – Twin 
 
Text on Fig. 2.7 
 
(1) Customer’s installation