Other power supplies are not suitable.
Fig. 2 Three-phase star (wye system); 4 wire; center point solidly grounded
Fig. 3 Three-phase star (wye system); 3 wire; grounded center point solidly grounded
Further information Please contact an authorized KAESER service representative for options.
The electrical diagram 13.4 contains further specifications for electrical connection.
2.14 Power supply specifications
The following multi-strand copper core wires are given according to 2014 NEC 310.15, Ta‐
ble 310.16 for 104°F ambient temperature.
If other local conditions prevail, like for example high temperature, the cross section should be
checked and adjusted according to 2014 NEC 110.14©, 220.3, 310.15, Table 310.16, 430.6,
430.22, 430.24 and other local codes.
Dual element time delay fuses are selected according to 2014 NEC 240.6, 430.52 and ta‐
bles 430.52, 430.248 and 430.250.
We strongly suggest using a separate copper conductor for the equipment GROUNDING. NEC
Table 250.122 will point out the ”minimum size”, however, we recommend a ground conductor the
same size as the power leads, if local codes allow.
Rated power supply 208V / 3-ph / 60Hz
SM 7.5 SM 10 SM 15
Pre-fuse [A] 30 45 60
Supply 4xAWG8 4xAWG6 4xAWG4
Consumption [A] 23 32 40
Tab. 16 Supply details 208V / 3ph / 60Hz
Rated power supply 230V / 3-ph / 60Hz
SM 7.5 SM 10 SM 15
Pre-fuse [A] 30 45 50
Supply 4xAWG8 4xAWG6 4xAWG4
Consumption [A] 22 30 38
Tab. 17 Supply details 230V / 3ph / 60Hz
2 Technical Data
2.14 Power supply specifications
10
Operator Manual Screw Compressor
SM Tri-Voltage, SIGMA CONTROL 2 9_5875 33 USE
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