Fig. 2 Three-phase star (wye); 4 wire; grounded neutral
Fig. 3 Three-phase star (wye); 3 wire; grounded neutral
Further information Please contact authorized KAESER Service representative for options.
The electrical diagram 13.4 contains further specifications for electrical connection.
2.15 Power supply specifications
The following multi-strand copper core wires are given according to 2008 NEC 310.15, Table 310.16
for 40 °C ambient temperature.
If other local conditions prevail, like for example high temperature, the cross section should be
checked and adjusted according to 2008 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 2008 NEC 240.6,430.52 and tables 430.52,
430.248 and 430–.250.
We strongly suggest using a separate copper conductor for the equipment GROUNDING. NEC Ta‐
ble 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.
Mains voltage: 400V±10%/3/60Hz
SX 3
SX 7.5
Pre-fuse[A]
10
20
Supply
4xAWG14
4xAWG14
Consumption [A]
6.3
12
Tab. 15 Connection data
Mains voltage: 460V±10%/3/60Hz
SX 3
SX 7.5
Pre-fuse[A]
10
15
Supply
4xAWG14
4xAWG14
Consumption [A]
5.7
10.7
Tab. 16 Connection data
2
Technical Data
2.15 Power supply specifications
Number: 9_6945 01USE
Service manual Screw compressor
Aircenter SX 3/7.5 SIGMA CONTROL BASIC
9
