This machine may only be supplied from a grounded TN or TT three-phase supply in which the neutral
point is grounded.
The machine may not be connected to a three-phase supply in which one of the phases is grounded,
as this can lead to dangerous voltage surges.
Connection to an IT network is not permitted without further measures being taken (ground leak
detection, specially designed frequency converter, etc.).
Further information The wiring diagram in chapter 13.4 contains further details of the power supply connection.
2.14 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 240.6,430.52and 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.
Rated power supply 208V ±10%, 3-ph, 60Hz
BSD 40 BSD 50 BSD 60
Pre-fuse [A] 175/150* 200 —
Supply 4x AWG2/0** 4x AWG4/0** —
Consumption [A] 121 146 —
** 75 °C
Tab. 19 Supply 208V/3/60Hz
Rated power supply 230V±10%/3/60Hz
BSD 40 BSD 50 BSD 60
Pre-fuse [A] 150 175 —
Supply 4x AWG2/0**/
AWG1/0** *
4x AWG3/0** —
Consumption [A] 108/105* 131/128* —/—*
* Option K2
** 75 °C
Tab. 20 Connection details 230V/3/60Hz
2 Technical Data
2.14 Power Supply Specifications
10
Service Manual Screw Compressor
BSD 9_5708 08 USE
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