KAESER TG 450, Руководство оператора, Страница: 21 / 116

Three-phase
Do NOT operate a package on any unsymmetrical power supply. Also do NOT operate a package
on power supplies, for example, a three-phase (open) delta or three-phase star with non-grounded
neutral.
The machine requires a symmetrical three-phase power supply transformer with a WYE configura‐
tion output as shown in Figure 2 and Figure 3. In a symmetrical three-phase supply the phase an‐
gles and voltages are all the same.
Other power supplies are not suitable.
Fig. 2 Three-phase (wye system); 4 wire; center point solidly grounded
Fig. 3 Three-phase (wye system); 3 wire; center point solidly grounded
Further information Please contact an authorized KAESER service representative for power supply options.
The electrical diagram 13.3 contains further specifications for electrical connection.
2.11 Power supply specifications
The following multi-strand copper core wires are given according to 2020 NEC 310.14, 310.15,
310.16 and table 310.16 adjusted 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 2020 NEC 110.14(C), 220.3, 310.14, 310.15, 310.16, table
310.15(B)(1), table 310.15(C)(1), 430.6, 430.22, 430.24, 670.4(A) and other local codes.
Dual element time delay fuses should be selected according to 2020 NEC 240.6, 430.52 and ta‐
bles 430.52, 430.248 and 430.250.
It is recommended to use a ground conductor the same size as the current carrying conductors, if
local codes allow. Neither the minimum ground wire size as pointed out in 2020 NEC table 250.122
nor using conduit as the sole ground connection is recommended.
2 Technical Data
2.11 Power supply specifications
No.: 901760 02 USE
Operator Manual Refrigerated Dryer
TG
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