Service manual theory of operation, Aintenance – Hypertherm Powermax900 Service Manual User Manual
Page 32
3-5
M
AINTENANCE
Service Manual
THEORY OF OPERATION
General
The Powermax900 is a multi-voltage, multi-phase power supply. The two inverter inputs are linked in
parallel for 208 or 240V on the 208/240/480V units, and for 200 or 230V on the 200/230/400V units.
The inverters are linked in
series for 480V on the 208/240/480V units, and for 400V on the 200/230/
400V units. The inverter links are located in the link box, behind the rear panel at TB3. See
Figs. 3-4, 3-5, 3-6. The 400V CE power supply does not have a link box.
Figure 3-4 200V or 208V
Configuration
Figure 3-5 230V or 240V
Configuration
TB2
Black
White
TB3
1
φ
1
φ
3
φ
3
φ
3
φ
Red
White
Black
TB2
Black
White
TB3
1
φ
1
φ
3
φ
3
φ
3
φ
Red
White
Black
Figure 3-6 400V or 480V
Configuration
TB2
Black
White
TB3
1
φ
1
φ
3
φ
3
φ
3
φ
Red
White
Black
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