Hypertherm Powermax125 Service Manua - Manual (Page 33)

Powermax125 Service Manual 808070 33
2 – Power Supply Setup
Table 7 – 380 V CCC
Three-phase power cord and plug installation
Powermax125 power supplies ship with the following power cords:
 CSA models: 8 AWG 4-wire power cord (no power plug included)
 CE models: 10 mm 2 4-wire HAR power cord (no power plug included)
CCC certified configurations do not ship with a power cord. To maintain CE certification, install power cord kit 228886.
If you need to install a different power cord on the system, the cable you use must have a diameter within one of the
following ranges to ensure a proper fit in the power cord strain relief:
 CSA and CCC models: 15.0 – 25.4 mm (0.59 – 1.00 inches)
 CE models: 20.0 – 25.9 mm (0.79 – 1.02 inches)
To operate the Powermax, use a plug that meets national and local electrical codes. The plug must be connected to the
power cord by a licensed electrician.
Decrease output current for lower-rated power plugs
To operate the power supply at full output and 100% duty cycle as rated, you must size your electrical service
accordingly. To operate the power supply using a lower-rated power plug or service, you must turn down the current
(amperage setting).
 For more information on setting the current, see Adjusting the current (amperage) on
page 48.
Example: Table 8 shows the recommended output current for operating a 400 V CE power supply installed with a 32 A
power plug. To operate at 400 V in this scenario, run the power supply at 109 A to maintain 100% duty cycle.
Table 8 – Recommended ratings for operating 400 V CE unit on 32 A power plug
Input voltage (V) 380
Input current (A) at rated output (21.9 kW) 38
Input current (A) at arc stretch 55
Fuse, slow-blow (A) 60
Voltage tolerance +20% / -15%
Input voltage Phase Recommended output current to maintain 100% duty cycle
380 V 3 104 A
400 V 3 109 A
415 V 3 114 A