Hypertherm HyPerformance HPR400XD, Instruction Manual

Page: 88 / 355

InstallatIon
3-50 HPR400XD Auto Gas – 806160
Power requirements
general
All switches, slow-blow fuses and power cables are customer-supplied and must be chosen as outlined by applicable
national and local electrical codes. Installation must be performed by a licensed electrician. Use a separate, primary, line
disconnect switch for the power supply. Recommendations on fuse and circuit breaker sizing are listed below, however
actual sizes required will vary based on individual site electrical line conditions (including but not limited to: source
impedance, line impedance, and line voltage fluctuation), product inrush characteristics, and regulatory requirements.
The main feed protection device (circuit breaker or fuse) must be sized to handle all branch-feed loads for both inrush
and steady-state current. The power supply must be wired into one of the branch-feed circuits. The power supply has a
steady-state current listed in the table below.
Use a motor-start circuit breaker or equivalent if time delay high inrush fuses are not permitted by local and national
codes. Time delay fuses and circuit breakers must be capable of withstanding inrush current that is up to 30 times the
rated input current (FLA) for 0.01 seconds and up to 12 times the rated input current (FLA) for 0.1 seconds.
Note: Cable AWG recommendations taken from table 310-16 of the National Electric Code handbook (USA).
Input voltage Phase
Rated
input current (FlA)
@ 80 kw output
Recommended
time delay,
high inrush
fuse size
Recommended cable size for 15 m
(50 ft) maximum length
Rated for 90°c (194°F)
200/208 VAc 3 262/252 amps 325 amps 235 mm
2
(350 MCM)
220 VAc 3 238 amps 300 amps 201.1 mm
2
(300 MCM)
240 VAc 3 219 amps 275 amps 167.5 mm
2
(250 MCM)
380 VAc 3 138 amps 175 amps 67.5 mm
2
(2/0 AWG)
400 VAc 3 131 amps 175 amps 67.5 mm
2
(2/0 AWG)
440 VAc 3 120 amps 150 amps 53.5 mm
2
(1 AWG)
480 VAc 3 110 amps 150 amps 53.5 mm
2
(1 AWG)
600 VAc 3 88 amps 110 amps 26.7 mm
2
(3 AWG)