Hypertherm HT2000, Instruction Manual

Page: 46 / 289

PRE-INSTALLATION
HySpeed HT2000
Instruction Manual
3-5
19
Power Requirements
All switches, slow-blow fuses and power cables are customer supplied and must be chosen as
outlined by applicable national and/or local electrical codes. Installation must be performed by
qualified personnel.
Use a separate primary line disconnect switch for the power supply. Size the disconnect box to the following
requirements:
Rated Input
Input Current @ Recommended
Voltage Phase 30 kw Output Slow-Blow Fuse Size
200 VAC 3 108 amps 150 amps
208 VAC 3 104 amps 150 amps
220 VAC 3 98 amps 150 amps
240 VAC 3 90 amps 150 amps
380 VAC 3 57 amps 80 amps
400 VAC 3 56 amps 80 amps
415 VAC 3 52 amps 70 amps
440 VAC 3 49 amps 70 amps
480 VAC 3 45 amps 60 amps
600 VAC 3 36 amps 50 amps
Line Disconnect Switch
The line disconnect switch serves as the supply voltage disconnecting (isolating) device. Install this switch on
a wall near the power supply for easy accessibility by the operator.
The line disconnect switch must be
installed by qualified personnel following all applicable local and national codes. The switch should:
• Isolate the electrical equipment and disconnect all live conductors from the supply voltage when in "OFF"
position
• Have one "OFF" and one "ON" position clearly marked with "0" (OFF) and "1" (ON)
• Have an external operating handle capable of being locked in the "OFF" position
• Contain a power operated mechanism that serves as an emergency stop
• Have slow-blow fuses installed for the proper breaking capacity (see table above)
Power Cable
Power Source to Power Supply
Wire sizes vary based on the distance of the receptacle from the main box. The wire sizes listed on the
following page were taken from the National Electric Code 1990 handbook, table 310.16.
Use a 4-conductor