Hypertherm HD3070 Plasma Arc Cutting System w/ Automatic Gas Console - Manual (Page 54)

3-6 HD3070 with Automatic Gas Console Instruction Manual
16
INSTALLATION
Power Requirements
All switches, slow-blow fuses and power cables are customer supplied and must be chosen as directed by
applicable national and/or local electrical codes.
Use a separate primary line disconnect switch for each HD3070 power supply and slave.
Note: Input voltage must not drop below 15% of the values listed below. The power supply will go into an idle
mode and display an error on the control board if the input voltage is too low
Size the disconnect box(es) to Table 3-1 requirements for the HD3070 power supply.
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 the OFF
position
• Have one OFF and one ON position clearly marked with “0 (OFF)” and “I (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 (Table 3-1)
Power Cable
The power cable is customer supplied. Use an 8-4 conductor Type SO input power cable with a conductor
temperature rating of 140°F (60°C).
WARNING
Electrical installation must be performed by qualified personnel only.