Tweco 400 Ultra-Cut - Manual (Page 27)

Manual No. 0-5164 3-1 INSTALLATION
ULTRA-CUT 400
SECTION 3: INSTALLATION
3.01 Installation Requirements
Electric Supply
The electrical supply network, the gas and water supply system must meet local safety standards. This
conformity shall be checked by qualified personnel.
Ultra-Cut 400 Power Supply
Input Power Input Current Suggested Sizes (See Note)
Voltage Freq. 3-Ph 3-Ph Fuse (Amps) Wire (AWG) Wire (mm 2 )
(Volts) (Hz) (kVA) (Amps) 3-Ph 3-Ph 3-Ph
208 50/60 119 336 350 300MCM 150
230 50/60 119 304 350 250MCM 150
460 50/60 116 148 175 #1 50
380 50/60 120 183 225 1/0 70
400 50/60 120 174 225 1/0 70
* Suggested wire size based on United States NFPA 70 National Electrical Code 2005 edi-
tion published by the National Fire Prevention Association.
Listings are from table 400.5(B) for flexible cord of certain types rated for 75 deg C in
ambient temperatures up to 30 deg C. Using wires of lower temperature rating or differ-
ent insulation type may require larger wire size. Derate for higher ambient.
These are suggestions only. Always refer to your local and national codes that apply to
your region for final determination of correct wire type and size.
CAUTION
Fuse and wire sizes are for reference only. The installation must conform to national and local codes for
the type and method of wire being used.
Gas Supply
The customer must supply all gases and pressure regulators. Gases must be of high quality. Pressure
regulators must be double-stage and installed as close as possible to the gas console. Contaminated gas
can cause one or more of the following problems:
• Reduced cutting speed
• Poor cut quality
• Poor cutting precision
• Reduced consumables life.
• Oil or grease contamination from compressed or bottled air can cause fires in conjunction with oxygen.
Cooling System Requirements
Coolant must be added to the system on installation. The amount required varies with torch leads length.
Thermal Dynamics recommends the use of its coolants 7-3580 and 7-3581 (for low temperatures).