Tweco 300 TS Arcmaster(Feb2006) - Manual (Page 21)

15
3.03.02 Input Power
Each unit incorporates an INRUSH circuit and input voltage sensing circuit. When the MAIN INPUT
SWITCH is turned ON, the inrush circuit provides a pre-charging of the input capacitors. SCR’s in
the Power Control Assembly (PCA) will turn ON after the input capacitors have charged to full
operating voltage (after approximately 5 seconds).
Note 4
Note the available input power. Damage to the PCA could occur if 575VAC or higher is applied.
The following Primary Current recommendations are required to obtain the maximum welding current and
duty cycle from this welding equipment:
Current & Duty Cycle
Model
Primary Supply
Lead Size
(Factory Fitted)
Minimum Primary
Current Circuit Size
(Vin/Amps)
TIG STICK
208/31 -
230/28 -
8/4 AWG 460/14
300A @ 40%
-
minimum 208/45 -
230/41 -
3
Phase
460/21 -
300A @ 40%
8/3 AWG 208/51 -
minimum 230/46
250A @ 40%
-
208/76 -
ArcMaster
300 TS
1
Phase
230/68 -
250A @ 40%
Table 2 – 208-230/460V Primary Current Circuit sizes to achieve maximum current