Tweco 185TSW DC CC - Manual (Page 18)

18
3.03.02 Input Power
Each unit incorporates an INRUSH circuit and input voltage sensing circuit. When the MAIN
CIRCUIT 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 3
Note the available input power. Damage to the PCA could occur if 460VAC or higher is
applied.
The following 208/230V 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
230/29
208/32
185 @ 30%
230/38 -
Pro-Wave
185TSW
12/3 AWG
minimum
208/40 -
160 @ 40%
Table 2 – 208/230V Primary Current Circuit sizes to achieve maximum current