15
2.05.02 Input Power
Each unit incorporates an INRUSH circuit and input voltage sensing circuit. When the MAIN 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 5
Note the available input power. Damage to the PCA could occur if 575VAC or higher is applied.
The following 208-230/460V 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
Minimum Primary
Current Circuit Size
(Vin/Amps)
MIG TIG STICK
208/41
- -
230/37
- -
460/19
300A @
40%
-
-
208/31
- -
230/28
- -
460/14
-
300A @
40%
-
208/45
- -
230/41
- -
8/4 AWG minimum
(Factory Fitted)
3
Phase
460/21
- -
300A @ 40%
208/55
- -
230/49
250A @
40%
-
-
208/41
- -
230/37 -
250A @
40%
-
208/61
- -
ARC
MASTER
300 MST
8/3 AWG minimum
1
Phase
230/55 - -
250A @ 40%
Table 2 – Primary Current Circuit Sizes to Achieve Maximum Current
