Thermal Arc pro-life 250s, Operating Manual

Page: 24 / 62

3.03.02 Input Power
Each unit incorporates an INRUSH circuit and input voltage sensing circuit. When the MAIN
CIRCUIT BREAKER 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 575VAC or higher is
applied.
The following 380/415V 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/Phase/Amps) TIG STICK
380/3/13 -
415/3/11
250A @ 40%
-
380/3/19 -
PRO-LITE 250S 4mm sq / 4 minimum
415/3/17 -
250A @ 40%
Table 2 – 230/460V Primary Current Circuit sizes to achieve maximum current
PRO-LITE 250S
June 29, 2005 24