Tweco 400 TS Arcmaster User Manual

Page 22

3.03.02 Input Powe

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

Minimum Primary

Current Circuit Size

(Vin/Amps)

TIG STICK

Model

Primary Supply

Lead Size

(Factory Fitted)

208/49
230/44 -
460/22

400A @ 25%

208/67 -
230/61 -

Phase

460/31 -

400A @ 25%

208/67 -
230/60

300A @ 25%

208/97 -

ARCMASTER

400 TS

8/4 AWG minimum

Phase

230/87 -

300A @ 25%

Table 2 – 208-230/460V Primary Current Circuit sizes to achieve maximum current