Tweco 200 ACDC Arcmaster(Feb2006) User Manual

Page 21

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 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 (Factory

Fitted)

Minimum Primary

Current Circuit Size

(Vin/Amps)

TIG STICK

208/18 -
230/16 -

460/8

200 @ 20%

208/21 -
230/19 -

Phase

460/10 -

160 @ 40%

208/36 -
230/33

200 @ 20%

208/42 -

ArcMaster
200 ACDC

8/4 AWG minimum

Phase

230/38 -

160 @ 40%

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

The ARCMASTER 200 ACDC is designed for use with a generator as an input power source. Contact an
accredited Thermal Arc service agent for the proper sizing and set-up recommendations of a generator power
source system. As a general rule, depending on the type of generator used, the generator capacity should be
twice the maximum rating of the welder.