Tweco 300 DC Arcmaster - Manual (Page 23)

ARCMASTER 300 ACDC
Februrary 22, 2006 3-3
3.05 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. At this point, the Bus Voltages are
checked and the welder is enabled after the input
capacitors have charged to full operating voltage (after
approximately 5 seconds).
NOTE
Note the available input power. Damage to the
welder 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:
Primary Minimum Current & Duty
Supply Primary Cycle
Model Lead Size Current
(Factory Circuit Size TIG STICK
Fitted) (Vin/Amps)
208/31 --
230/28 --
460/14
300 @
25%
--
208/45 --
230/41 --
3 φ
460/21 --
300 @
25%
208/67 --
230/60
300 @
25%
--
208/97 --
ARC
MASTER
300ACDC
8/4 AWG
minimum
1 φ
230/87 --
300 @
25%
Table 3-2 208/230V Primary Current Circuit sizes to
achieve maximum current
3.06 High Frequency Introduction
The importance of correct installation of high frequency
welding equipment cannot be over-emphasized.
Interference due to high frequency initiated or stabilized
arc is almost invariably traced to improper installation.
The following information is intended as a guide for
personnel installing high frequency welding machines.
WARNING: EXPLOSIVES
The high frequency section of this machine
has an output similar to a radio transmitter.
The machine should NOT be used in the
vicinity of blasting operations due to the
danger of premature firing.
WARNING: COMPUTERS
It is also possible that operation close to
computer installations may cause computer
malfunction.