Tweco 300 S Arcmaster - Manual (Page 28)

ARCMASTER ® 300 S
March 31, 2006 4-4
4.04 Power Source Features
Feature Description
New Digital Control • Almost all welding parameters are adjustable
Touch Panel Switches • Touch switches eliminate mechanical damage
Front Control Cover • Protects front panel controls
Digital Meter
• Displays selected weld parameter value
• Displays weld current when welding
• Displays weld current for 20 seconds after weld has been
completed
• A selected weld parameter value can be adjusted at any time
even while welding
Intelligent Fan Control
• The intelligent cooling system is designed to reduce dust and
foreign material build-up, whilst providing optimum cooling.
• Fan speed reduces approximately 30 seconds after machine
is turned on
• Fan speed increases when internal components reaches
operating temperature
ON/OFF switch • Primary voltage Supply ON/OFF switch located on rear panel
Voltage Reduction Device (VRD)
Reduces the OCV when the power supply is not in use. Eliminates
the need for add on voltage reducers and has no effect on arc
starting.
• VRD fully complies to IEC 60974-1
• When Stick mode is selected the green VRD light is ON when
not welding and red when welding.
• When in TIG modes VRD is off.