Tweco 300 DC Arcmaster - Manual (Page 28)

ARCMASTER 300 ACDC
4-2 February 22, 2006
3. Positive Terminal: Welding current flows from the
Power Source via heavy duty Dinse type terminal. It
is essential, however, that the male plug is inserted
and turned securely to achieve a sound electrical
connection.
4. Negative Terminal: Welding current flows from the
Power Source via heavy duty Dinse type terminal. It
is essential, however, that the male plug is inserted
and turned securely to achieve a sound electrical
connection.
CAUTION
Loose welding terminal connections can cause
overheating and result in the male plug being
fused in the bayonet terminal.
5. Gas Outlet: The Gas Outlet is a 5/8 18 UNF female gas
fitting.
6. ON/OFF Switch: This switch connects the Primary
supply voltage to the inverter when in the ON position.
This enables the Power Supply.
WARNING
When the welder is connected to the Primary
supply voltage, the internal electrical
components maybe at 720V potential with
respect to earth.
7. Input Cable: The input cable connects the Primary
supply voltage to the equipment.
8. SMART Logic Switch: Manual slide switch mounted
on the back panel selects for proper input voltage. If
this slide is not set to the position that matches the
input voltage from the electrical source the Smart
Logic circuit will inhibit welding power source output.
The digital meter will show primary input error code.
8 . Gas Inlet: The Gas Inlet is a 5/8 18 UNF female gas
fitting.