EN
INVERTER WELDING MACHINE
USER’S MANUAL
11
Installation instruction
5. Please pay attention to the connecting terminal, DC welding machine has two connecting ways: positive
connection and negative connection. Positive connection: holder connects with “-” terminal, while work piece
with the “+” terminal. Negative connection: work piece with the “-” terminal, holder with the “+” terminal.
Choose suitable way according to the working situation. If unsuitable choice is made, it will cause unstable
arc, more spatters and conglutination. If such problems occur, please change the polarity of the fastening
plug.
6. According to input voltage grade, connect power cable with power supply box of relevant voltage grade.
Make sure no mistake is made and make sure the voltage difference is among permission range. After the
above job, installation is finished and welding is available.
WARNING!
If distance of work piece and machine is too far (50–100m), and the cables (torch cable
and earth cable) are too long, please choose cable of bigger section to minimize the
reduction of the voltage.
