INSTALLATION AND ADJUSTMENT
15
Movement may result in the potential danger or substantive hazard, so please make sure that the
machine is in a safe position before using it.
3.4 Power supply input connection
ARCOTIG HF 315 AC/DC welding machines’ power supply connects to 3-phase 380V
（
3-phase
220V
）
Note: Please refer to the nameplate about the right power supply connection (three phase 220v
or three phase 380v). Incorrect power connection may cause machine failure!
When the power supply voltage is over the safe work voltage, there are over voltage and under
voltage protections inside the welder, the alarm light will be activated, at the same time, the
current output will be cut off.
If the power supply voltage continually goes beyond the safe work voltage range, it will shorten
the welder’s lifespan. The below measures can be used:
Change the power supply input net. Such as, connect the welder with the stable power
supply voltage of distributor;
Reduce the machines power output to safe limits.
Set the voltage stabilization device in the front of power cable input.
3.5 Polarity Connection
（
MMA
）
MMA (DC): Choosing the connection of DCEN or DCEP according to the different electrodes.
Please refer to the electrode manual.
MMA (AC): No requirements for polarity connection.
take ArcoTig HF250W/315W ACDC as an example
