No. P10355
|12|
6. NECESSARY POWER SOURCE EQUIPMENT
6.1 Welding Power Source Equipment (for commercial use)
WARNING
When the welding machine is used in such a humid environment as construction site, on the
steel plate, or on steel structure, install a leakage breaker.
CAUTION
Be sure to install a switch with fuse or a circuit breaker (for motor) to the input sides of each
welding machine.
Capacity of Necessary Power Source Utility
MODEL
DIGITAL INVERTER
DP-400
Power supply voltage 208/230/460V, Three phase
The welding power source links the
primary voltage automatically.
Tolerance range of fluctuation of power supply voltage 208/230/460V±10%
Installed capacity 24kVA or more
Capacity of switch/circuit breaker 70 A for 208/230V, 50A for 460V
6.2 Precautions for Use of the Engine Generator
CAUTION
Use the auxiliary power of engine welder whose voltage waveform has been improved. Some
of the engine welders have poor electricity, which may cause product damage. Contact an
engine welder manufacturer for improvement of waveform.
To prevent the engine generator or auxiliary power from being damaged, follow the instructions
below.
x
Set the output voltage of the engine generator to the voltage range between 230 and 240V at
no-load welding operation. Setting to extremely high output voltage may result in product damage.
x
Use the engine generator with a damper winding of which capacity is more than twice as much as
the rated input of the welding machine. Generally, the recovery time of the engine generator’s
voltage for load change is slower than that of the commercial input power source, and if the engine
generator does not have sufficient capacity, sudden current change such as arc start will occur.
This may result in abnormal decrease in output current or arc loss. Ask an engine generator
manufacturer for a damper winding.
x
Do not combine more than two welding machines with an engine generator. The affect of each
welding machine may cause easy loss of arc.
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