Daihen CPVE-400, Руководство пользователя, Страница: 15 / 87

－
13
－
6. NECESSARY POWER SOURCE EQUIPMENT
6.1 Welding Power Source Equipment (commercial power supply)
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 fuses or a circuit breaker (for motor) to the input sides of
each welding machine.
 Capacity of Necessary Power Source Utility
Specification CPVE-400 CPVE-500
Supply voltage Three-phase 380 V / 415 V Three-phase 380 V / 415 V
Tolerance range of fluctuation
of supply voltage
380 V / 415 V ±10% 380 V / 415 V ±10%
Installed capacity 23 kVA or more 30 kVA or more
Capacity of switch, electric
leakage breaker
40 A 50 A
6.2 Precautions for Use of the Engine Generator or the auxiliary power of an engine welder
CAUTION

Use the auxiliary power of an engine welder with an improved voltage waveform when it is
used as power source for welding machine. Some engine welders have poor electricity,
which may cause product damage. Contact an engine welder manufacture for
improvement of voltage waveform.
CAUTION
To prevent the engine generator or auxiliary power from being damaged, follow the
instructions below.

Set the output voltage of the engine generator to voltage range between 415 and 456V at
no-load welding operation. Setting to an extremely high output voltage may result in
product damage.

Use the engine generator with a damper winding that has a capacity of more than twice that
of 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 an abnormal decrease in output
current or arc loss. Ask an engine generator manufacturer for a damper winding.

Do not combine more than two welding machines with a single engine generator. The effect
of each welding machine may cause easy loss of arc.
Wminfo