YASKAWA MOTOWELD-T300D, Instructions Manual

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4.2 Required Power Supply Facility Capacity and Connection Cables
CAUTION
•
Be sure to use cables for welding with sufficient thickness.
Excessively thin cables may cause abnormal heating resulting in burn or fire.
•
If the output cable is extended, do not use the cable while it is still wound. Otherwise, an output
resistance increase will interrupt assurance of start performance. Be sure to straighten it up to
20 m as standard.
Failure to observe this caution may result in malfunction.
“Table 4.1 Power Supply Facility Capacity and Connection Cables” shows the required
power supply facility capacity and connection cables.
Since a voltage compensation circuit is provided for the welder, welding is possible
without any problems even if power supply voltage is fluctuated within ±10% from rated
power supply voltage. However, use as stable a power supply as possible for proper
welding. If voltage varies more than 10% from rated power supply voltage, proper
welding conditions cannot be established, resulting in device problems.
For safe operations, be sure to attach a no-fuse breaker or a switching device with fuse for
each welder.
When a no-fuse breaker is used, it must satisfy rated current in Table 4.1 and trip at 600%
current of rated current for one minute or more (generally, it will be a breaker for motor).
If the breaker has too small a rating or power supply voltage is too high, the breaker may
trip when the welder is turned ON.
Table 4.1 Power Supply Facility Capacity and Connection Cables
Model
YWE-T30D (0)
Rated output current
TIG 300D
(Three-phase 200/220 V)
Power supply facility capacity Three-phase 14 kVA or more
Fuse capacity 50 A
Input cable 8 mm
2
or more
Output cable 38 mm
2
or more
Ground cable 14 mm
2
or more