Panasonic YD-630AT Operating Instructions Manual page 14

9、Cautions
（1）The operation of the power switch in the frontal panel
When the power is automatically switched OFF, never re-switch ON the power again.

Please contact your dealer for help. If re-switch ON the power without removing the
trouble that may enlarge the trouble or damage the power source.
Turn off the power switch waiting for more 2~ 3 minutes after finishing welding so

that the fan wound cool the power source enough.
（2）The connection between the output ends and electrode holder, output cable.
Only plug one electrode holder or one cable into one output end.

It is mustn't that use the two output ends signed "+" simultaneity for welding.

（3）The output cable
Please use the output cables including holder cable and base-metal cable as uncurly as

possible.
（4）Warning lamp
Please refer to the check points for abnormal operation as below when any lamp

lights.
（5）The duty cycle
 The rated duty cycle of this model is 60% that means to use the rated welding current
630A for 6 minutes out of 10 minutes and suspend operation for remaining 4 minutes.
The permitted welding current is different as the varied duty cycle in the practical welding

as follows:
Table 9.1
Duty cycle
Welding current (A)
（6）Keep and storage
 For the safety, please don't store the machines over 3 layers and keep them immobile with
the rope.
(%) 60
630
11
80 100
545 488