Metabo Invert 130/60 - Manual (Page 5)

Column a) need not be used if the duty cycle (duty factor) for the rated maximum welding
current is 60 % or 100 %.
Column b) need not be used if the duty cycle (duty factor) at the rated maximum welding current is 100 %.
c) Energy input
Box 14 Energy input symbol e.g.:
Input supply, number of phases (e.g. l or 3), symbol for
alternating current
and the rated frequency (e.g. 50 Hz or 60 Hz)
Engine
Motor
Belt drive
Box 22 IP.. Degree of protection, e.g. IP21 or IP23.
Box 23 Symbol for protection class II, if applicable.