Fronius Robacta PTW 500 Instructions De Service page 39

Loading limits
∅ ∅ ∅ ∅ ∅ Plasma nozzle
dependent on the
2.0 mm
plasma gas flow
2.5 mm
rate
(continued)
3.2 mm
3.5 mm
4.0 mm
Table is only valid for the PTW 3500 in conjunction with a CHILLY 15 cooling unit:
∅ ∅ ∅ ∅ ∅ Plasma nozzle
2.0 mm
2.5 mm
3.2 mm
3.5 mm
4.0 mm
Minimum plasma gas flow rate:
Amount of gas at which the welding arc still remains stable.
Important! Welding using a minimum plasma gas flow places a severe load on the
plasma nozzle and should be avoided.
Maximum plasma gas flow rate:
-
Maximum welding current:
Welding current permitted when using a particular plasma nozzle, standard tungsten
electrode setting and minimum or maximum plasma gas flow rate.
Important! Use pure argon as plasma gas. The limit values listed above can only be
obtained using pure argon.
Loading limit In the case of a plasma nozzle with a diameter of 2.0 mm and a selected minimum
example (PTW plasma gas flow rate of 0.35 l/min, a maximum welding current of 80 A is permitted for
1500) the standard tungsten electrode setting.
Amount of gas that makes working with the maximum welding current possible,
depending on the plasma nozzle
Plasma gas flow rate
min.1.0 l/min
min.1.0 l/min
min.1.0 l/min
min.1.0 l/min
min.1.0 l/min
Plasma gas flow rate
min.1.0 l/min
min.1.0 l/min
min.1.0 l/min
min.2.0 l/min
min.2.0 l/min
15
Max. welding current
170 A
190 A
210 A
225 A
250 A
Max. welding current
225 A
250 A
275 A
300 A
350 A