Fronius Robacta PTW 3500 - Loading Limits Dependent on Plasma Gas Flow Rate (PTW 3500)

15
EN
Loading limits
dependent on the
plasma gas flow
rate
(continued)
Loading limit
example (PTW
1500)
In the case of a plasma nozzle with a diameter of 2.0 mm and a selected minimum
plasma gas flow rate of 0.35 l/min, a maximum welding current of 80 A is permitted for
the standard tungsten electrode setting.
∅∅
∅∅
∅ Plasma nozzle Plasma gas flow rate Max. welding current
2.0 mm min.1.0 l/min 170 A
2.5 mm min.1.0 l/min 190 A
3.2 mm min.1.0 l/min 210 A
3.5 mm min.1.0 l/min 225 A
4.0 mm min.1.0 l/min 250 A
Table is only valid for the PTW 3500 in conjunction with a CHILLY 15 cooling unit:
∅∅
∅∅
∅ Plasma nozzle Plasma gas flow rate Max. welding current
2.0 mm min.1.0 l/min 225 A
2.5 mm min.1.0 l/min 250 A
3.2 mm min.1.0 l/min 275 A
3.5 mm min.2.0 l/min 300 A
4.0 mm min.2.0 l/min 350 A
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:
- Amount of gas that makes working with the maximum welding current possible,
depending on the plasma nozzle
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.