Duty Cycle And Overheating; Cutting Speed - Miller Spectrum 300 Manuel Du Propriétaire

3-2. Duty Cycle And Overheating

115 VAC Input Power: 35% Duty Cycle At 20 Amperes, 20 Ampere Input Circuit
115 VAC Input Power: 35% Duty Cycle At 25 Amperes, 30 Ampere Input Circuit
230 VAC Input Power: 35% Duty Cycle At 25 Amperes
3-1/2 Minutes Cutting
Overheating

3-3. Cutting Speed

Recommended production cutting speed vs. material thickness is
approximately 10 imp at 5/16 in mild steel thickness at max setting.
6-1/2 Minutes Resting
0
15
Reduce Duty Cycle
Minutes
Duty Cycle is percentage of 10 min-
utes that unit can cut at rated load
without overheating.
If unit overheats, thermostat(s)
opens, output stops, Temperature
trouble light goes On, and cooling
fan runs. Wait fifteen minutes for
unit to cool or temperature light to
go off. Reduce amperage or duty
cycle before cutting or gouging.
Y Exceeding duty cycle can
damage unit
warranty.
A
OR
The cutting speed curves show the
recommended maximum cutting
speed capabilities of the power
source and torch for mild steel of
various thickness.
Cut at speeds below the lines
shown to avoid poor cuts and torch
wear.
OM-2210 Page 11
and void
sduty1 5/95
ST-179 507