Miller Electric OM-225A - Manual (Page 11)

OM-225 Page 9
SECTION 2 – INSTALLATION
2-1. Specifications
Input
Power
Rated Output
Amperes Input
at Rated Load
Output
Type of
Output
Plasma
Gas
Plasma
Gas Flow/
Rated
Cutting
Maximum
Open-
Circuit
Power
230 V 460 V KVA KW
Output Gas
Pressure Capacity Voltage
DC
Single-
Phase
50 A @ 110
Volts DC, 50%
Duty Cycle
48
(0.4*)
24
(0.2*)
11.2
(0.2*)
7.0
(0.1*)
Direct
Current, Air Or
5.3 CFM
(152 L/min)
5/8 in
3-Phase
50 A @ 110
Volts DC, 60%
Duty Cycle
23.2
(0.4*)
11.6
(0.2*)
9.1
(0.2*)
6.8
(0.1*)
Straight
Polarity
(DCEN)
Nitrogen
Only
(152 L/min)
At 70 PSI
(482 kPa)
(16 mm) At
10 IPM
340
*While idling
6 Minutes Cutting 4 Minutes Resting
5 Minutes Cutting 5 Minutes Resting
2-2. Duty Cycle And Overheating
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 and void
warranty.
Overheating
0
15
duty1 4/95 – Ref. ST-801 390
Minutes
A
OR
Reduce Duty Cycle
230 Or 460 VAC Three-Phase Input Power: 60% Duty Cycle At 50 Amperes
230 Or 460 VAC Single-Phase Input Power: 50% Duty Cycle At 50 Amperes