Section 2 - Installation; Specifications; Duty Cycle And Overheating - Miller Electric OM-225A Owner's Manual

2-1. Specifications

Input
Rated Output
Power Power
50 A @ 110
Single-
Volts DC, 50%
Phase
Duty Cycle
50 A @ 110
Volts DC, 60%
3-Phase
Duty Cycle
*While idling

2-2. Duty Cycle And Overheating

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