Miller Regency 250 - Specifications; Duty Cycle And Overheating

OM-293 Page 9
SECTION 2 − INSTALLATION
2-1. Specifications
Rated Welding
Output
Voltage Range
DC
Maximum Open-
Circuit Voltage
DC
Amperes Input at Rated Load Output, 60
Hz, Single-Phase
Output
DC
Circuit Voltage
DC
200 V 230 V 460 V 575 V KVA KW
250 A @ 28 Volts DC,
40% Duty Cycle
Low Range:
10−20 V; High
Range: 20−30 V
42
46
(1.2*)
40
(1.0*)
20
(0.5*)
16
(0.4*)
9.2
(0.2*)
8.3
(0.1*)
*While idling
2-2. Duty Cycle And Overheating
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
If unit overheats, thermostat(s)
opens, output stops, and cooling
fan runs. Wait fifteen minutes for
unit to cool. Reduce amperage or
voltage, or duty cycle before
welding.
Y Exceeding duty cycle can
damage unit and void war-
ranty.
Overheating
0
15
A or V
OR
Reduce Duty Cycle
Minutes
sduty1 5/95 / ST-155 647-A
40% Duty Cycle At 250 Amperes
4 Minutes Welding 6 Minutes Resting