Miller Electric 456 CV - Manual (Page 17)

OM-188 422 Page 13
SECTION 3 – INSTALLATION
3-1. Specifications
Input
Power
Rated Welding
Output
Amperage
Range
Voltage
Range
Maximum
Open-
Circuit
Amperes Input
At Rated Load
Output 60 Hz,
Three-Phase
Voltage DC
400 V KVA KW
Three
Phase
450 A @ 38 Volts DC,
100% Duty Cycle;
565 A @ 38 Volts DC,
60% Duty Cycle
5 – 600 10 – 38 95 31 21.6 19.4
3-2. 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
duty cycle before welding.
Y Exceeding duty cycle can
damage unit and void war-
ranty.
Overheating
0
15
A/V
OR
Reduce Duty Cycle
Minutes
duty1 4/95 – SA-181 560
Continuous Welding
100% Duty Cycle At 450 Amperes 60% Duty Cycle At 565 Amperes
6 Minutes Welding 4 Minutes Resting