Miller Electric NT 456 CC, Owner'S Manual

Page: 16 / 40

OM-2243 Page 12
SECTION 4 − INSTALLATION
4-1. Specifications
Model
Rated Welding
Output
Amperage/Voltage
Range
Max OCV − DC
Amperes Input at Rated Load
Output 60 Hz, Three-Phase
Model
Output Range
Max OCV − DC
230 V 460 V 575 V KVA KW
450 Amp
450 A @ 38 Volts
DC 100% Duty
5 − 500A In CC
Mode
78 VDC In
CC Mode
58 29 23 22.8 21.4
450 Amp DC, 100% Duty
Cycle
10 − 38V In CV
Mode
78 VDC In
CV Mode
*1.66 *0.83 *0.66 *0.66 *0.26
*While idling
4-2. 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.
NOTICE − Exceeding duty cycle
can damage unit and void warranty.
100% Duty Cycle
Overheating
0
15
A/V
OR
Reduce Duty Cycle
Minutes
duty1 4/95 / 210 976-B
Continuous Welding