Miller Electric NT 450 - Manual (Page 17)

OM-2252 Page 13
SECTION 4 − INSTALLATION
4-1. Specifications
Model
Rated
Welding
Amperage/
Voltage Range
Max OCV−DC
Amperes Input at Rated Load Output 50/60 Hz,
Three-Phase
Model Welding
Output
Voltage Range
Max OCV−DC
230 V 380 V 400 V 440 V 460 V 575 V KVA KW
450 Amp
450 A @ 38
Volts DC 100%
5 − 500A In CC
Mode
78 VDC In
CC Mode For
60 Hz
80 VDC In CC
Mode For 50 Hz 57 34 33 30 29 23 22.6 21.0
450 Amp Volts DC, 100%
Duty Cycle
10 − 38V In CV
Mode
78 VDC In
CV Mode For
60 Hz
80 VDC In CV
Mode For 50 Hz
*2.18 *1.11 *1.05 *.950 *1.04 *0.84 *0.87 *0.29
*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