Miller Electric SRH-503 - Manual (Page 15)

OM-2236 Page 11
SECTION 4 − INSTALLATION
4-1. Specifications
Rated Welding
Amperes Input at Rated Load
Output, 60 Hz, Three-Phase
Model
Rated Welding
Output Amp Range DC Max OCV DC 220-230 V 440-460 V KVA KW
500 Amp
500 A @ 40 Volts DC,
60% Duty Cycle
50 − 525
77
98
4.5*
49
2.2*
38.9
1.8*
26
0.7*
*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.
Y Exceeding duty cycle can
damage unit and void
warranty.
Overheating
0
15
V
OR
Reduce Duty Cycle
Minutes 205 909
60% Duty Cycle At 500 Amperes For 500 Ampere Models
6 Minutes Welding 4 Minutes Resting
10 20 30 40 50 60 70 80 90100
100
200
300
400
500
600
700
800
900
1000
% DUTY CYCLE
WELD AMPERES