Miller Spectrum 875 User Manual

. A complete Parts List is available at www.MillerWelds.com
OM-264259 Page 11
SECTION 4 − SPECIFICATIONS
4-1. Serial Number And Rating Label Location
The serial number and rating information for this product is located on the bottom. Use rating label to determine input power requirements and/or rated
output. For future reference, write serial number in space provided on back cover of this manual.
4-2. Unit Specifications
. Do not use information in unit specifications table to determine electrical service requirements. See Sections 5-5 and 5-7 for information on con-
necting input power.
. This equipment will deliver rated output at an ambient air temperature up to 1045F (405C).
A. Power Supply
Input
Rated AC phase (PH) and line frequency (Hz) 1 phase, 50 / 60 Hz
Rated Input Voltage (U
1
) and rated Input
Current (I
1
) and I
1
eff at rated output. I
1
eff
used to determine power cord rating
Volts AC RMS − (U
1
) Amps RMS − (I
1
) I
1
eff
208 Volts AC 1 Phase 46.9 29.7
230 Volts AC 1 Phase 41.6 29.4
Power Factor/KVA/KW at Rated Output
Volts AC RMS − (U
1
) Power Factor KVA/KW
208 0.99 9.92/9.85
230 0.99 9.71/9.66
Peak KW at Arc Stretch 15.5 KW
Output
Rated Open Circuit Voltage (U0) Type 400 Volts DC/Electrode Negative
Output Characteristic Constant Current
Output Current Rating (I2) 60 A
Output Voltage Rating (U2) 140 Volts DC
Output Current Range 20-60 A
Duty Cycle at 1045 F (405 C) at rated
conditions (U
1
, I
1
, U
2
, I
2
) based on a 10 minute
period
Volts AC RMS − (U
1
) Duty Cycle %
208 Volts AC 1 Phase 40
230 Volts AC 1 Phase 50
General
Toppling or tilting Up to 15° incline
Gas Type Air/N2
Gas Quality Clean, moisture-free, oil-free
Gas Inlet Pressure and Flow 90 to 120 PSI at 6.75 SCFM (191 L/min)
Gas Filtering Particulates to 5 microns
B. Torch
Mild Steel Capacities See Section 6-8 for cutting speeds vs material type and thickness
Rated Capacity (edge start) 7/8 in.
Sever Cut Capacity (edge start) 1-1/4 in.
Pierce Capacity 7/16 in.
Gouge Capacity 10.0 lbs (4.5 kg) per hour

Miller Spectrum 875 Specifications

General

Amperage Output	20-60 A
CNC Interface	Optional
Gas Supply	Clean, dry, oil-free air or nitrogen
Input Frequency	50/60 Hz
Output Current Range	20-60 A
Welding Process	Plasma cutting
TIG Start	Not applicable
Rated Output	60 A
Cutting Capability	3/4 in (19 mm)
Cutting Capacity	1 in (25 mm)
Severance Capacity	1-1/4 in (32 mm)
Input Phase	1- or 3-Phase
Duty Cycle	60%