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MtS 3500i Power Source
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The MTS 3500i is a high performance constant voltage (CV) and constant current (CC) inverter power source designed
to provide multi-process welding capabilities with dependability and ease of use. The MTS 3500i is a self-contained
unit which will produce power for Gas Metal Arc (MIG), Gas Tungsten Arc (TIG) and Shielded Metal Arc (Stick) welding
without the use of optional apparatus.
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For MIG (CV) welding, the MTS 3500i supports welding a wide selection of ferrous and non-ferrous alloys by utilizing
Fixed Slope and inductance controls.
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A special "Touch Tig" circuit eliminates the need for high frequency or "scratch" starting when using the TIG (CC) weld-
ing process. This feature provides smooth starts without contaminating the electrode or the work.
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The Stick (CC) welding mode provides adequate open circuit voltage (70 V dc) for easy starts and re-starts as well as an
adjustable arc force which controls arc penetration and wetting action.
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The "Auto Fan" feature operates the cooling fan only when the contactor is energized or when the internal tempera-
ture exceeds the safe operating level. During normal operation, the fan shuts down about 5 minutes after the contac-
tor disengages.
Specifications: MTS 3500i
1 phase Input ................................................ 230 vac, 60 Hz, 44A
1 phase Output .............. 225 amps @ 29v - 100% duty cycle
3 phase Input ................................230/460 vac, 60 Hz, 39/24 A
................................................400/440 vac, 50/60 Hz, 24/27 A
...................................................................... 575 vac, 60 Hz, 17 A
3 phase Output .................350 amps @ 34v - 60% duty cycle
Voltage requirements ..................................... 208V, -5%, +15%
Note: The MTS 3500i may also operate from a 208 V pri-
mary input when 230 V input voltage is selected. However,
output is derated 10%.
......................................................230, 400, 460, 575V, +/- 15%
........................................................................440V, - 15%, + 10%
Open Circuit Voltage (max) ................................................73 vdc
Dimensions ...................................................W = 11.5" (292 mm)
........................................................................H = 16.4" (417 mm)
........................................................................D = 29.8" (757 mm)
Weight .....................................................................101 lbs. (39 kg)
Duty cycle: The duty cycle refers to the time as a percentage of a ten-minute period that you can weld at a certain load
without overloading. The duty cycle is valid for 40 degrees C.
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