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Auto-Line™ Power Management Technology puts you in control of the primary power. Now, primary power management begins at the plug and ends in your wallet.
The Auto-Line circuit boosts primary power to a higher, constant voltage. Even if incoming voltage varies widely, the circuit ensures a rock-steady welding or cutting arc.
NOTE: The input voltage range may be different for each product. Refer to the product Spec Sheet for the specific input voltage range.
Rock steady arc even during fluctuations in primary power.
Permits direct connection to almost any type of input power—115-575 VAC (varies by product), 1- or 3-phase, 50 or 60 Hz.
Permits more welding machines without boosting incoming service.
Helps your welding machine pay for itself through lower utility bills and potential for rebates.
You get the max output for a given primary current draw. As a result, machines like the Maxstar 150 can produce 30% more welding power than competitive welders on 115 V primary.
Miller Plasma Cutter Feature - Auto-Line An Auto-Line™ unit automatically connects to any primary input voltage from 208 -- 575 volts single- or three-phase, 50 or 60 Hz.. 
November 8, 2010