.A complete Parts List is available at www.MillerWelds.com

SECTION 3 − INSTALLATION

3-1. Specifications

 

 

 

Max. Open

 

 

 

 

Amps Input at Rated Output

 

 

 

Rated Output

Circuit

 

60 Hz

 

 

 

 

 

 

 

 

 

 

 

 

Voltage

 

 

200 V

230 V

 

460 V

575V

 

KVA

KW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

300 A at

350 A at

90

 

Single-Phase

69

 

61

 

30

24

13.1

11.2

32 VDC,

32 VDC,

 

 

(1.7*)

(1.5*)

 

(0.75*)

(0.5*)

 

 

 

 

 

 

 

 

 

 

60% Duty

40% Duty

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

34

 

30

 

15

12

11.6

11.5

Cycle

Cycle

 

 

Three-Phase

 

 

 

 

(1.7*)

(1.5*)

 

(0.75*)

(0.5*)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* While idling

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Wire Type and Diameter

 

Wire Feed Speed

 

Dimensions

 

Net Weight

 

 

 

 

 

 

 

 

 

 

Solid Steel

 

Stainless Steel

Aluminum

 

50−700 IPM

H: 34 in. (864 mm)

 

181 lb

 

 

 

 

 

 

 

 

(1.3−17.8 m/min)

W: 19 in. (483 mm)

 

(82 kg)

 

.023 − .045 in.

 

.030 − .045 in.

.035 − .047 in.

 

 

 

 

 

 

D: 41 in. (1041 mm)

 

 

 

(0.8 − 1.1 mm)

 

(0.8 − 1.1 mm)

(0.9 − 1.2 mm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operating Temperature Range: −20C to +40C

 

 

 

Storage Temperature Range: -30C to + 50C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3-2. Duty Cycle And Overheating

WELDING AMPERES

500

400

300

250

225

200

150

10010

15

20

25

30

40

50

60

70 80 90 100

% DUTY CYCLE

Duty Cycle is percentage of 10 minutes that unit can weld at rated load without overheating.

If unit overheats, thermistors open, output stops, and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or voltage, or duty cycle before welding.

NOTICE − Exceeding duty cycle can damage unit and void warranty.

60% Duty Cycle At 300 Amperes

40% Duty Cycle At 350 Amperes

6 Minutes Welding

4 Minutes Resting

4 Minutes Welding

6 Minutes Resting

Overheating

0

A or V

 

15

OR

Reduce Duty Cycle

Minutes

sduty1 5/95 / 217 442-A

OM-1327 Page 11

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Miller Electric 350P manual Specifications, Duty Cycle And Overheating
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350P specifications

The Miller Electric 350P is a highly regarded power source in the world of welding, known for its impressive performance and versatility. This machine is part of the Miller family's long-standing tradition of providing reliable and efficient welding solutions for various applications including construction, manufacturing, and maintenance.

One of the main features of the Miller 350P is its ability to perform both MIG and Pulsed MIG welding. This dual capability allows operators to choose the most suitable welding process for their specific requirements. The machine is equipped with a robust inverter technology, which greatly enhances its efficiency and reduces energy consumption. The inverter design allows for a portable and lightweight unit, making it easier for welders to transport and set up in different working environments.

The 350P showcases an intuitive interface, featuring a digital display that provides real-time information on parameters such as voltage, current, and wire feed speed. This advanced interface is user-friendly, allowing operators to make quick adjustments on the fly, ultimately improving productivity and weld quality. The machine also supports a wide range of materials, including steel, stainless steel, and aluminum, making it a versatile tool for various projects.

Another key characteristic of the Miller 350P is its advanced arc control technology. This includes features such as Auto-Set and Adaptive Hot Start, which automatically adjust the welding parameters based on the material thickness and type. This technology not only simplifies the process for the operator but also enhances the overall quality of the welds, reducing the risks of defects and ensuring consistent results.

Additionally, the Miller 350P is designed with durability in mind. The machine is housed in a rugged case that protects it from challenging environments, allowing it to withstand the rigors of everyday use. Its cooling system ensures that it operates at optimal temperatures, preventing overheating during extended welding sessions.

In summary, the Miller Electric 350P is a powerful and versatile welding machine designed to meet the demands of today’s welding professionals. With its advanced technologies, user-friendly interface, and durable construction, it stands out as a top choice for those seeking efficiency and reliability in their welding processes. Whether for industrial applications or personal projects, the 350P offers a robust solution that supports a wide variety of welding needs.
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