Miller Electric CST 250 VRD manual Installation, Specifications, Duty Cycle And Overheating

SECTION 3 − INSTALLATION

3-1. Specifications

Welding

Input

Rated

Welding

Maximum

Amperes Input At Rated Load

Net

Mode

Power

Output

Amperage

Open-Circuit

Output, 50/60 Hz

KVA

KW

Dimensions

Range

Voltage

Weight

220

400

440

250 A @

30 VDC,

32.1

18.2

16.4

12.3

8.7

50 % Duty

3-Phase

Cycle

5-250 A

30 VDC

200 A @

28 VDC,

24.2

14.4

12.6

9.9

6.5

H: 13-1/2 in

100 %

(343 mm)

Stick

Duty Cycle

40 lb

W: 7-1/2 in

(SMAW)

(191 mm)

(18.2 kg)

200 A @

28 VDC,

42.6

n/a

n/a

10.0

6.6

D: 18 in (457

50 % Duty

mm)

1-Phase

Cycle

5-200 A

30 VDC

150 A @

26 VDC,

33.6

n/a

n/a

7.4

5.7

100 %

Duty Cycle

3-2. Duty Cycle And Overheating

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

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

Y Exceeding duty cycle can damage unit and void warranty.

206 173

200 A @ 50% Duty Cycle For Single Phase Operation 250 A @ 50% Duty Cycle For 3 Phase Operation

5 Minutes Welding	5 Minutes Resting	5 Minutes Welding	5 Minutes Resting
Overheating
	0	A or V
		15
		OR
	Minutes	Reduce Duty Cycle

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