9-8. Engine/Generator Overload Protection

 

 

 

!

Stop engine.

 

 

 

. When a supplementary protector,

 

 

 

 

circuit breaker or fuse opens, it

 

 

 

 

usually indicates a more serious

 

 

 

 

problem exists. Contact Factory

 

 

 

 

Authorized Service Agent.

 

 

 

. See Section 10-4for air compres-

 

 

 

 

sor overload protection.

 

 

 

1

Fuse F1

 

 

 

2

Fuse F2

 

 

 

F1 and F2 protect the stator exciter

 

 

 

winding from overload. If F1 opens,

 

 

 

weld and generator power is low or

 

 

 

stops entirely. If F2 opens, weld output

 

 

 

is low or stops entirely. 4 kVA/kW gen-

 

 

 

erator power is still available.

 

 

 

3 Circuit Breaker CB4 (Not Shown)

 

 

 

4

Supplementary Protector CB5

 

 

 

5

Supplementary Protector CB6

 

 

 

6 Circuit Breaker CB10 (Not

 

 

 

 

Shown)

 

 

 

7

Supplementary Protector CB11

 

 

 

8

Supplementary Protector CB12

 

2

1

9

Supplementary Protector CB13

 

10

Circuit Breaker CB14

 

 

 

 

 

 

 

(Not Shown)

 

 

 

CB4 protects the welding arc drive (dig)

 

 

 

circuit. If CB4 opens, electrode may

 

 

 

stick to the workpiece more frequently

 

 

 

during low voltage (short arc length)

 

 

 

conditions. CB4 automatically resets

 

9

 

when the fault is corrected.

 

8

 

CB5 protects the 24 volt ac output to re-

 

7

 

mote receptacle RC14, and 24 volt out-

4

5

 

put to field current regulator board PC1.

 

If CB5 opens, weld output and 24 volt

 

 

 

 

 

 

output to RC14 stops. On units with op-

 

 

 

tional power plant, power at receptacle

 

 

 

RC5 also stops if CB5 opens.

 

 

 

CB6 protects the 115 volt ac output to

 

 

 

remote receptacle RC14. If CB6 opens,

 

 

 

115 volt output to RC14 stops.

 

 

 

CB10 protects the engine battery cir-

 

 

 

cuit. If CB10 opens, the engine will not

 

 

 

crank. CB10 automatically resets when

 

 

 

the fault is corrected.

 

 

 

CB11 protects the engine wiring har-

 

 

 

ness. If CB11 opens, weld output stops

 

 

 

(generator power is still available).

 

 

 

CB12 protects the field flashing circuit.

 

 

 

If CB12 opens, the generator may not

 

 

 

excite at start-up and weld and genera-

 

 

 

tor power output may not be available.

 

 

 

CB13 protects the engine shutdown cir-

 

 

 

cuit. If CB13 opens, the engine cranks

 

 

 

but does not start.

 

 

 

Press button to reset.

 

 

 

CB14 protects the throttle solenoid. If

 

 

 

CB14 opens, the engine will not run at

 

 

 

idle speed. CB14 automatically resets

 

 

 

when the fault is corrected.

803 229

OM-4409 Page 50

Page 53 Page 55
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Miller Electric OM-4409 manual Engine/Generator Overload Protection
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OM-4409 specifications

The Miller Electric OM-4409 is a remarkable welding machine designed for both professional welders and enthusiastic hobbyists. Known for its reliability and efficiency, the OM-4409 stands out in the industrial landscape due to its advanced features and innovative technologies.

One of the main features of the OM-4409 is its impressive power output. With a rated output of 400 amps, it is capable of tackling a variety of welding applications, including MIG, TIG, and stick welding. This versatility allows users to switch between welding processes depending on the project requirements while ensuring consistent quality and performance.

The machine incorporates advanced inverter technology, which enhances its overall efficiency. Inverter technology allows for a compact design without sacrificing performance. The OM-4409 weighs significantly less than traditional transformer-based machines, making it more portable and easier to transport. Additionally, the inverter technology ensures that energy consumption is kept to a minimum, reducing operational costs.

Another notable characteristic of the Miller Electric OM-4409 is its user-friendly interface. The intuitive control panel provides easy access to settings and adjustments, allowing welders to fine-tune the machine to their specific needs. The digital display shows crucial parameters such as voltage, amperage, and wire feed speed, enabling welders to monitor their progress in real-time effectively.

Safety is paramount in industrial applications, and the OM-4409 does not disappoint. It is equipped with advanced safety features, including thermal overload protection and fault indication systems. These features ensure that the machine operates within safe limits, protecting both the user and the equipment.

The OM-4409 also boasts a robust build quality, designed to withstand the rigors of daily use in demanding environments. Its durable construction ensures longevity, minimizing maintenance and downtime.

In summary, the Miller Electric OM-4409 welding machine is a powerhouse that combines power, efficiency, and user-friendliness. With its inverter technology, versatility across various welding processes, advanced safety features, and robust design, it represents an excellent investment for any welding professional looking to enhance their capabilities. Whether for heavy-duty industrial applications or intricate metalwork, the OM-4409 delivers unmatched performance and reliability.
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