7-3. Connecting Optional AC Power Plant

14

13

12

11

10

93

91

90

92

15

1

F3

2

F2

3

F1

4

5

9

8

7

6

 

 

 

AC

 

 

Single

 

Three

 

 

 

 

 

 

 

Phase

 

Phase

 

Output

 

 

 

 

 

 

 

1

 

3

 

Volts

 

 

120/240

 

240

 

Amps

 

 

31

 

24

 

 

 

 

 

 

 

 

KVA/KW

 

 

7.5

 

10

 

Frequency

 

 

 

60 Hz

 

 

 

 

 

 

Engine Speed

 

 

1850 RPM

 

Max. Fuse Size

 

 

35 Amperes

Lead 42 connects to GROUND stud on front of unit.

Jumper 42 is connected to 90 at factory.

YStop engine.

YPower and weld outputs are live at the same time. Disconnect or insulate unused cables.

.Have qualified person install

according to circuit diagram and Generator Power Guide- lines (Section 11).

Remove junction box cover.

1Lead 93

2Lead 92

3Lead 91

4Lead 90 (Neutral)

5Lead 42 (Circuit Grounding Lead)

Lead 42 connects to front panel Ground stud.

6Grounding Terminal

7Jumper Lead 42

8Isolated Neutral Terminal

Jumper 42 is connected to lead 90 at factory. Jumper 42 may be dis- connected from neutral to meet applicable electrical codes.

9Lead 80

10Receptacle RC9 leads

11Lead 42

12Lead 81

13Lead 82

14Load Terminals Connect leads to terminals.

15Fuses F1, F2, And F3

F1, F2, and F3 protect each load line from overload.

.Set Engine Control switch to

Run when using generator power.

Tools Needed:

Ref. S-179 637-B

OM-480 Page 22

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Image 26
Miller Electric Big Blue 251D manual Connecting Optional AC Power Plant, Tools Needed