Miller Electric Big 40 CX User Manual
Page 39
OM-4427 Page 35
8-2. Connecting To Optional Three-Phase Generator (CC/CV Models Only)
Ref. 197 399 / 802 332-E / 803 655
.
Place Process/Contactor switch
in Weld Terminals Always On -
Stick position when using three-
phase generator (see Section
7-3).
Single-Phase Generator Power
1
120/240 V 50 A Receptacle
RC5
RC5 is connected to the optional
three-phase generator and supplies
60 Hz single-phase power at weld/
power speed. Maximum output from
RC5 is 12 kVA/kW. Power available
at RC5 is reduced when welding.
2
Circuit Breaker CB7
Circuit breaker CB7 protects single-
phase receptacle RC5 and the load
wires from overload. If CB7 opens, all
generator output stops and the recep-
tacle does not work.
Three-Phase Generator Power
Y Stop engine.
Y Power and weld outputs are
live at the same time. Discon-
nect or insulate unused
cables.
.
Have qualified person install ac-
cording to circuit diagram and
Generator Power Guidelines
(see Section 12).
Remove generator power panel
mounting screws. Tilt panel forward.
3
Lead 93
4
Lead 92
5
Lead 91
6
Lead 42 (Circuit Grounding
Lead)
7
Lead 90 (Neutral)
8
Isolated Neutral Terminal
9
Jumper Lead 42
10 Grounding Terminal
Jumper 42 is connected to lead 90 at
factory. Jumper 42 may be discon-
nected from neutral to meet applica-
ble electrical codes.
Lead 42 connects to front panel
Ground stud.
11 User-Supplied Leads
12 Circuit Breaker CB7 User
Terminals
Connect user-supplied leads to ter-
minals on CB7 and to the isolated
neutral terminal and grounding termi-
nal as necessary.
.
Circuit breaker CB7 protects
single-phase receptacle RC5
and the load wires from overload.
If CB7 opens, all generator out-
put stops and the receptacle
does not work.
Reinstall generator power panel.
Tools Needed:
Volts
Amps
KVA/KW
Single
120/240
50
12
Three
240
36
15
60 Hz
Frequency
Engine Speed
1850 RPM
AC
Phase
1
Phase
3
Output
Lead 42 connects to GROUND stud on
front of unit.
Jumper 42 is connected to 90 at factory.
1
2
91
92
93
240V
120V
120V
240V
240V
1-Phase
3-Phase
3
4
5
6
7
8
9
10
11
12
Rear Of Panel
Three-Phase Power Connection
2
Single-Phase Power Connection
92
90
91
93
Y Close panel opening
if no connections are
made to generator.
Y Close panel
opening if no
connections
are made to
generator.
240V
Remove plug
before inserting
leads. Reinstall
bushing.