Connecting To Optional Auxiliary Power Plant (Cc/Cv Models Only) - Miller Electric Big 40 WG Owner's Manual

7-2. Connecting To Optional Auxiliary Power Plant (CC/CV Models Only)

Single-Phase Power Connection
Three-Phase Power Connection
Remove plug
before inserting
leads. Reinstall
bushing.
5
6
7
9
8
1 2
Y Close panel opening
if no connections are
made to power plant.
Engine Speed
Lead 42 connects to GROUND stud on
front of unit.
Jumper 42 is connected to 90 at factory.
Rear Of Panel
91 92 93
240V
120V
1-Phase
120V
240V
3-Phase
240V
240V
Single Three
AC
Phase Phase
Output
1 3
Volts 120/240 240
Amps 50 48
KVA/KW 12 20
Frequency 60 Hz
1850 RPM
4
3
2
12
10
11
Y Close
panel
opening if no
connections
are made to
power plant.
Tools Needed:
.
Place Process/Contactor switch
in Electrode Hot - Stick position
when using auxiliary power plant
(see Section 6-3).
Single-Phase Auxiliary Power
1 120/240 V 50 A Receptacle
RC5
RC5 is connected to the optional
auxiliary power plant and supplies 60
Hz single-phase power at weld/pow-
er 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
auxiliary power plant output stops
and the receptacle does not work.
Three-Phase Auxiliary Power
Y Stop engine.
Y Power and weld outputs are
live at the same time. Discon-
nect or insulate
cables.
.
Have qualified person install ac-
cording to circuit diagram and
Auxiliary Power Guidelines (see
Section 10).
Remove auxiliary power
mounting screws. Tilt panel forward.
93
3 Lead 93
4 Lead 92
91
5 Lead 91
90
6 Lead 42 (Circuit Grounding
Lead)
92
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 auxiliary power
plant output stops and the recep-
tacle does not work.
Reinstall auxiliary power panel.
Ref. 197 399 / 802 332-E
OM-4405 Page 31
unused
panel