Miller Electric Big 40 WG - Manuel (Page 35)

OM-4405 Page 31
7-2. Connecting To Optional Auxiliary Power Plant (CC/CV Models Only)
Ref. 197 399 / 802 332-E
.
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 unused
cables.
.
Have qualified person install ac-
cording to circuit diagram and
Auxiliary Power Guidelines (see
Section 10).
Remove auxiliary 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 auxiliary power
plant output stops and the recep-
tacle does not work.
Reinstall auxiliary power panel.
Tools Needed:
Volts
Amps
KVA/KW
Single
120/240
50
12
Three
240
48
20
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 power plant.
Y Close panel
opening if no
connections
are made to
power plant.
240V
Remove plug
before inserting
leads. Reinstall
bushing.