Connecting To Optional Three-Phase Generator (Cc/Cv Models Only) - Miller Big 40 C Owner's Manual

8-2. Connecting To Optional Three-Phase Generator (CC/CV Models Only)

Single-Phase Power Connection
Three-Phase Power Connection
Remove plug
before inserting
leads. Reinstall
bushing.
5
6
7
9
8
OM-4427 Page 42
1 2
!
Close panel opening
if no connections are
made to generator.
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 36
KVA/KW 12 15
Frequency 60 Hz
1850 RPM
4
3
2
12
10
11
!
Close panel
opening if no
connections
are made to
generator.
Tools Needed:
.
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 Supplementary Protector CB7
Supplementary Protector CB7 pro-
tects single-phase receptacle RC5
and the load wires from overload. If
CB7 opens, all generator output
stops and the receptacle does not
work.
Three-Phase Generator Power
!
Stop engine.
!
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
Generator Power Guidelines
(see Section 12).
93
Remove generator power panel
mounting screws. Tilt panel forward.
91
3 Lead 93
4 Lead 92
90
5 Lead 91
92 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 Supplementary Protector CB7
User Terminals
Connect user-supplied leads to ter-
minals on CB7 and to the isolated
neutral terminal and grounding termi-
nal as necessary.
.
Supplementary protector CB7
protects single-phase receptacle
RC5 and the load wires from
overload. If CB7 opens, all gener-
ator output stops and the recep-
tacle does not work.
Reinstall generator power panel.
Ref. 197 399 / 802 332-E / 803 655
unused