Miller Electric Big Blue 402D, Owner'S Manual, Page: 49 / 116

OM-495 Page 43
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8-2. Connecting To Optional Three-Phase Generator (CC/CV Standard Models Only)
Ref. 197 399 / 802 332-B
Place Process/Contactor switch
in Electrode Hot - Stick position
when using three-phase genera-
tor (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
three-phase 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 unused
cables.
Have qualified person install ac-
cording to circuit diagram and
Generator Power Guidelines
(see Section 14).
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 three-phase
generator output stops and the
receptacle does not work.
Reinstall generator 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
Close panel opening
if no connections are
made to generator.
Close panel
opening if no
connections
are made to
generator.
240V
Remove plug
before inserting
leads. Reinstall
bushing.