Miller Electric OM-4409 - Manual (Page 41)

OM-4409 Page 37
7-2. Connecting To Optional AC Power Plant
Ref. 197 399 / 802 332-B
.
Do not weld while using optional ac
power plant.
.
Place Process/Contactor switch in
Weld Terminals Always On - Stick
position when using optional ac
power plant (see Section 6-3).
Single-Phase Generator Power
1
120/240 V 50 A Receptacle RC5
RC5 is connected to the optional ac
power plant 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 protects
single-phase receptacle RC5 and the
load wires from overload. If CB7
opens, all generator ac output stops
and the receptacle does not work.
Three-Phase Generator Power
! Stop engine.
! Power and weld outputs are live
at the same time. Disconnect or
insulate unused cables.
.
Have qualified person install ac-
cording to circuit diagram and
Generator Power Guidelines (see
Section 16).
Remove 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 applicable
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 termi-
nals on CB7 and to the isolated neutral
terminal and grounding terminal as
necessary.
.
Supplementary protector CB7 pro-
tects single-phase receptacle RC5
and the load wires from overload.
If CB7 opens, all ac power plant
output stops and the receptacle
does not work.
Reinstall 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 power plant.
! Close panel
opening if no
connections
are made to
power plant.
240V
Remove plug
before inserting
leads. Reinstall
bushing.