Miller Electric ProHeat 35 - Manual (Page 20)

OM-222 166 Page 14
Ref. 804 430-A
Tools Needed:
4-6. Connecting 3-Phase Input Power For 400/460 Volt Models
3/8 in
! Installation must meet all National and
Local Codes − have only qualified per-
sons make this installation.
! Disconnect and lockout/tagout input
power before connecting input con-
ductors from unit.
! Make input power connections to the
welding power source first.
! Always connect green or green/yellow
conductor to supply grounding termi-
nal first, and never to a line terminal.
.
The circuitry in this unit automatically
adapts the power source to the primary
voltage being applied. Check input
voltage available at site. This unit can be
connected to either 400 or 460 VAC input
power.
See rating label on unit and check input volt-
age available at site.
1 Input Power Conductors (Customer
Supplied Cord)
Select size and length of conductors using
Section 4-4. Conductors must comply with
national, state, and local electrical codes. If
applicable, use lugs of proper amperage
capacity and correct hole size.
Welding Power Source Input Power Con-
nections
2
Strain Relief
Route conductors (cord) through strain relief
and tighten screws.
3
Machine Grounding Terminal
4 Green Or Green/Yellow Grounding
Conductor
Connect green or green/yellow grounding
conductor to welding power source grounding
terminal first.
5
Welding Power Source Line Terminals
6 Input Conductors L1 (U), L2 (V) And L3
(W)
Connect input conductors L1 (U), L2 (V) and
L3 (W) to welding power source line terminals.
Close and secure access door on welding
power source.
Disconnect Device Input Power Connec-
tions
7 Disconnect Device (switch shown in
OFF position)
8 Disconnect Device (Supply) Grounding
Terminal
Connect green or green/yellow grounding
conductor to disconnect device grounding ter-
minal first.
9 Disconnect Device Line Terminals
Connect input conductors L1 (U), L2 (V) And
L3 (W) to disconnect device line terminals.
10 Over-Current Protection
Select type and size of over-current protection
using Section 4-4 (fused disconnect switch
shown).
Close and secure door on line disconnect de-
vice. Remove lockout/tagout device, and
place switch in the On position.
7
8
1
5
4 2 3
4
L1
L2
L3
6
9
10
= GND/PE Earth Ground
3
6