Miller STi 270, Owner'S Manual

Page: 17 / 44

OM-263 706 Page 13
input2 2012−05
!
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. Follow established
procedures regarding the installation
and removal of lockout/tagout
devices.
!
Always connect green or green/yellow
conductor to supply grounding termi-
nal first, and never to a line terminal.
See rating label on unit and check input volt-
age available at site.
For Three-Phase Operation
1 Input Power Cord.
2 Disconnect Device (switch shown in the
OFF position)
3 Green Or Green/Yellow Grounding
Conductor
4 Disconnect Device Grounding Terminal
5 Input Conductors (L1, L2 And L3)
6 Disconnect Device Line Terminals
Connect green or green/yellow grounding
conductor to disconnect device grounding ter-
minal first.
Connect input conductors L1, L2, and L3 to
disconnect device line terminals.
7 Over-Current Protection
Select type and size of over-current protec-
tion using Section 4-6 (fused disconnect
switch shown).
Close and secure door on disconnect device.
Follow established lockout/tagout procedures
to put unit in service.
4-7. Connecting 3-Phase Input Power (Continued)
4-8. Connecting To 3-Phase Engine Generator w/400 Volt Output
Installation must meet all National and Local Codes − have only qualified persons make this installation.
.
Obtain a 400 volt plug that matches the receptacle on the engine generator. Install the plug on the cord of the welding power source according
to the plug manufacturer’s instructions.
Generator Requirements
•
Engine generator must provide the correct input amperage (see Section 4-6).
•
Frequency must be between 50 and 60 Hz
NOTICE − Make sure welding power source is off during engine generator start-up. Do not turn on the welding power source until the generator has
reached normal operating speed.
Notes