ESAB EPP-200 Instruction Manual page 92

SECTION 3
3.4.2 Primary Power Hookup Procedure
Input Power Cable
Strain Relief
Ground
Connection
Main
Contactor
7 Position
Terminal
Block
Auto
Transformer
Factory wired
for 575 volts
CAUTION
The following procedure explains the proper installation steps for
connecting primary electrical power to the plasma console.
NOTE: Safety codes specify the power ground wire be the last
connection to break should the cable be pulled out of the unit.
When preparing the cable for connection, make the ground wire
6 inches (152mm) longer than the three pr primary wires.
1. Ensure input power cable is disconnected from all electrical
sources.
2. Remove right side panel (as viewed from front of console).
3. Route input power cable through the strain relief located at the rear
panel.
4. Pull input power cable through the strain relief to allow cable wires
suffi cient length to connect to main contactor. Tighten strain relief to
ensure input power cable is secured.
5. Connect input power cable ground wire to the ground lug provided
above TB2 (7 position terminal block).
6. Connect three power leads of input power cable to terminals located
atop the main contactor. Secure the leads by tightening each screw.
7. Connect jumper power cables from bottom of the main contactor
to proper input voltage marked on auto transformer. Unit is factory set
for 575V as shown at the left.
8. Connect jumper on TB2 to proper input voltage. This 7 position
terminal block jumper is factory set to 575V.
Input Power Jumper Connection
Ensure each input power jumper cable is connected to correct input
voltage on autotransformer and on TB2.
Factory wired for 575 Volts
92
INSTALLATION