ESAB Cutmaster 120 Operating Manual page 18

ESAB CUTMASTER 120
A. Connections to Single Phase Input Power
WARNING
Disconnect input power from the power
supply and input cable before attempting
this procedure.
These instructions are for changing the input power and or cable
on the 208/230, 400, 460 VAC Power Supply to Single - Phase
input power.
1. Remove the Power Supply cover per instructions found in
section 5.
2. Disconnect the original input power cable from the main
input contactor and the chassis ground connection.
3. Loosen the through - hole protector on the back panel of
the power supply. Pull the original power cable out of the
power supply.
4. If the power cable being used is not the factory - sup-
plied cable, use a three - conductor input power cable for
the voltage desired and strip back the insulation on the
individual wires.
5. Pass the cable being used through the access opening in
the back panel of the power supply. Refer to Section 2 for
power cable specifications.
CAUTION
!
The primary power source and power cable
must conform to local electrical code and
the recommended circuit protection and
wiring requirements (refer to table in Sec-
tion 2).
6. Connect the wires as follows.
• Connect Bus Bar Jumpers on the contactor as shown
in prior illustration and on label in the power supply.
• Green / Yellow wire to Ground.
7. Reinstall the Power Supply cover per instructions found in
section 5.
8. Connect the opposite end of individual wires to a customer
supplied plug or main disconnect.
9. Connect the input power cable (or close the main discon-
nect switch) to supply power.
3-2
B. Connections to Three Phase Input Power
WARNING
Disconnect input power from the power
supply and input cable before attempting
this procedure.
These instructions are for changing the input power and or cable
on the 208/230, 400, 460 VAC Power Supply to Three - Phase
input power.
1. Remove the Power Supply cover per instructions found in
section 5.
2. Disconnect the original input power cable from the main
input contactor and the chassis ground connection.
3. Loosen the through - hole protector on the back panel of
the power supply. Pull the original power cable out of the
power supply.
4. Using a customer supplied four - conductor input power
cable for the voltage desired, strip back the insulation on
the individual wires.
5. Pass the cable being used through the access opening in
the back panel of the power supply. Refer to Section 2 for
power cable specifications.
CAUTION
!
The primary power source and power cable
must conform to local electrical code and
the recommended circuit protection and
wiring requirements (refer to table in Sec-
tion 2).
6. Connect the wires as follows.
• Wires to L1, L2 and L3 input. It does not matter what
order these wires are attached. See previous illustra-
tion and on label in the power supply.
• Green / Yellow wire to Ground.
7. With a little slack in the wires, tighten the through - hole
protector to secure the power cable.
8. Reinstall the Power Supply cover per instructions found in
section 5.
9. Connect the opposite end of individual wires to a customer
supplied plug or main disconnect.
10. Connect the input power cable (or close the main discon-
nect switch) to supply power.
INSTALLATION Manual 0-5380