Tweco 6045 Excel Arc - Manual (Page 24)

EXCEL ARC 6045 INSTALLATION
Manual 0-5213 3-4 August 26, 2011
3.05 Replacing the Input Power Cable
The input power should be connected to the unit through a fused disconnect switch, or other suitable disconnecting
means furnished by the user. A hole is provided in the rear panel of the machine, near to the input connections, for the
entry of the input conductors. Refer to "Figure 3-1: Electrical Input Connections".
!
WARNING
ELECTRIC SHOCK CAN KILL. Open the disconnect switch, or breaker, and determine that no voltage is
present, before connecting wires between welding machine and power supply.
CAUTION
The method of installation, conductor size, and overcurrent protection shall conform to the requirements of
the local electrical code, the National Electrical Code, or other national codes, as applicable. All installation
wiring and machine re-connections shall be done by qualifi ed persons.
Mains Supply Lead Size
Minimum Mains Current
Circuit size
Mains Supply Voltage
Weld Current & Duty
Cycle
8 AWG 40A 460V 3 phase 600A@60%
Table 3-4: Mains Current Circuit Sizes
1. Open the disconnect switch, or breaker, and determine that no voltage is present, before disconnecting wires be-
tween the Excel Arc ® 6045 and the power supply.
2. Remove the left-side cover of the Excel Arc ® 6045.
3. Loosen the compression clamp nut on the rear panel where the existing power cable enters the unit. Refer to "Figure
3-5: Power Cable Compression Nut".
4. Disconnect the three-phase line leads from terminals L1, L2, and L3 on the line contactor inside the welding machine
cabinet. Disconnect the ground wire from the ground terminal. Refer to "Figure 3-6: Input Power Cable Connection".
5. Remove the old power cable from the Excel Arc ® 6045 and route the new cable in through the same access hole.
6. Connect the three-phase line leads to terminals L1, L2, and L3 on the line contactor inside the welding machine
cabinet. Connect the ground wire to the ground terminal. Refer to "Figure 3-6: Input Power Cable Connection".
7. Tighten the compression nut on the rear panel where the new power cable enters the unit. Refer to "Figure 3-5:
Power Cable Compression Nut".
8. Replace the left-side cover of the Excel Arc ® 6045.
9. Close the disconnect switch, or breaker, and reapply power to the Excel Arc ® 6045 and the power supply.
Compression
Nut
Art# A-10902
Figure 3-5: Power Cable Compression Nut