Tweco 300 TS Arcmaster(Feb2006) - Manual (Page 19)

13
3.03 Electrical Input Connections
WARNING 4
ELECTRIC SHOCK can kill; SIGNIFICANT DC VOLTAGE is present after removal of input power.
SHUT DOWN welding power source, disconnect input power employing lockout/tagging
procedures. Lockout/tagging procedures consist of padlocking line disconnect switch in open
position, removing fuses from fuse box, or shutting OFF and red-tagging circuit breaker or other
disconnecting device.
3.03.01 Electrical Input Requirements
Operate the welding power source from a single/three-phase 50/60 Hz, AC power supply. The
input voltage must match one of the electrical input voltages shown on the input data label on
the unit nameplate. Contact the local electric utility for information about the type of electrical
service available, how proper connections should be made, and inspection required.
The line disconnect switch provides a safe and convenient means to completely remove all
electrical power from the welding power supply whenever necessary to inspect or service the
unit.
Note 2
This unit is equipped with a three-conductor with earth power cable that is connected at the
welding power source end for single and three phase electrical input power.
Do not connect an input (WHITE or BLACK or RED) conductor to the ground terminal.
Do not connect the ground (GREEN) conductor to an input line terminal.
Refer to Figure 3 and:
1. Connect end of ground (GREEN) conductor to a suitable ground. Use a grounding method that
complies with all applicable electrical codes.
2. Connect ends of line 1 (BLACK) and line 2 (WHITE) and line 3 (RED) input conductors to a
de-energized line disconnect switch.
3. Use Table 1 and Table 2 as a guide to select line fuses for the disconnect switch.
Note 3
For Single-Phase operation connect the GREEN, BLACK and WHITE input conductors. Insolate
the RED Conductor, it is not used for Single-phase operation.