Tweco 400 TS Arcmaster - Manual (Page 20)

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.