SanRex SANARG 300AP, Operator'S Manual

Page: 38 / 98

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3.05.03 Electrical Input Connections
DO NOT TOUCH live electrical parts.
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.
WARNING:
ELECTRIC SHOCK can kill; a SIGNIFICANT DC VOLTAGE is present after
removal of input power until the internal components have time to discharge.
A 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:
These units are 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. For Single-Phase operation connect the GREEN, BLACK and WHITE input
conductors. Insulate the RED conductor, it is not used for single-phase operation.
The welding power source will not operate properly if the BLACK or WHITE wire is
exchanged for the RED wire in single-phase operation.
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 3-1 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 the other lines as follows:
a. For three-phase input connections: Connect the ends of line 1 (BLACK) and line 2 (WHITE)
and line 3 (RED) input conductors to a de-energized line disconnect switch.