Input Cable Installation And Connection; Ground Connection - Lincoln Electric INVERTEC STT Series Service Manual

A-4
INPUT CABLE INSTALLATION AND
CONNECTION
A cable strain relief is provided at the supple line entry
and is designed to accommodate cable diameters of
.310 - 1.070 in. (7.9 - 27.2 mm). Refer to Technical
Specifications at the beginning of this section for the
proper input cable sizes. Refer to Figure A.1 and per-
form the following steps:
1. Remove the wraparound cover of the Invertec STT.
2. Feed the input cable through the input cable entry
access hole at the right rear of the machine.
3. Route the cable through the cable hangers, locat-
ed along the lower right inside edge of the
machine, up to the power switch located on the
front panel.
4. Strip away 102 mm (4 in.) of the outer jacket. Trim
fillers and strip conductor jackets to connect to the
power switch.
5. Connect the three phase line con-
ductors to the power switch termi-
nals labeled U, V and W. Tighten
the connections to 3.0 Nm. (27 in.-lb.) torque.
6. Securely tighten the cable strain relief located on
the case back of the machine.
INSTALLATION
FIGURE A.1 - CASE BACK
INPUT CABLE
ENTRY ACCESS
& CABLE STRAIN RELIEF
INVERTEC STT
NAMEPLATE

GROUND CONNECTION

1. Connect the ground terminal to earth
ground per National Electrical Code.
2. Replace the wraparound cover of the Invertec STT.
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