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SECTION 3
3.1 GENERAL
Proper installation can contribute materially to the satis-
factory and trouble-free operation of the Precision Plasmarc
System. It is suggested that each step in this section be
studied and carefully followed.
3.2 EQUIPMENT REQUIRED
A. Gas Supply and Hoses. Gas supply may be from a
bulk source or from a bank of manifold cylinders and
regulated to supply 125 psig (8.6 bar) to the Flow
Control (gas flowing).
B. Work Lead. No. 4 AWG cable is recommended for
connecting workpiece to power source.
C. Primary Input Cable. See Section 3.4.
3.3 LOCATION
Adequate ventilation is necessary to provide proper cool-
ing of the power source. Minimize the amount of dirt, dust,
and excessive heat to which the equipment is exposed.
There should be at least two feet of clearance between the
power source and wall or any other obstruction to allow
freedom of air movement through the power source.
Installing or placing any type of filtering device will restrict
the volume of intake air, thereby subjecting the power
source internal components to overheating. Use of any
type of filter device voids the warranty.
3.4 PRIMARY ELECTRICAL INPUT
CONNECTIONS (Figure 3-1)
WARNING
!
ELECTRIC SHOCK CAN KILL! Precautionary mea-
sures should be taken to provide maximum protec-
tion against electrical shock. Be sure that all power is
off by opening the line (wall) disconnect switch and
by unplugging the power cord to the unit before any
connections are made inside of the power source.
CAUTION
!
Be sure that the power source is properly configured
for your input power supply. Do NOT connect a power
source configured for 230 V to a 460 V input power
supply. Damage to the machine may occur.
As shipped, the power source is configured for 575 V, 60
Hz input. If using 200, 230, 380, 415, or 460 V input, the
jumper input power cables located on the auto trans-
former must be repositioned to the desired input voltage
for safe operation. To gain access to the autotransformer,
remove the right side panel. (See Figure 3-1.)
A line (wall) disconnect switch with fuses or circuit break-
ers should be provided at the main power panel (see Table
3-1 for fuse rating). The input power cable of the power
source may be connected directly to the disconnect
switch or a proper plug and receptacle may be purchased
from a local electrical supplier. If using plug/receptacle
combination, see Table 3-1 for recommended input con-
ductors for connecting receptacle to line disconnect switch.
Table 3-1 Recommended Sizes For
Input Conductors and Lline Fuses
Input Requirements
Volts
Phase
Amps CU/AWG
200
3
70
230
3
60
380
3
50
415
3
40
460
3
30
575
3
25
*Sizes per National Electric Code for 75°C rated conductors @ 30°Cambient. Not
more than three conductors in raceway or cable. Follow local codes if they specify
sizes other than those listed above.
The following procedure explains the proper installation
steps for connecting primary electrical power to the power
source. (See Figure 3-1.)
A. Remove right side panel.
B. Ensure input power cable is disconnected from all
electrical sources.
C. Route input power cable through the strain relief
located at the rear panel.
23
INSTALLATION
Input & Gnd
Fuse Ratings/
Conductor
Phase, Amps
2
mm
No. 4
25
100
No. 6
16
80
No. 8
10
80
No. 10
6
60
No. 10
6
50
No. 10
6
40
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