Tweco 186 DC Inverter - Manual (Page 32)

INSTALLATION, OPERATION AND SETUP 3-2 Manual 0-5237
186 AC/DC INVERTER INSTALLATION/SETUP
WARNING
ELECTRIC SHOCK can kill; SIGNIFICANT DC VOLTAGE is present after removal of input power. DO NOT
TOUCH live electrical parts.
SHUT DOWN welding power source, disconnect input power employing lockout/tagging procedures. Lock-out/
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.
Power Cords Included With Power Supply
Attached to the power supply is an input power cord with a 208/230Volt 50 Amp NEMA 6-50 P for plug.
WARNING
An electrical shock or fire hazard is probable if the following electrical service guide recommendations
are not followed. These recommendations are for a dedicated branch circuit sized for the rated output
and duty cycle of the welding Power Source.
50 / 60 Hz Single
Phase Supply
Supply Voltage 208/230V AC
Input Current at Maximum Output 32 Amps
Maximum Recommended Fuse* or Circuit Breaker Rating
* Time Delay Fuse, UL class RK5. Refer to UL248
50 Amps
50 Amps
Maximum Recommended Fuse^ or Circuit Breaker Rating
^Normal Operating , UL class K5. Refer to UL248
Minimum Recommended Cord Size
12 AWG
Maximum Recommended Extension Cord Length 50 ft
Minimum Recommended Grounding Conductor Size 12 AWG
Table 3-1: Electrical Service Guide
3.05 High Frequency Introduction
The importance of correct installation of high frequency welding equipment cannot be overemphasized. Interference
due to high frequency initiated or stabilized arc is almost invariably traced to improper installation. The following
information is intended as a guide for personnel installing high frequency welding machines.
!
WARNING EXPLOSIVES
The high frequency section of this machine has an output similar to a radio transmitter. The machine
should NOT be used in the vicinity of blasting operations due to the danger of premature firing
!
WARNING COMPUTER
It is also possible that operation close to computer installations may cause computer malfunction.