Tweco 300 S Arcmaster - Manual (Page 19)

ARCMASTER ® 300 S
March 31, 2006 3-1
SECTION 3:
INSTALLATION RECOMMENDATIONS
3.01 Environment
The ARCMASTER 300 S is designed for use in hazardous
environments.
Examples of environments with increased hazardous
environments are -
a. In locations in which freedom of movement is restricted,
so that the operator is forced to perform the work in a
cramped (kneeling, sitting or lying) position with physical
contact with conductive parts,
b. In locations which are fully or partially limited by
conductive elements, and in which there is a high risk
of unavoidable or accidental contact by the operator,
c. In wet or damp hot locations where humidity or
perspiration considerably reduces the skin resistance
of the human body and the insulation properties of
accessories.
Environments with hazardous environments do not include
places where electrically conductive parts in the near vi-
cinity of the operator, which can cause increased hazard,
have been insulated.
3.02 Location
Be sure to locate the welder according to the following
guidelines:
• In areas free from moisture and dust.
• Ambient temperature between 0 degrees C to 40
degrees C.
• In areas free from oil, steam and corrosive gases.
• In areas not subjected to abnormal vibration or shock.
• In areas not exposed to direct sunlight or rain.
• Place at a distance of 12” (304.79mm) or more from
walls or similar that could restrict natural airfl ow for
cooling.
!
WARNING
Thermal Arc advises that this equipment be
electrically connected by a qualifi ed electrician.
3.03 Electrical Input Connections
!
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. 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.
• 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
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.
Do not connect an input (BROWN or BLUE or RED) conductor
to the ground terminal.
Do not connect the ground (YELLOW/GREEN) conductor to an
input line terminal.
Refer to fi gure 3 and: