Manual 0-5186 3-7
Safety and Installation
SAFETY AND INSTALLATION WELDSKILL 250, 350
3.09 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. 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.
• Electrical Input Requirements
Operate the welding power source from a single-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.
Do not connect an input (WHITE or BLACK) conductor
to the ground terminal.
Do not connect the ground (GREEN) conductor to an
input line terminal.
1. Connection end of ground (GREEN or GREEN/
YELLOW) conductor to a suitable ground. Use
a grounding method that complies with all
applicable electrical codes.
2. Connect ends of active (BROWN) and Neutral
(BLUE) input conductors to a suitable power
supply system that complies with all appliance
local electrical codes.
Input Power
Each unit incorporates an INRUSH circuit. When the
MAIN CIRCUIT SWITCH is turned on, the inrush circuit
provides pre-charging for the input capacitors. A relay
in the Main Power PCB1 will turn on after the input
capacitors have charged to operating voltage (after
approximately 5 seconds).
3.10 Electromagnetic Compatibility
WARNING
Extra precautions for Electromagnetic
Compatibility may be required when this
Welding Power Source is used in a domestic
situation.
3.11 Installation and Users
Responsibility
The user is responsible for installing and using the
welding equipment according to the manufacturer’s
instructions. If electromagnetic disturbances are
detected then it shall be the responsibility of the user
of the welding equipment to resolve the situation with
the technical assistance of the manufacturer. In some
cases this remedial action may be as simple as earthing
the welding circuit, see NOTE below. In other cases it
could involve constructing an electromagnetic screen
enclosing the Welding Power Source and the work,
complete with associated input filters. In all cases,
electromagnetic disturbances shall be reduced to the
point where they are no longer Trouble-some.
NOTE
The welding circuit may or may not be
earthed for safety reasons. Changing the
earthing arrangements should only be
authorised by a person who is competent to
assess whether the changes will increase the
risk of injury, e.g. by allowing parallel welding
current return paths which may damage the
earth circuits of other equipment. Further
guidance is given in IEC 974-13 Arc Welding
Equipment - Installation and use (under
preparation).
To Next Page
Loading...
