SPW Product Catalogue 2019

SAFETY IN WELDING
Do Your Welding Machines Comply to
Australian Standards?
Many welding machines on the market – new and old – have open
circuit voltages between 40v and 113v in both A.C. and D.C. While
this level of voltage is required to strike an arc, it can be dangerous
in certain conditions and in recent years there has been a number of
welding deaths due to electrocution. Hazardous conditions such as
dampness, wet work area, caustic, salty, excessive heat, working at
height or in confined spaces all add to the dangers this voltage can
cause.
Recent changes to the Australian Standards for Welding Machines
have now seen the need to protect welders against the dangers of
high open circuit voltage on welding machines. This protection can
be offered through a switch operated by the welder or from a Voltage
Reduction Device (VRD) in the welding circuit.
Does this apply to you?
If you use a Stick welding machine (MMAW), then a Voltage Reduction
Device is required. When a VRD is fitted to a welding machine, it
reduces the maximum unloaded open circuit voltage across the
output terminals of the welder to a safe voltage of less than 35 Volts
D.C. or 25 Volts A.C. (typically 12 Volts).
How does the VRD work?
AUTOMATION
When a load of less than 200 ohms resistance is applied to the output
of the welding machine, such as striking the arc, the VRD will sense
this and turn the welder back to full output and allow an arc to be
established.
Similarly, when the resistance across the output rises above 200 ohms
or the electrode is removed from the workpiece, then the VRD will
turn the output of the welder back to a safe level. The resistance of
the human body is higher than 200 ohms, so in a dangerous situation
where the operator were to come in contact with the electrode, the
VRD will not turn to weld mode and a safe voltage as determined by
the Australian Standard 1674.2 2007 will be retained.
1
GPSS 4 / 6 PORTABLE VRD
Input 20 to 100 Volts AC/DC & reverse polarity DC Rated at 400/600 amps at 100% duty cycle.
Fitted with 1 Metre x 95mm2 input and output cables
Constructed from 304 Stainless steel sealed with rubber gaskets and Teflon LED seals.
“O” ring sealed chromed brass cable glands turn on resistance 20 to 150 Ohms/turn off less than 200 Ohms
turn on time 1.64MS/turn off time .3 seconds reduced output volts approximately 12 volts.
Warranty is 2 years RTB, NATA tested.
Can be permanently mounted using 8mm tamperproof bolts.
No effect on welding machines duty cycle or weld characteristics.
Height: 95mm x 220mm wide x 275mm long.
Total weight 10.5kgs
DM2 PORTABLE DEADMAN SWITCH
The DM2 Portable Deadman Switch is an emergency cut-off switch. The unit is connected
in series with the electrode lead; isolation is achieved by pressing down on large red button.
RM1 MAGNETIC REMOTE
Rated 400 amps 100% duty cycle, constructed from UV stabilized UHPE.
Fitted with 1 Metre input and output cables & 500 Amp mech-connectors.
Warranty is 1 year RTB.
Height: 155m x 100mm wide x 300mm long.
Fitted with 1 metre x 50mm carry strap.
Total weight 6kg.
Fully Sealed, Impact resistant Magnetic Remote, comes with 15 Meters rubber cable fitted
with potentiometer and Amphenol plug to suit machine, engraved dial label with your
company’s details
WELDING EQUIPMENT
1300 WELDER (1300 935 337)
203