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zRID, the Zero-Volt VRD solution for Welding SafetyInfo ZRID - VRD (LVD)
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New welder
First compliant welding machine to meet Mine specifications.
Evolution 130 AMP Welding Machine.
Arc-force, Anti-stick, Hot-start, Lift-arc.
Available from Elite Industrial Equipment or ZRID.Pty.Ltd

News Flash!
zRid Pty. Ltd. is proud to announce:
A Revolutionary Shock Protection Device.
Calibration and maintenance free.
zRID is not a self-start device.

4 in 1
ZRID - Compatable device on all AC or DC welding machines.
Z- Zero volts (OCV)
R- Remote (wireless)
I- Isolation
D- Device (Deadman switch)

Hazard Reduction Device
Low Voltage Device (VRD) - 4 Volt (OCV)
0.3 second cut-out (as per Standard)
One device fits all DC or AC/DC Welders except for HF operation.
Available on customer requests.

Isolation or Reduction?
zRID presents the ultimate in Hazard-reducing devices for welding machines.
Eliminate OCV with zRID (0 Volts)
Reduce OCV with Low Voltage Device (VRD - 4 Volts)

Dead Man Switch
Having difficulty turning on and off your power tools?
Then zrid's new dead man switch is your solution.
Using a mechanical or wireless trigger that can be conveniently placed anywhere to switch on and off your power tools.
Now available for all types of magnetic drills.

New Line Product
Featuring a remote control on/off switch which can be used to control fans, water pumps, fume extractors, lights and power applications, etc.

zRID - LVD Product

Welding Safety?

Choose advanced HRD protection Standards

Isolation with

zRID Pty Ltd

Isolate the OCV hazard with *zRID (0-Volt OCV)

* Remote controlled Isolation and Deadman (Vigilance switching device)

The z.R.I.D is a tremendous advance on any other hand-piece switching device seen to date... since the (OCV) voltage is not merely reduced it is isolated (Welding Technical Institute Australia (WTIA), NSW, July 2003)
We have chosen the zRID as it gives us a higher level of safety and the people using the welders find it easier to use than VRD protected welders. (Aluminium Smelters (CALNZAS) April 2006)

With ZRID everything old is *new again

(*Standards Compliant)
ZRIDs' Hazard Reducing Devices (HRD) are manufacture to ISO 9001 Standards and comply with all current Welding and EMC Standards and independently NATA tested for compliance.

Don't compromise on Safety or Standards
your health and your safety
choose wisely

Visible and Invisible hazards

Would you perform one of these visible hazards;
  • If you were a mechanic would you change a fan belt while the engine was idling?
  • Would you change a grinder disc while it was still spinning?
Your answer would definitely be NO

Then why would you want to change an electrode with electricity (invisible hazard) present in the welding cable and electrode holder at all times?

Only the ZRID system can de-energise the welding output when not welding.

Exposed Wires

When a power cord has exposed wires this is treated as a hazard and is unacceptable in the work place. The power cord is protected by RCD/ELCB, fuses and Circuit Breakers to prevent electrocutions from occurring.
Exposed welding wires (electrode and earth clamps) on a welding machine is not protected (norm for over 100 years). The only protection for welders is thick, heavy clothing that become damps, which then lowers the insulation capabilities of the clothing and can cause electrocutions to the welder.

Hierarchy of risk

Stated in the Code Of Practise; Control the risks, there is a 'hierarchy of risk control', which states that the 1st step is to "eliminate the risk" and if this cannot be done in a practical manner then the next step is to "minimise the risk".

Ohms Law

According to Ohms Law, fundamental electrical calculation, the reduced voltages (12-30 V) present at the output terminals and the resistance of less than 200 Ohms required by VRD devices to activate full OCV are enough to electrocute the welder. Using these figures in Ohms Law it will become clear what currents can flow through a person and why it is not a certified safety device.

I = V/R = 12 V / 200 Ohms = 60mA (This is 2x to 6x more than RCDs and never fully switch OFF the welding output in 0.3s)

I = V/R = 30 V / 200 Ohms = 150mA (This is 5x to 15x more than RCDs and never fully switch OFF the welding output in 0.3s)

The trip calibration of safety switches (RCD) in hospitals is 10mA while in domestic areas it is 30 mA. They are also designed to switch off in 0.3 seconds and remain off until reset manually. VRDs on the other hand reset automatically and the user is unsure whether the output welding voltage has been safely reduced or not.

In an OH&S article it mentions about electric shocks in welding and says "Currents of approximately six milliamperes (6 mA) can be enough to cause death in some instances". It also mentions that "As a general rule, remind workers to turn the equipment off when not in use".