Specifications

Transtig 200Pi, 250Pi, 300Pi
20
7. Voltage Reduction Device (VRD)
WARNING
WELDING IN HAZARDOUS ENVIRONMENTS
Before welding in hazardous environments the VOLTAGE REDUCTION DEVICE (VRD) MUST BE TURNED
ON. For example confined spaces, wet areas and hot humid conditions are classed as hazardous environments.
WARNING
VRD TURN ON PROCEDURE
CIGWELD recommends that an Accredited CIGWELD Service Agent TURNS ON the VOLTAGE REDUCTION
DEVICE (VRD) as they have the knowledge and equipment to preform this operation.
WARNING TO EMPLOYERS
Workplace safety legislation imposes substantial duties on employers to provide a safe workplace and equipment for its
employees.
If an employer fails to do so criminal prosecution of the company and its senior officers and employees may result with
substantial penalties including fines and in certain cases jail sentences.
It is therefore essential employers acquire safe equipment and ensure its employees are properly trained in its use.
7.1 VRD Specification
With the VRD TURN ON, this equipment meets the following specifications
Description
Transtig 200Pi,
250Pi, 300Pi Notes
VRD Open Circuit Voltage 15.3 to 19.8V Open circuit voltage between welding
terminals
VRD Resistance 148 to 193 ohms The required resistance between welding
terminals to turn ON the welding power
VRD Turn OFF Time 0.2 to 0.3 seconds The time taken to turn OFF the welding
power once the welding current has
stopped
7.2 VRD Maintenance
Routine inspection and testing (power source)
An inspection of the power source, an insulation resistance test and an earthing resistance test shall
be carried out in accordance with clause 4.1 of AS 1647.2
a) For transportable equipment, at least once every 3 months; and
b) For fixed equipment, at least once every 12 months.
The owners of the equipment shall keep a suitable record of the periodic tests.
Note 3
A transportable power source is any equipment that is not permanently connected and fixed in the position
in which it is operated.