DCVG Survey Equipment

Caltech Engineering Services- India offers basic and standard DCVG equipment.

DCVG-UK manufactured useful equipment. when DC is applied to a pipeline in the same manner as in cathodic protection, a voltage gradient is established in the ground due to the passage of current through the resistive soil to the bare steel exposed at a coating fault.

The voltage gradient becomes larger and more concentrated the greater the current flowing and the closer you are to a coating fault location. In general, the larger the fault, the greater the current flow and hence bigger the voltage gradient.

The direct current voltage gradient method (DCVG) uses a sensitive mili-volt meter, to indicate the potential difference between two copper/copper sulphate half cells placed in the soil in the voltage gradient at ground level. If spaced two metres apart in a voltage gradient, one half cell will adopt a more positive potential than the other, which thus enables the size of the gradient and direction of the current flow causing the voltage gradient to be established.

Always specify the type and switching capacity of the required interrupter for your DCVG Set

• 50 Amp Stand Alone.

• 125 Amp Stand Alone.

• 50 Amp Satellite Synchronised

• 125 Amp Satellite Synchronised