RCD Testers

RCD Testers

When working as an electrician, proper professional tools are paramount to ensure efficiency and personal safety. After all, electricity is not something anyone should play with as it can result in serious injuries or even death. The RCD testers are vital for responsible electric engineering industry because they prevent fire and electrocution in case of an electrical fault. Learn more about electrical equipment and find a tester for your needs.

Basics of RCD Testers

The acronym RCD stands for "residual current devices." The RCD tester is a very accurate device that trips even within thousandths of a second under fault currents. These currents could be as small as 5 mA. A current transformer forms the core of the tester and the line and neutral conductors wind in opposite directions. Without an earth fault current flowing, the line and the neutral current windings generate equal magnetomotive force. As a result, there is no flux in the transformer and the latter does not create any current. In case of a fault current, a flux occurs in the transformer, inducing a current in the detecting winding.

Checking Your RCD Tester

Most RCD testers include a mechanical trip button that you should press once every three months. This indicates whether the tester works mechanically and is sufficient information for an average tester user. However, contractors would need to know how quickly exactly the RCD operates under different fault conditions as they need to meet the requirements of wiring regulations.

Legislation Related to RCD Testers

Electrical works are something to take seriously, so regulation is important. The Australian Standard 3760 requires testing for RCDs. However, you do not always need a standalone tester for this purpose, as some multifunctional electric testers, electric circuit multimeters may have this function already included. Check your existing equipment and see whether it is up to the standards.

RCD Tester Price

The quality is often dependent on the price and this stands true for electrical test equipment as well. Very low cost RCD testers have the tendency to not test accurately and they could burn out easily. They could also create irregular fault currents and not trip all types of RCD. The trip currents on more expensive RCD testers are regulated, and these testers are less likely to fail.