AEL-AD33 Single-Phase Installations Faults Application

In a low-voltage electrical system, one of the objects to study are single-phase faults. When a single-phase fault happens, it affects at the rest of the electric system because it produces a very increase current which also affects the voltages of the rest of the equipment connected to the same grid, this means if we have a single-phase fault, we could damage the rest of the charges of the same electrical system. In addition, the safety of persons is very important in this kind of installations. Therefore, the study of some kind of protections and the selectivity is very significant.

The Single-Phase Installations Faults Application, "AEL-AD33", has been designed to study several protections belonging to homeinstallations. Through the safety elements, the student can simulate different faults and verify the reasons why each type of protection acts.

It includes some innovative electric devices for the protection of people and installations against the effects of electric current, which ensurethe continuity of power availability, as well as people safety. It includes a single-phase transformer to simulate earth derivations undersafety conditions. It includes protections for: differential protection with automatic reset and differential protection with variable sensivity.

To check all protections, a variable resistor is included to control current derivations. It also has meters to know the amount of derivationcurrent and verify the protection´s sensitivity.