What are AC Electrical Protections?

The AC Protections collection includes circuit breakers, residual current devices, and surge arresters for the alternating current side of a PV system (inverter output, branch circuits, and main distribution).

Advantages and limitations

• Personal safety through appropriate residual current devices.
• Equipment protection against overloads, short circuits, and overvoltages.
• Limitation: select the appropriate tripping curve, rating, sensitivity, and breaking capacity for the installation.

Applications

• Grid-tied self-consumption and hybrid systems.
• Protection of branch circuits to critical loads.

How to choose

• Rate circuit breakers by In and curve (B/C/D) according to load type.
• Select residual current devices AC/A/F/B according to the inverter and present harmonics.
• Coordinate SPD with the grid and location (type II in secondary panel, I+II at main distribution when applicable).

Specifications (indicative)

Related

Coordinate with DC Protections and use suitable Cables and Terminals. More in Electrical Material.