DC electrical protections for photovoltaics

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DC Electrical Protections

Las Protecciones Eléctricas en CC cubren la parte de continua del campo FV: fusibles gPV, seccionadores, magnetotérmicos y SPD PV para sobretensiones.

Imprescindibles para seguridad y coordinación con el inversor. Reducen riesgos de cortocircuitos, arcos y sobretensiones en strings y combiners.

What are DC Electrical Protections?

The DC Protections collection includes specific devices for PV strings and DC buses: gPV fuses, load-break disconnectors, DC circuit breakers, and PV-type surge protection devices.

Advantages and limitations

Safety against short circuits and ground faults.
Inverter protection and limitation of damage from overvoltages.
Limitation: curve and breaking capacity must match actual voltage and current.

Applications

String protection and grouping in combiner boxes.
Safe disconnection for maintenance.

How to choose

Check Ucpv (maximum DC voltage) and Isc of the generator.
Coordinate SPD with the system topology and the distance to the inverter.
Install in enclosures with suitable IP rating.

Specifications (indicative)

Fuses	gPV, rating according to Isc and number of strings
Disconnection	DC under load, poles and Ucpv as appropriate
SPD PV	Type II/III depending on location
MT curve	Specific DC curves