Caja combinadora

Most problems found inside a PV combiner box a year after handover are not caused by the protection devices themselves. They come from how the enclosure was mounted, how the cables were glanded, how the terminals were tightened, and what was never verified before the strings were energised. This guide covers how to install a […]

Compara las cajas de conexión fotovoltaicas fabricadas en acero con recubrimiento en polvo, acero inoxidable, aluminio, ABS/PC y GRP/poliéster en cuanto a corrosión, envejecimiento por rayos UV, disipación del calor, peso, fijación, índice de protección (IP) y coste, utilizando una matriz de selección basada en el entorno.

Por qué una caja combinadora solar necesita tanto un MCB de CC como un SPD de CC: la división de funciones entre la protección contra sobrecorriente y la protección contra sobretensiones transitorias; por qué ninguno de los dispositivos puede sustituir al otro; cómo se coordinan en el bus de CC, incluyendo el requisito de protección de respaldo del SPD; y cómo cambia esta combinación entre sistemas de 1000 V CC y 1500 V CC.

“Combiner box vs junction box” is one of the most common points of confusion in PV design, and it is not a cosmetic one. The two enclosures look similar on a wall, are both described loosely as “the box where the strings are terminated”, and are not interchangeable. A junction box is a passive termination […]

Solar combiner box maintenance is the cheapest protection a PV asset can buy. A short scheduled inspection finds a hardening door gasket, a slack terminal or a saturated desiccant while they are still minor defects; the same three found two years later are an earth fault, a discoloured busbar and a lost production week. This […]

Solar DC protection is a chain, not a purchase. In one array you can have a reverse current from nine healthy strings into one faulted string, a lightning-induced impulse arriving on the same conductors, and a maintenance team that needs to work on the inverter DC input — three problems that share a cable and […]