Combiner Box Handles 1000 Vdc Operation

Combiner box assembly satisfies UL 1741 standard at 1,000 Vdc, meeting the new photovoltaic standard certification. Critical components of the box include:

Wöhner PV fuse holders and busbar to meet UL 4248-18; and 1,000 Vdc dc-rated disconnect switch.

While higher 1,000 Vdc operation is common in European markets, the standards for UL—used throughout North America—were, until recently, written under system voltage at 600 volts. This lower operation is less efficient due to voltage drop over large areas, typically experienced in large solar fields that expand over hundreds of acres. This combiner box supports cost-effective operation while still protecting wires and ensuring conductors do not short circuit or otherwise malfunction.

Pentair Technical Products
www.hoffmanonline.com

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