DC-side protection for photovoltaic systems: gPV fuse links and holders, DC isolators, Type 1+2 surge protection and populated combiner boxes.
Compare model purpose, core specifications and application fit, then continue to the detailed purchasing information.
A populated DC combiner box for the string side of a rooftop or ground-mount array — fuses on both polarities, an isolating DC breaker for maintenance, and a 1000V surge protector, in an IP65 enclosure rated for outdoor UV exposure.
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gPV fuse links in the two sizes the PV market actually uses: 10 × 38 for 1000V systems and 10 × 85 for 1500V. Both interrupt in under a millisecond and are rated for the full-range duty a string fuse has to cover.
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DIN-rail holders for the matching PV links, at 1000V and 1500V. The 1000V version carries a blown-fuse indicator, which is what makes a fault findable on an array without pulling every holder.
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The 1500V half of the fuse pairing: a DIN-rail base for the 10 × 85 cartridge, supplied without the fuse so the rating is chosen against the string. Where the 1000V holder carries a blown-fuse indicator, this one does not, which is worth knowing before it goes into an array that has to be faultfound from the front.
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Overcurrent and short-circuit protection for the DC side of a PV installation, in one, two and four pole versions. Pole count is what sets the working voltage here — 250V, 500V and 1000V respectively — because the poles are wired in series to share the arc, and a DC arc has no zero crossing to help extinguish it.
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Type 1+2 surge protection for the DC side, in two and three pole versions up to 1500V. A PV array is an exposed conductive structure on a roof, so the lightning-current duty here is the Type 1 case rather than the overvoltage-only case.
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A four-pole DC isolator in its own IP65 thermoplastic enclosure, for mounting at the array where there is no board to put a modular device in. The cover interlocks so it can only be removed with the switch off.
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The modular version of the same isolating duty, for mounting inside a combiner box or DC board. Rated to the DC-PV2 utilization category, which is the one that covers switching a live string under load.
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