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SLP PV 500 V Solar PV SPD for 500V DC Application

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Photovoltaic arrays are costly to install and demanding in terms of technology. Their service life must be measured

in decades to see a return on the invested funds. Manufacturers usually provide about a twenty-year guarantee for

photovoltaic systems.
To provide trouble-free technology throughout its service life, it is necessary to include comprehensive protection against

atmospheric and induced overvoltage at the design stage to implement the technology into the project.

Protection must be provided not only at the output side of the inverter, but also at the photovoltaic panels.

Solar photovoltaic arrays are usually installed on rooftops, or on a “greenfield“.

As for the anticipated risks (pursuant to EN 62305-2), direct or near lightning strikes are considered. Overvoltage or

lightning strike can bring about financial loss, and for photovoltaic systems installed on rooftops where individuals could

be working, injury should also be considered.

Photovoltaic system designs, including lightning and overvoltage suppression, shall comply with the HD 60364-7-712

standard (Electrical installations of buildings – Solar photovoltaic (PV) systems), EN 61173 (Overvoltage protection for

energy produced by photovoltaic systems), technical specification CLC/TS 50539-12 (SPD for specific application including

DC – Selection and application principles – SPDs connected to PV installations) and the group of EN 62305 standards

(Lightning protection).

The core (key device) of the whole photovoltaic system is the inverter, so the lightning and overvoltage protection should

be focused on the inverter and, it should be incorporated into the whole lightning and overvoltage protection system.

Furthermore, photovoltaic units and their bearing metal structures should be integrated into the grounding design.

Selection of SPDs:

• maximum continuous operating voltage of SPD UCPV must be higher than or equal to 1,2 time UOC STC

• if a separation distance "s" is kept between the lightning conductor system (LPS) and the photovoltaic panels (insulated

LPS) – install products SLP-PVxxx (otherwise FLP-PVxxx)

• if distance between inverter and PV modules is longer than 10 m, two SPDs on DC side are necessary to protect both

the PV modules (one SPD in front of the PV modules) and the inverter (one SPD in front of the inverter). Otherwise it is

possible to use only one SPD (generally in front of the inverter).

• to complete the protection system an SPD must be installed on AC side of the inverter and an SPD to protect data

communication lines of the inverter.

All SPDs for PV are tested in accordance with prEN 50539-11 and French standard UTE C 61-740-51

For Catalouge,Kindly check Attachment.


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