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Surge protective device with a modular width of 72 mm provides protection against surges resulting from direct and indirect lightning strikes in buildings with LPSs and PV panel separation distances that have not been maintained. The ESPPV V T12 12,5 series surge arresters are designed as monoblocks with increased mechanical strength (no replaceable modules). Surge arrester in Y configuration. Device equipped with an optical indicator informing about the device's status: green - functional, red - module needs to be replaced. The device can be installed in two positions on a TH35 rail. Continuous operating voltage for the PV circuit voltage: UCPV ≥ 1.2 × UOC STC (Open Circuit Voltage under Standard Test Conditions). Data sheets for the devices can be downloaded at https://elkobis.com.pl/kategoria-kb/charakterystyki-urzadzen-spd/