DD CLC/TS 50539-12:2010

Low-voltage surge protective devices — Surge protective devices for specific application including d.c.

Part 12: Selection and application principles — SPDs connected to photovoltaic installations

Foreword

This Technical Specification was prepared by the Technical Committee CENELEC TC 37A, Low voltage surge protective devices.

The text of the draft was submitted to the formal vote and was approved by CENELEC as CLC/TS 50539-12 on 2009-10-30.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights.

The following date was fixed:
– latest date by which the existence of the CLC/TS has to be announced at national level

Scope

This Technical Specification deals with the protection of PV installations against overvoltages. It deals with the protection of the PV installation against surge overvoltages induced by direct and indirect lightning strikes.

If such a PV installation is connected to an AC-supply system this document is applicable as a complement of HD 60364-4-443, HD 60364-5-534 and HD 60364-7-712 and also CLC/TS 61643-12. Surge protective devices (SPD) installed on the AC side shall comply with EN 61643-11.

NOTE 1: Due to the very specific electrical setup of PV installations on the DC side, only surge protective devices especially dedicated to PV installations shall be used to protect the DC side of such installations.

NOTE 2: Taking into account the sensitivity and of the setting up of the photovoltaic modules, a detailed attention must be paid to the protection of the structure itself (building) against direct effects of the lightning; this subject is covered by EN 62305 series.