PD CLC/TS 50539-12:2013

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 document (CLC/TS 50539-12:2013) has been prepared by CLC/TC 37A “Low voltage surge protective devices”.

This document supersedes CLC/TS 50539-12:2010.

CLC/TS 50539-12:2013 includes the following significant technical changes with respect to CLC/TS 50539-12:2010:

a) scope and definitions have been revised to align CLC/TS 50539-12 with EN 50539-11;

b) structure of the document has been revised for better clarification;

c) only Type 1 d.c. SPDs can be used for cases described in 6.4;

d) multi-earthed solar systems have been introduced for SPD selection and for current sharing calculation;

e) Table 1 (impulse withstand) has been introduced;

f) current sharing in Annex A has been revised;

g) Annex B has been created;

h) risk assessment has been introduced in Annex C.

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

Scope

This Technical Specification describes the principles for selection, location, coordination and operation of SPDs to be connected to PV installations. The d.c. side is rated up to 1500 V d.c. and the a.c. side, if any, is rated up to 1000 V rms 50 Hz.

The electrical installation starts from a PV generator or a set of interconnected PV modules with their cables, provided by the PV generator manufacturer, up to the user installation or the utility supply point.

For PV installations including batteries, additional requirements will be necessary.

NOTE 1 HD 60364-7-712, CLC/TS 61643-12 and EN 62305-4 are also applicable.

NOTE 2 This Technical Specification deals only with SPDs, and not with SPDs components integrated inside equipment.