External fire exposure to roofs in combination with photovoltaic (PV) arrays – Test method(s)

This Technical Report provides test methods for the assessment of external fire exposure to roofs in combination with photovoltaic (PV) arrays which characterize potential impacts of PV arrays to an existing fire rating of roofs from an external fire exposure. The performance of roofs without PV to external fire exposure is defined in CEN/TS 1187.
The test methods of CLC/prTR 50670 are only applicable to roof added installations. Building integrated PV is not covered by this standard.
The test method refers to PV modules as test specimens without a specific mounting system as well as combinations of PV modules with particular mounting systems on tilted roofs and flat roofs.

Externe Feuereinwirkung auf Dächer in Kombination mit Photovoltaik (PV)-Arrays - Testmethode (n)

Exposition des toitures équipées de modules photovoltaïques (PV) à un feu extérieur - Méthode(s) d’essai

Izpostavitev streh požaru z zunanje strani v kombinaciji s fotonapetostnimi (PV) sistemi - Metode preskušanja

To tehnično poročilo določa preskusne metode za oceno izpostavitve streh požaru z zunanje strani v kombinaciji s fotonapetostnimi (PV) sistemi, ki označujejo morebitni vpliv fotonapetostnih sistemov na obstoječo oceno izpostavitve streh požaru z zunanje strani. Zmogljivost streh brez fotonapetostnih sistemov pri izpostavitvi požaru z zunanje strani je opredeljena v standardu CEN/TS 1187.
Preskusne metode iz standarda CLC/prTR 50670 se uporabljajo samo za dodatne namestitve na strehah. Ta standard ne zajema fotonapetostnih sistemov, vgrajenih v stavbe.
Preskusna metoda obravnava fotonapetostne module kot preskušance brez posebnega sistema za namestitev in kombinacije fotonapetostnih modulov s posebnimi sistemi za namestitev na nagnjene in ploščate strehe.

General Information

Status
Published
Publication Date
12-Jan-2017
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Jan-2017
Due Date
18-Mar-2017
Completion Date
13-Jan-2017

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SLOVENSKI STANDARD
SIST-TP CLC/TR 50670:2017
01-februar-2017
Izpostavitev streh požaru z zunanje strani v kombinaciji s fotonapetostnimi (PV)
sistemi - Metode preskušanja

External fire exposure to roofs in combination with photovoltaic (PV) arrays – Test

method(s)
Externe Feuereinwirkung auf Dächer in Kombination mit Photovoltaik (PV)-Arrays -
Testmethode (n)

Exposition des toitures équipées de modules photovoltaïques (PV) à un feu extérieur -

Méthode(s) d’essai
Ta slovenski standard je istoveten z: CLC/TR 50670:2016
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
27.160 6RQþQDHQHUJLMD Solar energy engineering
91.060.20 Strehe Roofs
SIST-TP CLC/TR 50670:2017 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CLC/TR 50670:2017
---------------------- Page: 2 ----------------------
SIST-TP CLC/TR 50670:2017
TECHNICAL REPORT CLC/TR 50670
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
December 2016
ICS 13.220.50; 27.160; 91.060.20
English Version
External fire exposure to roofs in combination with photovoltaic
(PV) arrays - Test method(s)

Exposition des toitures équipées de modules Externe Feuereinwirkung auf Dächer in Kombination mit

photovoltaïques (PV) à un feu extérieur - Méthode(s) Photovoltaik (PV)-Arrays - Testmethode (n)

d'essai
This Technical Report was approved by CENELEC on 2016-09-05.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. CLC/TR 50670:2016 E
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SIST-TP CLC/TR 50670:2017
CLC/TR 50670:2016 (E)
Contents Page

European foreword ................................................................................................................. 3

Introduction............................................................................................................................. 4

1 Scope ............................................................................................................................... 5

2 Normative references ....................................................................................................... 5

3 Terms and definitions ....................................................................................................... 5

4 General ............................................................................................................................ 7

5 Test apparatus ................................................................................................................. 7

5.1 Gas burner .............................................................................................................. 7

5.2 Test environment and measurements ...................................................................... 8

5.3 Conditioning ............................................................................................................ 8

5.4 Test deck ................................................................................................................ 8

6 Test procedures ............................................................................................................... 9

6.1 General ................................................................................................................... 9

6.2 Placement of source of ignition on top of the PV module ......................................... 9

6.3 Placement of source of ignition between PV module and pitched-roofs .................. 10

6.4 Placement of source of ignition between PV module and flat roofs ........................ 11

7 Observations and measurements.................................................................................... 11

7.1 General ................................................................................................................. 11

7.2 Placement of source of ignition on top of the PV module ....................................... 11

7.3 Placement of source of ignition between PV module and pitched-roofs .................. 12

7.4 Placement of source of ignition between PV module and flat roofs ........................ 12

8 Reporting ....................................................................................................................... 12

Bibliography .......................................................................................................................... 13

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SIST-TP CLC/TR 50670:2017
CLC/TR 50670:2016 (E)
European foreword

This document (CLC/TR 50670:2016) has been prepared by CLC/TC 82 “Solar Photovoltaic Energy

Systems”.

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.

Framing components of the PV modules that are made of polymeric materials are not covered within

this document and will have to be addressed in a future revision.
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SIST-TP CLC/TR 50670:2017
CLC/TR 50670:2016 (E)
Introduction

This CENELEC Technical Report (TR) defines test methods for the assessment of external fire

exposure to photovoltaic (PV) arrays. The determination of such fire behaviour is important when

photovoltaic systems are installed on roofs to evaluate if an intensification of a fire threat can be

expected. With this regard, explicitly roof-integrated PV is not part of this TR.

The scenario of burning brands that are released from a neighbouring building is well defined for plain

roofing assemblies through the classification standard of EN 13501-5 and the relevant test methods of

CEN/TS 1187. Accordingly, the methods described herewith focus on PV modules and the influence

to roof substructures in general and address tilted and flat-roof installations from burning droplets and

radiant heat after ignited through a gas burner.

Roofing assemblies and substructures are exemplary replaced by calcium carbonate plates to allow

free monitoring and characterization of the potential burning behaviour of PV modules.

This Technical Report also encounters potential burning brands that may reach spaces between the

PV array and roof in a realistic installation.

This Technical Report does not contain information on the level of acceptable performance, but on

observations and measurements.

This Technical Report enters new fields of expertise and displays accordingly the current state of best

knowledge basing on available data in the industry. More technical data and test results will be

generated to further develop the TR.

CAUTION — The attention of all persons concerned with managing and carrying out these

tests is drawn to the fact that fire testing can be hazardous and that there is a possibility that

toxic and/or harmful smoke and gases can be evolved during the test. An assessment of all

potential hazards and risks to health should be made and safety precautions should be

identified and provided. Written safety instructions should be issued. Appropriate training

should be given to all relevant personnel. Laboratory personnel should ensure that they follow

written safety instructions at all times.
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SIST-TP CLC/TR 50670:2017
CLC/TR 50670:2016 (E)
1 Scope

This Technical Report provides test methods for the assessment of external fire exposure to roofs in

combination with photovoltaic (PV) arrays which characterize potential impacts of PV arrays to an

existing fire rating of roofs from an external fire exposure. The performance of roofs without PV to

external fire exposure is defined in CEN/TS 1187.

The test methods of CLC/TR 50670 are only applicable to roof added installations. Building integrated

PV is not covered by this standard.

The test method refers to PV modules as test specimens without a specific mounting system as well

as combinations of PV modules with particular mounting systems on tilted roofs and flat roofs.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

EN ISO 13943:2010, Fire safety — Vocabulary (ISO 13943:2008)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 13943:2010 and the

following apply.
3.1
PV array
mechanically integrated assembly of modules or panels and its support structure

Note 1 to entry: An array does not include its foundation, tracking apparatus, thermal control, and other such

components.
[SOURCE: IEC 61277, modified]
3.2
external fire

progression and extent of sustained flaming across the exposed surface of the specimen

[SOURCE: CEN/TS 1187:2012]
3.3
tilted roof
roof with an inclination angle of at least 15°
3.4
flat roof
roof with an inclination less than 15°
3.5
roof covering
uppermost layer of a roof

Note 1 to entry: This layer can comprise single layer or multiple layer coverings.

[SOURCE: CEN/TS 1187:2012]
3.6
fire penetration

appearance on the underside of the specimen of any sustained flaming or glowing due to combustion,

including the occurrence of any flaming droplets falling from the underside
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SIST-TP CLC/TR 50670:2017
CLC/TR 50670:2016 (E)

Note 1 to entry: Charring and/or discolouration are not to be regarded as fire penetration (for tests 1 and 3).

[SOURCE: CEN/TS 1187:2012, modified]
3.7
damaged material

material that has been burnt, charred, melted or otherwise visually changed by heat

Note 1 to entry: Discolouration and soot deposits are not to be regarded as damaged material.

[SOURCE: CEN/TS 1187:2012, modified]
3.8
calcium carbonate plate
board/plate made of calcium carbonate or calcium silicate
3.9
product
PV Module about which information is required
[SOURCE: CEN/TS 1187:2012, modified]
3.10
specimen

representative section of the roof/roof covering prepared for the purpose of the test

[SOURCE: CEN/TS 1187:2012]
3.11
test deck
test deck on which the PV module will be mounted
3.12
expo
...

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