Balance-of-system components for photovoltaic systems - Design qualification natural environments

Establishes requirements for the design qualification of balance-of-system (BOS) components used in terrestrial photovoltaic systems. Is suitable for operation in indoor, conditioned or unconditioned; or outdoor in general open-air climates, protected or unprotected. Is written for dedicated solar components such as batteries, inverters, charge controllers, system diode packages, heat sinks, surge protectors, system junction boxes, maximum power point tracking devices and switch gear, but may be applicable to other BOS components.

BOS-Bauteile für photovoltaische Systeme - Bauarteignung natürliche Umgebung

Composants BOS des systèmes photovoltaïques - Qualification et essais d'environnement

Spécifie les exigences pour la qualification après les essais d'environnement des composants de systèmes photovoltaïques pour application terrestre adaptés à un fonctionnement de longue durée à l'intérieur, conditionnés ou non conditionnés, ou à l'extérieur, à des climats typiques à l'air libre, protégés ou non protégés. Est destinée aux composants spécifiques au solaire tels que batteries, onduleurs, contrôleurs de charge, connecteurs, ensembles de diodes, radiateurs, limiteurs de tension, boîtes de jonction du système, dispositifs de suivi de la puissance maximale, appareillage, fils et câbles, mais peut être applicable à d'autres éléments complémentaires du système.

Sistemska tehnika fotonapetostnih sistemov - Ocena zasnove za naravna okolja (IEC 62093:2005)

General Information

Status
Published
Publication Date
17-May-2005
Drafting Committee
Parallel Committee
Current Stage
6060 - Document made available
Due Date
18-May-2005
Completion Date
18-May-2005

Buy Standard

Standard
EN 62093:2005
English language
42 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SIST EN 62093:2005SLOVENSKInovember 2005

STANDARDSistemska tehnika fotonapetostnih sistemov - Ocena zasnove za naravna okolja (IEC 62093:2005)Balance-of-system components for photovoltaic systems – Design qualification natural environments (IEC 62093:2005)©

Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljenoReferenčna številkaSIST EN 62093:2005(en)ICS27.160

EUROPEAN STANDARD
EN 62093 NORME EUROPÉENNE EUROPÄISCHE NORM

May 2005 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62093:2005 E
ICS 27.160
English version
Balance-of-system components for photovoltaic systems –
Design qualification natural environments (IEC 62093:2005)
Composants BOS des systèmes photovoltaïques –
Qualification et essais d'environnement (CEI 62093:2005)
BOS-Bauteile für photovoltaische Systeme –
Bauarteignung natürliche Umgebung (IEC 62093:2005)

This European Standard was approved by CENELEC on 2005-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EN 62093:2005 - 2 - Foreword The text of document 82/374/FDIS, future edition 1 of IEC 62093, prepared by IEC TC 82, Solar photovoltaic energy systems, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62093 on 2005-04-01. The following dates were fixed: – latest date by which the EN has to be implemented

at national level by publication of an identical
national standard or by endorsement
(dop)
2006-01-01 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow)

2008-04-01 Annex ZA has been added by CENELEC. __________ Endorsement notice The text of the International Standard IEC 62093:2005 was approved by CENELEC as a European Standard without any modification. __________

- 3 - EN 62093:2005
Annex ZA
(normative)
Normative references to international publications

with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60068-1 - 1) Environmental testing Part 1: General and guidance

EN 60068-1 1994 2) IEC 60068-2-6 - 1) Part 2: Tests - Test Fc: Vibration (sinusoidal)

EN 60068-2-6 1995 2) IEC 60068-2-21 - 1) Part 2-21: Tests - Test U: Robustness of terminations and integral mounting devices

EN 60068-2-21 1999 2) IEC 60068-2-27 - 1) Part 2: Tests - Test Ea and guidance: Shock

EN 60068-2-27 1993 2) IEC 60068-2-30 - 1) Part 2: Tests - Test Db and guidance: Damp heat, cyclic (12 + 12-hour cycle)

EN 60068-2-30 1999 2) IEC 60068-2-75 - 1) Part 2-75: Tests - Test Eh: Hammer tests EN 60068-2-75 1997 2) IEC 60068-2-78 - 1) Part 2-78: Tests - Test Cab: Damp heat, steady state

EN 60068-2-78 2001 2) IEC 60068-3-6 - 1) Part 3-6: Supporting documentation and guidance - Confirmation of the performance of temperature/humidity chambers

EN 60068-3-6 2002 2) IEC 60410 - 1) Sampling plans and procedures for inspection by attributes

- - IEC 60529 - 1) Degrees of protection provided by enclosures (IP Code)
EN 60529 + corr. May 1991 2) 1993

IEC 60721-2-1 - 1) Classification of environmental conditionsPart 2: Environmental conditions appearing in nature - Temperature and humidity

HD 478.2.1 S1 1989 2)
1) Undated reference. 2) Valid edition at date of issue.

EN 62093:2005 - 4 - Publication Year Title EN/HD Year IEC 60904-3 1989 Photovoltaic devices Part 3: Measurement principles for terrestrial photovoltaic (PV) solar devices with reference spectral irradiance data

EN 60904-3 1993 IEC 61215 - 1) Crystalline silicon terrestrial photovoltaic (PV) modules - Design qualification and type approval

EN 61215 2005 2) IEC 61345 - 1) UV test for photovoltaic (PV) modules

EN 61345 1998 2) IEC 61427 2005 Secondary cells and batteries for photovoltaic energy systemes (PVES) - General requirements and methods of test

EN 61427 - 3) IEC 61646 - 1) Thin-film terrestrial photovoltaic (PV) modules - Design qualification and type approval

EN 61646 1997 2) IEC 61683 - 1) Photovoltaic systems - Power conditioners - Procedure for measuring efficiency

EN 61683 2000 2) IEC 62262 - 1) Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code)

EN 62262 2002 2) ISO/IEC 17025 - 1) General requirements for the competence of testing and calibration laboratories

EN ISO/IEC 17025 2000 2)
3) To be published.

NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD62093Première éditionFirst edition2005-03Composants BOS des systèmes photovoltaïques –Qualification et essais d'environnement Balance-of-system components for photovoltaic systems – Design qualification natural environments Pour prix, voir catalogue en vigueur For price, see current catalogue© IEC 2005

Droits de reproduction réservés

Copyright - all rights reservedAucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission,

3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch

Web: www.iec.ch CODE PRIX PRICE CODE WCommission Electrotechnique InternationaleInternational Electrotechnical Commission

62093 ¤ IEC:2005 – 3 –

CONTENTS FOREWORD.........................................................................................................................7 1Scope and object..........................................................................................................112Normative references...................................................................................................113Sampling......................................................................................................................134Marking........................................................................................................................155Documentation.............................................................................................................155.1General...............................................................................................................156Testing.........................................................................................................................216.1Service use.........................................................................................................216.2Test sequence.....................................................................................................217Pass criteria.................................................................................................................277.1General pass criteria...........................................................................................277.2Specific requirements for charge controllers.........................................................297.3Specific requirements for secondary batteries......................................................298Major visual defects......................................................................................................359Report..........................................................................................................................3510Modifications................................................................................................................3511Test procedures...........................................................................................................3511.1Visual inspection...............................................................................................3511.2Functioning tests..............................................................................................3711.3Specific performance tests for components........................................................4511.4Insulation test...................................................................................................4911.5Outdoor exposure test.......................................................................................5111.6Protection against mechanical impacts (IK-code)...............................................5311.7Protection against dust, water and foreign bodies (IP-code)...............................5311.8Shipping vibration test.......................................................................................5511.9Shock test........................................................................................................5511.10UV test.............................................................................................................5711.11Thermal cycling test..........................................................................................5911.12Humidity-freeze test..........................................................................................6311.13Damp heat test.................................................................................................6711.14Robustness of terminals test.............................................................................6911.15Damp heat, cyclic test.......................................................................................71 Annex A (informative)

Switching thresholds for charge controllers using the battery voltage as the main parameter for the switching algorithm...................................................75Figure 1 – Qualification test sequence.................................................................................27Figure 2 – Cycling conditions of the efficiency test procedure..............................................33Figure 3 – Diagram of the test set-up without measuring equipment.....................................41Figure 4 – Thermal cycling test...........................................................................................61Figure 5 – Humidity-freeze test...........................................................................................65

62093 ¤ IEC:2005 – 5 – Table 1 – Summary of test levels........................................................................................23Table 2 – Temperature limits for thermal cycling test...........................................................61Table 3 – Temperature limits for humidity-freeze test...........................................................63Table 4 – Temperature limits for damp heat test..................................................................67Table 5 – Temperature limits for damp heat, cyclic test........................................................73

62093 ¤ IEC:2005 – 7 – INTERNATIONAL ELECTROTECHNICAL COMMISSION ___________BALANCE-OF-SYSTEM COMPONENTSFOR PHOTOVOLTAIC SYSTEMS – DESIGN QUALIFICATION NATURAL ENVIRONMENTS FOREWORD1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62093 has been prepared by IEC technical committee 82: Solar photovoltaic energy systems. The text of this standard is based on the following documents: FDIS Report on voting 82/374/FDIS 82/380/RVD Full information on the voting for approval can be found in the report on voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

62093 ¤ IEC:2005 – 9 – The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be

• reconfirmed; • withdrawn; • replaced by a revised edition, or • amended.

62093 ¤ IEC:2005 – 11 – BALANCE-OF-SYSTEM COMPONENTSFOR PHOTOVOLTAIC SYSTEMS – DESIGN QUALIFICATION NATURAL ENVIRONMENTS 1 Scope and object This International Standard establishes requirements for the design qualification of balance-of-system (BOS) components used in terrestrial photovoltaic (PV) systems. This standard is suitable for operation in indoor, conditioned or unconditioned; or outdoor in general open-air climates as defined in IEC 60721-2-1, protected or unprotected. It is written for dedicated solar components such as batteries, inverters, charge controllers, system diode packages, heat sinks, surge protectors, system junction boxes, maximum power point tracking devices and switch gear, but may be applicable to other BOS system components. This standard is based on that which is specified in IEC 61215 and IEC 61646 for the design qualification of PV modules. However, changes have been made to account for the special features of the balance-of-system components, and to add different levels of severity for the different service environments. Dust, fungus, insects, shipping vibration and shock, and protection class have been added to the appropriate environmental categories. The high and low temperature and humidity limits have also been modified for the appropriate service environments.

This standard does not apply to photovoltaic modules. These are covered by IEC 61215 or IEC 61646. Also, this standard does not apply to concentrator modules or to complete PV systems. Specific electrical safety aspects are not part of this standard.

This standard is applicable to lead-acid and nickel-cadmium cells and batteries. Other electrochemical storage systems will be included when they become available. The object of this test sequence is to determine the performance characteristics of each BOS components and to show, as far as possible within reasonable constraints of cost and time, that the component is capable of maintaining this performance after exposure to the simulated service natural environmental conditions for which it is intended to be applicable as specified by the manufacturer. The actual life expectancy of components so qualified will depend on their design, their environment and the system conditions under which they are operated. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-1, Environmental testing – Part 1: General and guidance IEC 60068-2-6, Environmental testing – Part 2: Tests – Test Fc: vibration (sinusoidal)IEC 60068-2-21, Environmental testing – Part 2-21: Tests – Test U: Robustness of terminations and integral mounting devices

62093 ¤ IEC:2005 – 13 – IEC 60068-2-27, Environmental testing – Part 2: Tests. Test Ea and guidance: ShockIEC 60068-2-30, Environmental testing – Part 2: Tests. Test Db and guidance: Damp heat, cyclic (12 + 12-hour cycle) IEC 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state IEC 60068-3-6, Environmental testing – Part 3-6: Supporting documentation and guidance – Confirmation of the performance of temperature/ humidity chambers IEC 60410, Sampling plans and procedures for inspection by attributesIEC 60529, Degrees of protection provided by enclosures (IP Code) IEC 60721-2-1, Classification of environmental conditions – Part 2-1: Environmental conditions appearing in nature – Temperature and humidity IEC 60904-3:1989, Photovoltaic devices – Part 3: Measurement principles for terrestrial photovoltaic (PV) solar devices with reference spectral irradiance data IEC 61215, Crystalline silicon terrestrial photovoltaic (PV) modules – Design qualification and type approval

IEC 61345, UV test for photovoltaic (PV) modules IEC 61427:2005, Secondary cells and batteries for solar photovoltaic energy systems – General requirements and methods of test IEC 61646, Thin film silicon terrestrial photovoltaic (PV) modules – Design qualification and typeapprovalIEC 61683,Photovoltaic systems – Power conditioners – Procedure for measuring efficiencyIEC 62262, Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code) ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories3 Sampling For qualification testing a quantity of at least three samples of a component (plus spares as desired) shall be taken at random from a production batch or batches, in accordance with the procedure given in IEC 60410. The components shall have been manufactured from specified materials and components in accordance with the relevant drawings and process sheets and shall have been subjected to the manufacturer's normal inspection, quality control and production acceptance procedures. The components shall be complete in every detail and shall be accompanied by the manufacturer's handling, mounting and connection instructions, including the maximum permissible system voltage. In the case of items, for example wires and cables, that do not have previously defined measures, a sufficient amount for the testing purposes shall be taken at random from a production batch or batches, in accordance with the procedure given in IEC 60410.

62093 ¤ IEC:2005 – 15 – 4 Marking Each component shall carry the following clear and indelible markings: – name, monogram or symbol of manufacturer/supplier; – type or model number; – serial/batch number, if practical; – the design service use of this component; outdoor unprotected, outdoor protected, indoor unconditioned and indoor conditioned; – polarity of terminals or leads (only colour coding is not permissible); – maximum system voltage for which the component is suitable; – nominal and minimum values of the power consumption, as specified by the manufacturer for the product type. The date (and preferably time) and place of manufacture shall be marked on the component or be traceable from the serial or batch number. NOTE Small components such as wires, connectors, fuses, etc. need not have these elaborate markings. The minimum information is name/monogram/symbol of manufacturer or supplier and the type or model number. 5 Documentation 5.1 General The documentation shall contain the following information (if relevant): − compliance with relevant standards (this is especially important with respect to European Directives and the related CE marking); − installation and disconnection instructions; − operating instructions; − service use of the component (see 6.1); − technical data (circuit diagram and technical specifications); − troubleshooting instructions; − safety warnings and instructions;

− information on spare parts; − warranty; − instructions for decommissioning and disposal. In particular, the documentation shall indicate (if relevant): a) Conditions of surroundings 1) Range of operating temperature 2) Range of storage temperature 3) Maximum relative humidity b) Physical properties of the component 1) Dimensions of the enclosure 2) Weight 3) Properties of the enclosure (material) 4) Fasteners 5)

Protection class (IP and IK Code)

62093 ¤ IEC:2005 – 17 – 6) Connecting terminals 7) Cables (inlet, pull relief, cross-sections)

8) Spare parts c) Electrical properties of the component 1) For charge controllers − Listing of incompatible and compatible battery types − Nominal voltage of input and output (V) − Maximum module current (A) − Maximum load current (A)

− Type of controller (series controller, shunt controller, etc.) − Working principle (PWM, two-point-regulation, state of charge algorithm, etc.)

− All used thresholds (V)
− Temperature compensation for the thresholds (mV/°C/cell)

− Quiescent current − Curve indicating input and output power/current vs. ambient temperature − Power consumption to be measured during operation immediately after deep discharge disconnection − Power consumption during operation at nominal voltage − Overload protection − Reverse-polarity protection − Definition of the allowable voltage area at the input and at the output side − Warning before load disconnect − Definition of the output behaviour in the case of no battery connection − Delayed load disconnection − Displays (LEDs, display, accuracy) − Additional functions (MPP tracking, etc.) − Maximum AC ripple on the battery charging current NOTEIf the negative terminal of the battery, module and load cannot be linked together, this must be clearly stated and the behaviour in such a case must be defined. 2) For batteries − Type of battery: NiCd, lead-acid, vented (flooded), valve-regulated, gas-tight sealed (NiCd only), tubular plate, flat plate, etc. − Nominal voltage − Specific gravity of the electrolyte − Capacity expressed in C120,C20,C10,C5− Charge retention expressed as a percentage: monthly self-discharge/nominal capacity − Endurance in cycles, measured according to IEC 61427 − Charging efficiency (see IEC 61427) − Instructions for starting up (the manufacturer must advise if there are special considerations for the initial charging with only the solar generator available as the power source), maintenance, and safety. − Transportation restrictions

62093 ¤ IEC:2005 – 19 – 3) For inverters − Maximum input current (A) − Maximum output current (A)

− Nominal input voltage and range (V) − Nominal output voltage and range (V) − Absolute maximum solar voltage (Voc)− Number of phases − Frequency (Hz) − Output voltage: sine wave, square wave or modified square wave, etc. − Galvanic separation

− Overload capability curve − Curve indicating output power at nominal input voltage vs. ambient temperature − Curve indicating maximum output power at nominal input voltage vs. ambient air-pressure (may be expressed in height of installation above sea-level) − Maximum ambient temperature − Type of load allowed, for example maximum cos(phi), regenerative loads − Earthing requirements − For standalone inverters: power consumption to be measured during operation immediately after deep discharge disconnection and in standby-mode (there may be several standby modes, e.g. sleep-mode, no-load mode, etc.) − Power consumption in standby-mode (there may be several standby modes, e.g. sleep-mode, low-solar-input-mode, etc.) − Efficiency curve according to IEC 61683 − Fuse required on the AC-side of the inverter: size and class − If applicable, recommended fuse on the DC-side of the inverter, size and class − Definition of the behaviour of the inverter during an overload situation and overload protection − Reverse-polarity protection on the DC-side − Warning before load disconnect, if relevant − Delayed load disconnection, if relevant − Displays (LED's, display, accuracy) − Additional functions (MPP tracking, etc.) − Total harmonic output distortion on a linear load at nominal conditions − Total harmonic output voltage distortion on non-linear loads at nominal conditions with a crest factor of 2,5 % − List of generic appliances, known to be incompatible with the inverter All data shall be verified in the course of the following test sequences. Data, which are missing or do not conform to the indications of the manufacturer, shall be conscientiously recorded.

62093 ¤ IEC:2005 – 21 – 6 Testing 6.1 Service use The test severities are based on the service use (to be indicated by the manufacturer) of the component. These are defined as follows. a) Outdoor, unprotected

The component is fully exposed to direct rain, sun, wind, dust, fungus, ice, radiation to the cold night sky, etc.

b) Outdoor, protected

The component is partially covered to protect it from direct rain, sun, wind-blown dust, ice, fungus, and radiation to the cold night sky, etc.

c) Indoor, unconditioned

The component is fully covered by a building or enclosure to protect it from direct rain, sun, wind-blown dust, fungus, and radiation to the cold night sky, etc, but the building or enclosure is not conditioned in terms of temperature, humidity or air filtration. d) Indoor, conditioned

The component is fully covered by a building or enclosure to fully protect it from rain, sun, wind-blown dust, fungus, and radiation to the cold night sky, etc, and the building or enclosure is generally conditioned in terms of temperature, humidity and air filtration. The test conditions for these different services are summarized in Table 1. 6.2 Test sequence The components shall be divided into three groups and subjected to the qualification test sequences in Table 1, carried out in the order laid down. Each box refers to the corresponding subclause in this standard. Test procedures and severities, including initial and final measurements where necessary, are detailed in Clause 11 and summarised in Table 1. Three groups of components shall first be subjected to basic environmental testing, after which a damp heat, cyclic test (see 11.15) shall be done. After each basic environmental test, a visual inspection (VI), a functioning test (FT) and an insulation test (IT) shall be done. All groups/pieces shall be subjected to their individual functioning test before and after each qualification test. Table 1 contains a summary of test levels. For electronic equipment all tests apply. For batteries certain tests do not apply, a summary can also be found in Table 1. NOTE 1 Where the final measurements

...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.