BS-EN-50438-2007.pdf
BRITISH STANDARD BS EN 50438:2007 Requirements for the connection of micro-generators in parallel with public low-voltage distribution networks ICS 29.160.20 ? Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:50:50 GMT+00:00 2008, Uncontrolled Copy, (c) BSI BS EN 50438:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2008 © BSI 2008 ISBN 978 0 580 54535 1 National foreword This British Standard is the UK implementation of EN 50438:2007. The UK participation in its preparation was entrusted to Technical Committee GEL/8, Systems aspects for electrical energy supply. A list of organizations represented on this committee can be obtained on request to its secretary. For a micro-generator which is designed to operate in parallel with a DSOs Network but which is connected via an inverter (e.g. a PV array or fuel cell), 4.1.3 permits the connection of one pole of the DC side of the inverter to the DSOs Network if the insulation between the AC and the DC sides of the inverter meets the requirements of over voltage category IV as specified in EN 60664-1. The UK committee draws the attention of users to its interpretation of this requirement. It is the opinion of the UK committee that there is a need for the insulation between the AC and DC sides of the inverter to satisfy the requirements for simple separation. The requirements for simple separation are those given in 5.3.3 of BS EN 60664-1 for basic insulation. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publication DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:50:50 GMT+00:00 2008, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 50438 NORME EUROPÉENNE EUROPÄISCHE NORM December 2007 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 © 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50438:2007 E ICS 29.160.20 English version Requirements for the connection of micro-generators in parallel with public low-voltage distribution networks Prescriptions pour le raccordement de micro-générateurs en parallèle avec les réseaux publics de distribution à basse tension Anforderungen für den Anschluss von Kleinst-Generatoren an das öffentliche Niederspannungsnetz This European Standard was approved by CENELEC on 2007-09-11. 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, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:50:50 GMT+00:00 2008, Uncontrolled Copy, (c) BSI EN 50438:2007 - 2 - Foreword This European Standard was prepared by WG 2 of the Technical Committee CENELEC TC 8X, System aspects for electrical energy supply. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50438 on 2007-09-11. This European Standard supersedes CWA 14642:2003. 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) 2008-10-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-10-01 _ Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:50:50 GMT+00:00 2008, Uncontrolled Copy, (c) BSI EN 50438:2007 - 3 - Contents 1 Scope. 5 2 Normative references 6 3 Terms and definitions . 7 4 Connection requirements 9 4.1 The electrical installation. 9 4.1.1 Installation instructions 9 4.1.2 Over-current protection. 9 4.1.3 Earthing 9 4.2 Interface protection10 4.2.1 General .10 4.2.2 Interface protection settings.11 4.2.3 Loss of Mains (LoM) protection11 4.2.4 Automatic reconnection after a network outage12 4.2.5 Synchronisation.12 5 Power quality.12 5.1 Electromagnetic emission / immunity12 5.2 DC injection.12 5.3 Power factor 12 6 Operation and safety of the micro-generator 13 6.1 General13 6.2 Safety13 6.3 Information plate13 6.4 Labelling13 6.5 Maintenance and routine testing.14 7 Commissioning14 7.1 General14 7.2 Installation .15 7.3 Notification procedure15 7.3.1 Inform and Fit for a single installation.15 7.3.2 Multiple / planned installation.15 7.4 Decommission arrangements.15 7.5 Replacement arrangements.16 Annex A (normative) Interface protection settings, national deviations17 AT Austria.17 BE Belgium.18 CH Switzerland.20 CY Cyprus21 CZ Czech Republic.22 DE Germany.23 DK Denmark.24 ES Spain 25 FI Finland .27 FR France 28 Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:50:50 GMT+00:00 2008, Uncontrolled Copy, (c) BSI EN 50438:2007 - 4 - GB United Kingdom29 IE Ireland30 IT Italy 31 NL The Netherlands32 NO Norway.33 PL Poland.34 SE Sweden.35 SI Slovenia .36 Annex B (informative) Notification sheets37 B.1 Notification of a micro-generation installation37 B.2 Application for connection of multiple micro-generators39 B.3 Notification of micro-generator decommissioning41 Annex C (informative) Interface protection Compliance type testing general arrangements42 C.1 Compliance testing 42 C.2 Type testing of the interface protection.42 C.3 Type testing.45 Annex D (informative) Type certification test results sheet 46 Annex E (normative) Countries allowing extension of the scope 16 A 50 CY Cyprus50 FI Finland .50 IE Ireland50 Annex F (informative) Abbreviations.51 Annex G (informative) A-deviations 52 Bibliography53 Figure 1 Example of a warning label both for size and content14 Figure C.1 LoM test arrangement.44 Figure C.2 Power factor test arrangement 45 Table 1 Countries allowing or not allowing Inform and Fit. 5 Table 2 Default interface protection settings .11 Table 3 Product family emission standards.12 Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:50:50 GMT+00:00 2008, Uncontrolled Copy, (c) BSI EN 50438:2007 - 5 - 1 Scope This European Standard specifies technical requirements for connection and operation of fixed installed micro-generators and their protection devices, irrespective of the micro-generators primary source of energy, in parallel with public low-voltage distribution networks, where micro-generation refers to equipment rated up to and including 16 A per phase, single or multi phase 230/400 V or multi phase 230 V (phase-to-phase voltage). This European Standard is intended for installation mainly in the domestic market. In some countries this document may be applied to generators with higher ratings used mostly in domestic and small commercial installations. These countries are listed in Annex E. Whenever the scope is extended to equipment rated greater than 16 A per phase additional standards could be applicable. Inform and Fit is the recommended procedure for installation of micro-generation except in those countries where legislation precludes this approach e.g. where it is mandatory for the DNO to give prior permission for the connection. Table 1 Countries allowing or not allowing Inform and Fit Inform and Fit Inform and Fit Code Country Allowed Not allowed Code Country Allowed Not allowed AT Austria x IS Iceland x BE Belgium x IT Italy x CH Switzerland x LT Lithuania x CY Cyprus x LU Luxembourg x CZ Czech Republic x LV Latvia x DE Germany x MT Malta x DK Denmark x NL Netherlands x EE Estonia x NO Norway x ES Spain x PL Poland x FI Finland x PT Portugal x FR France x RO Romania x GB United Kingdom x SI Slovenia x GR Greece x SE Sweden x HU Hungary x SK Slovakia x IE Ireland x The electrical interface is the principal focus and this includes the method of connection, the settings and protection requirements for connection, the operation of the electrical interface under normal conditions, emergency shutdown, distribution network-independent operation, start-up and distribution network synchronisation. The provisions of this European Standard are not intended to ensure by themselves the safety of DNO personnel or their contracted parties. Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:50:50 GMT+00:00 2008, Uncontrolled Copy, (c) BSI EN 50438:2007 - 6 - The intention of this European Standard is to ensure that the micro-generator satisfies appropriate provisions for the requirements of the DNO e.g. the distribution network protection, information to electricians working inside the house, quality of supply. The following aspects are included in the scope: all micro-generation technologies are applicable. The following aspects are excluded from the scope: multiple units that for one installation, in aggregate, exceed 16 A; issues of revenue rebalancing, metering or other commercial matters; generators never to be connected to the supply networks; requirements related to the primary energy source e.g. matters related to gas fired generator units; intended network independent operation. NOTE If independent operation is intended, generally preliminary agreement of the DNO shall be obtained, however this is out of the scope of this document. Specific additional requirements most likely could be applicable. 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. EN 50110 series Operation of electrical installations EN 50160 Voltage characteristics of electricity supplied by public distribution systems EN 60255-6 Electrical relays Part 6 : Measuring relays and protection equipment (IEC 60255-6) EN 60664-1 Insulation coordination for equipment within low-voltage systems Part 1: Principles, requirements and tests (IEC 60664-1) EN 61000-3-2 Electromagnetic compatibility (EMC) Part 3-2: Limits - Limits for harmonic current emissions (equipment input current 16 A per phase) (IEC 61000-3-2) EN 61000-3-3 Electromagnetic compatibility (EMC) Part 3-3: Limits Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current 16 A per phase and not subject to conditional connection (IEC 61000-3-3) EN 61000-6-1 Electromagnetic compatibility (EMC) Part 6-1: Generic standards Immunity for residential, commercial and light-industrial environments (IEC 61000-6-1, mod.) EN 61000-6-3 + A11 2001 2004 Electromagnetic compatibility (EMC) Part 6-3: Generic standards Emission standard for residential, commercial and light-industrial environments (IEC 61000-6-3:1996, mod.) HD 384 / HD 60364 series Electrical installations of buildings (IEC 60364 series, mod.) IEC 60364-5-55 Electrical installations of buildings Part 5-55: Selection and erection of electrical equipment - Other equipment Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:50:50 GMT+00:00 2008, Uncontrolled Copy, (c) BSI EN 50438:2007 - 7 - 3 Terms and definitions 1) For the purposes of this document, the following terms and definitions apply. 3.1 clearance time total duration between the instant when the protection system is initiated and the instant when the cessation of supply to the network or disconnection of the micro-generator takes place 3.2 cease to energize the distribution network termination of the operational state where the micro-generator supplies power to the distribution network 3.3 cogeneration combined heat and power (CHP) combined generation of electricity and heat by an energy conversion system and the concurrent use of the electric and thermal energy from the conversion system NOTE In the context of small-scale generation this concept is sometimes referred to as “domestic CHP”. 3.4 commissioning process of putting into operation a micro-generator, apparatus, equipment, building, or facility in accordance with the manufacturers instruction 3.5 user 2) person with responsibility for the premises in which the micro-generator is installed, normally referred to in other documentation as the customer / consumer / network user 3.6 decommissioning process of removing a micro-generator, apparatus, equipment, building, or facility from operation 3.7 disconnection separation of the active parts of the micro-generator from the network with mechanical contacts providing at least basic insulation NOTE Passive components like filters, auxiliary power supply to the micro-generator and sense lines can remain connected. 3.8 LV distribution network low voltage part of the electric power system used for the transfer of electricity within an area of consumption to consumers 1) Where possible IEC Multilingual Dictionary (on CD) is used. 2) Based on national regulations other terms may apply. Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:50:50 GMT+00:00 2008, Uncontrolled Copy, (c) BSI EN 50438:2007 - 8 - 3.9 distribution network operator (DNO) natural or legal person responsible for operating, ensuring the maintenance of and, if necessary, developing the distribution network in a given area and, when applicable, its interconnections with other systems and for ensuring the long term ability of the system to meet reasonable demands for the distribution of electricity (DNO equals DSO, Distribution System Operator) 3.10 electrical installation assembly of wiring and electrical equipment that is used withi
