CWA 14642:2003

CEN Workshop Agreement (CWA) - Electrical interface for domestic cogeneration - Requirements for distribution network connection for micro cogeneration systems for domestic use up to 16 A per phase in low-voltage distribution networks (230/400 V)

Micro-cogeneration is the generation of electricity and the recovery and use of the thermal energy
supplying the needs of domestic premises. This CEN Workshop Agreement covers the electrical
interface between the appliance and the low-voltage electrical network (nominal 230/400 V). Specific
elements like metering are not included. The intention of the CWA is to recommend future good
practice, noting that the CWA, local existing standards and practices may require modification in the
future due to larger market penetration and the associated return of experience.
NOTE The CWA reflects a pan-European view on best practice for the connection of micro-cogeneration; however it may not
be the most appropriate document for use in all countries and under all circumstances.
The following aspects are included in the scope:
· all technologies for micro-cogeneration are applicable;
· all generator types are applicable;
· the size is limited to a maximum of 16A per phase in a single low-voltage
installation (nominal 230/400V)
· both 3-phase and single-phase connections are applicable;
· connection is limited to low voltage networks;
· 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;
· this document relates to the electrical interface only as existing standards and
directives apply to the other parts of the system;
· this document covers technical issues of connection.
NOTE The size is maybe increased up to 20 A (24 A) in accordance to the existing national standards in Germany, Austria,

Dogovor delavnice CEN (CWA) – Električni vmesnik za hišno soproizvodnjo – Zahteve za povezave razdelilnega omrežja za mikro soproizvodne sisteme za domačo uporabo do 16 A na fazo v nizkonapetostnem razdelilnem omrežju (230/400 V)

General Information

• Status: Withdrawn
• Publication Date: 21-Jan-2003
• ICS: 27.010 - Energy and heat transfer engineering in general
• Technical Committee: CEN/WS 005 - Domestic Micro-Cogeneration
• Drafting Committee: CEN/WS 005 - Domestic Micro-Cogeneration
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 21-Dec-2007
• Completion Date: 21-Dec-2007
• Ref Project: SIST CWA 14642:2004 - CEN Workshop Agreement (CWA) - Electrical interface for domestic cogeneration - Requirements for distribution network connection for micro cogeneration systems for domestic use up to 16 A per phase in low-voltage distribution networks (230/400 V)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST CWA 14642:2004
01-november-2004
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=DKWHYH]DSRYH]DYHUD]GHOLOQHJDRPUHåMD]DPLNURVRSURL]YRGQHVLVWHPH]D
GRPDþRXSRUDERGR$QDID]RYQL]NRQDSHWRVWQHPUD]GHOLOQHPRPUHåMX
9
CEN Workshop Agreement (CWA) - Electrical interface for domestic cogeneration -
Requirements for distribution network connection for micro cogeneration systems for
domestic use up to 16 A per phase in low-voltage distribution networks (230/400 V)
Ta slovenski standard je istoveten z: CWA 14642:2003
ICS:
27.010 Prenos energije in toplote na Energy and heat transfer
splošno engineering in general
SIST CWA 14642:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST CWA 14642:2004

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SIST CWA 14642:2004
CEN
CWA 14642
WORKSHOP
January 2003
AGREEMENT
ICS 27.010
English version
CEN Workshop Agreement (CWA) - Electrical interface for domestic
cogeneration - Requirements for distribution network connection for
micro cogeneration systems for domestic use up to 16 A per phase in
low-voltage distribution networks (230/400 V)
This CEN Workshop Agreement has been drafted and approved by a Workshop of representatives of interested parties, the constitution of
which is indicated in the foreword of this Workshop Agreement.
The formal process followed by the Workshop in the development of this Workshop Agreement has been endorsed by the National
Members of CEN but neither the National Members of CEN nor the CEN Management Centre can be held accountable for the technical
content of this CEN Workshop Agreement or possible conflicts with standards or legislation.
This CEN Workshop Agreement can in no way be held as being an official standard developed by CEN and its Members.
This CEN Workshop Agreement is publicly available as a reference document from the CEN Members National Standard Bodies.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.
Ref. No. CWA 14642:2003  E

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SIST CWA 14642:2004
CWA 14642:2003 (E)
Content
1 Scope . 7
2 References. 8
3 Terms and definitions. 9
4 Safety requirements . 13
4.1 General . 13
4.1.1 The electrical installation. 13
4.1.2 Electrical equipment. 14
4.2 Connection of the appliance . 14
4.3 Connection of multiple micro-cogeneration appliances . 14
4.4 Protection functions of the electrical interface . 14
4.4.1 Over-/Under-frequency . 15
4.4.2 Over-/Under-voltage . 15
4.4.3 Over-current protection . 16
4.4.4 Other protection criteria . 16
4.5 Earthing. 17
4.6 Residual current protection. 17
4.7 Re-connection of the appliance . 17
4.8 Synchronisation. 17
5 Power quality.
...