EN 50156-1:2004
(Main)Electrical equipment for furnaces and ancillary equipment - Part 1: Requirements for application design and installation
Electrical equipment for furnaces and ancillary equipment - Part 1: Requirements for application design and installation
This standard applies to the application design and installation of electrical equipment, control circuits and protective systems for furnaces which are operated with solid, liquid or gaseous fuels and their ancillary equipment. It specifies requirements to meet the operating conditions of furnaces, to reduce the hazards of combustion and to protect the heated systems from damage e.g. by overheating. Such furnaces and the electrical equipment may be part of the following plants for example: a) Water heating systems b) Steam boiler installations (steam and hot-water boilers) and heat recovery steam boilers NOTE 1 The requirements of this standard apply according to the electrical equipment of electrically heated steam boilers. NOTE 2 Seagoing vessels and offshore facilities are governed by International Maritime Law and as such are not within the scope of this standard. These requirements may be used for such facilities. c) Warm air heaters d) Hot-gas heaters e) Heat exchanger systems f) Combustion chambers of stationary turbines g) As long as no other standard is applicable for combined heat and power stations it is recommended to use the requirements of this standard h) This standard may also be used as reference for electrical equipment requirements for thermo-processing equipment. NOTE 3 The requirements of this standard are applicable in all cases where an equipment specific standard does not specify a requirement. The requirements in this standard are not applicable to electrical equipment for: i) Non electrically heated appliances and burner control systems for household and similar purpose; j) Furnaces using technologies for the direct conversion of heat into electrical energy; k) Combustion chambers of non-stationary prime movers and turbines; l) Central oil supply systems for individual heating appliances; m) Furnaces using solid fuels for heating purposes for household use with a nominal thermal output up to 1 MW; n) Furnaces which are used to heat process fluids and gasses in chemical plant. This standard may be used as a basis for the requirements placed on electrical equipment for furnaces which are excluded from its field of application.
Elektrische Ausrüstung von Feuerungsanlagen - Teil 1: Bestimmungen für die Anwendungsplanung und Errichtung
Diese Norm gilt für die Anwendungsplanung und Errichtung von elektrischer Ausrüstung, Leittechnik und Sicherheitssystemen für Feuerungen, die mit festen, flüssigen oder gasförmigen Brennstoffen betrieben werden und ihren Nebenanlagen. Sie legt Anforderungen dafür fest, die Betriebsbedingungen in Feuerungs-anlagen zu erfüllen, die Risiken der Verbrennung zu reduzieren, und die beheizten Systeme vor Schäden z. B. durch Überhitzung zu schützen. Solche Feuerungsanlagen und die elektrische Ausrüstung können z. B. Bestandteil von folgenden Anlagen sein: a) Wasserheizungsanlagen b) Dampfkesselanlagen (Dampf- und Heißwasserkessel) und Abhitzekessel ANMERKUNG 1 Die Anforderungen dieser Norm gelten entsprechend für die elektrische Ausrüstung von elektrisch beheizten Dampfkesseln. ANMERKUNG 2 Hochseeschiffe und meerestechnische Einrichtungen sind durch das internationale Meeresgesetz geregelt und als solche nicht im Anwendungsbereich dieser Norm. Die Anforderungen können für solche Einrichtungen angewandt werden. c) Warmlufterzeuger d) Heißgaserzeuger e) Wärmeübertragungsanlagen f) Brennkammern von stationären Turbinen g) Solange keine anderen Normen für Anlagen der Kraftwärmekopplung anwendbar sind, wird empfohlen, die Anforderungen dieser Norm zu benutzen. h) Diese Norm kann als Referenz für die Anforderungen an die elektrische Ausrüstung von Thermo-prozessanlagen herangezogen werden. ANMERKUNG 3 Die Bestimmungen dieser Norm sind in all jenen Fällen anwendbar, in denen entsprechende Anforderungen durch eine anlagenspezifische Norm nicht festgelegt sind. Die Festlegungen dieser Norm sind nicht anwendbar für die elektrische Ausrüstung von: i) Nicht elektrisch beheizten Wärmegeräten und Brennersteuerungen für den Hausgebrauch und ähnliche Zwecke j) Feuerungsanlagen, die Technologien zur direkten Umwandlung von Wärme in elektrische Energie anwenden k) Brennkammern von nicht stationären Triebwerken und Turbinen l) Zentrale Ölversorgungsanlagen für Einzelöfen m) Feuerungsanlagen für feste Brennstoffe zu Heizzwecken für den Hausgebrauch mit einer Nenn-wärmeleistung bis 1 MW. n) Feuerungsanlagen, die dazu benutzt werden, Flüssigkeiten und Gase für Prozesse in chemischen Anlagen zu erhitzen. Diese Norm kann als Grundlage für Anforderungen benutzt werden, die an die elektrische Ausrüstung solcher Feuerungsanlagen gestellt werden, die aus ihren Anwendungsbereich ausgeschlossen sind.
Equipements électriques d'installation de chaudière - Partie 1: Règles pour la conception, pour l'application et l'installation
La présente norme s'applique à la conception d'application et à l'installation du matériel électrique, des circuits de commande et des systèmes de protection des fours utilisés avec des combustibles solides, liquides ou gazeux et leurs équipements auxiliaires. Elle spécifie les prescriptions pour satisfaire aux conditions de fonctionnement des fours, pour réduire les dangers de combustion et pour protéger les systèmes chauffés contre des dégâts par exemple de surchauffe. Ces fours et le matériel électrique peuvent faire partie des installations suivantes, par exemple: a) Systèmes de chauffage à eau; b) Installations de chaudière à vapeur (chaudières à vapeur et à eau chaude) et chaudières à vapeur à récupération de chaleur; NOTE 1 Les prescriptions de la présente norme s'appliquent en conséquence au matériel électrique de chaudières à vapeur chauffées électriquement. NOTE 2 Les navires de haute mer et les installations en mer sont régis par le droit maritime international et, de ce fait, ne sont pas couverts par le domaine d'application de la présente norme. Ces prescriptions peuvent être utilisées pour ces installations. c) Réchauffeurs à air chaud; d) Réchauffeurs à gaz chaud; e) Systèmes d'échangeur de chaleur; f) Chambres de combustion de turbines fixes; g) Il est recommandé d'utiliser les prescriptions de la présente norme pour autant qu'aucune autre norme ne s'applique aux centrales électriques et thermiques combinées; h) La présente norme peut également être utilisée en tant que référence pour les prescriptions de matériel électrique de l'équipement de thermotraitement; NOTE 3 Les prescriptions de la présente norme s'appliquent à tous les cas où une norme spécifique à un matériel ne spécifie pas de prescription. Les prescriptions de la présente norme ne s'appliquent pas au matériel électrique suivant: i) Appareils non chauffés électriquement et systèmes de commande de brûleur pour applications domestiques et analogues; j) Fours utilisant des technologies de conversion directe de chaleur en énergie électrique; k) Chambres de combustion de moteurs d’entraînement et de turbines non fixes; l) Systèmes d'alimentation d'huile centraux pour appareils de chauffage individuels; m) Fours utilisant des combustibles solides aux fins de chauffage pour usages domestiques de puissance thermique nominale jusqu'à 1 MW; n) Fours utilisés pour chauffer des fluides et gaz de traitement dans des installations chimiques. La présente norme peut être utilisée en tant que base pour les prescriptions concernant le matériel électrique des fours exclus de son champ d'application.
Električna oprema za peči in pomožno opremo – 1. del: Zahteve za zasnovo in inštalacijo naprave
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STANDARDElektrična oprema za peči in pomožno opremo – 1. del: Zahteve za zasnovo in inštalacijo napraveElectrical equipment for furnaces and ancillary equipment - Part 1: Requirements for application design and installation©
Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljenoReferenčna številkaSIST EN 50156-1:2006(en)ICS27.060.01
EUROPEAN STANDARD
EN 50156-1 NORME EUROPÉENNE EUROPÄISCHE NORM
October 2004 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
© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50156-1:2004 E
ICS 27.060.01
English version
Electrical equipment for furnaces and ancillary equipment Part 1: Requirements for application design and installation
Equipements électriques d'installation
de chaudière Partie 1: Règles pour la conception,
pour l'application et l'installation
Elektrische Ausrüstung
von Feuerungsanlagen Teil 1: Bestimmungen für die Anwendungsplanung und Errichtung
This European Standard was approved by CENELEC on 2004-04-01. 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.
Foreword This European Standard has been prepared by the German National Committee with the participation of experts of other National Committees on the basis of CLC/BT(DE/NOT)140.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50156-1 on 2004-04-01. 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)
2005-04-01 - latest date by which the national standards
conflicting with the EN have to be withdrawn
(dow)
2007-04-01 The following further parts of this standard are under consideration: Part 2: Requirements for design, development and type approval of safety-relevant equipment Part 3: Requirements for plant-specific tests of safety-relevant equipment This type B standard (CEN/TC 114 terminology) is based on the IEC Standard 61508 Functional safety – Safety-related systems, Parts 1 to 7 as a basic safety standard. This standard shall serve as a basis for requirements on electrical equipment of boilers to be referenced in standards to be developed by CEN/TC 269. ________
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Contents
Introduction.5 1 Scope.7 2 Normative references.7 3 Definitions.9 4 General requirements.17 4.1 General considerations.17 4.2 Environmental requirements.18 4.3 Power supply.19 5 Incoming supply connections and devices for disconnecting and emergency stop.20 5.1 Incoming supply and equipment connections.20 5.2 Devices for disconnecting power supplies.22 5.3 Emergency stop.23 6 Protection against electric shock.24 6.1 Protection against direct contact.24 6.2 Protection against indirect contact.24 7 Environmental protection of the equipment.25 7.1 Protection against ingress of solid foreign bodies.25 7.2 Protection against water.25 8 Equipotential bonding.25 8.1 General.25 8.2 Equipotential bonding as a protective measure in case of indirect contact.25 8.3 Equipotential bonding for purpose of lightning protection.26 8.4 Functional equipotential bonding.26 9 Auxiliary circuits.26 9.1 Supply to auxiliary circuits.26 9.2 Voltage for auxiliary circuits.27 9.3 Connection to the protective conductor.28 9.4 Overcurrent protection of auxiliary circuits.28 9.5 Measures to prevent danger from short circuits to exposed conductive Parts or earth.29 9.6 Influence of capacitance and leakage resistance.29 10 Additional requirements for the application of protective system.30 10.1 General safety requirements.30 10.2 Concept and scope definition.33 10.3 Hazard and risk analysis.34 10.4 Safety requirements allocation.36 10.5 Design.37 10.6 Installation and commissioning.50 10.7 Safety validation.50
10.8 Operation and maintenance.53 10.9 Modification and retrofit.53 11 Electrical equipment.53 11.1 General requirements.53 11.2 Creepage distances and clearances.54 11.3 Motors.54 11.4 Transformers.54 11.5 Switching devices.55 11.6 Operator control devices.55 11.7 Immersion electrodes.55 11.8 Trace heating systems.55 12 Cables and cords.55 12.1 General requirements.55 12.2 Insulation.56 12.3 Current carrying capacity.56 12.4 Conductors of separate circuits.56 13 Warning signs and item designation.57 13.1 Name plates, markings and identifications plates.57 13.2 Warning signs.57 13.3 Functional identification.57 13.4 Marking of electrical equipment.57 13.5 Item designations.57 14 Technical documentation.58 14.1 Documentation describing functions and connections.58 14.2 Documents for type approved components.59 14.3 Documentation of the applications software.59 Annex A (informative)
Fault models of microelectronic components.60 Annex B (informative)
Configurations of programmable safety devices (PSD) with reference to
EN 61508.63 Annex C (informative)
Life cycle of programmable safety device of protective equipment.70 Annex D (informative)
Management of functional safety.71 Bibliography.72
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Introduction This part of the European Standard EN 50156 specifies the requirements and recommendations for the application design and installation of electrical and control equipment for furnaces and ancillary equipment and for the systems heated by the thermal energy released in the furnace to ensure: – safety of personnel, property and the environment; – consistency of proper function; – ease and economy of maintenance. The operating conditions of the furnace, the hazards of combustion and the safety of heated systems are considered. A protective system consisting of safety devices for – monitoring of flames and other safety conditions of the firing; – interrupting the flow of fuel to the furnace; – ventilating the body of the furnace and the flue gas ducts; – monitoring of safety condition of the heated systems (e.g. water level limiter in steam boilers) may be necessary to ensure proper ignition and combustion of fuel and to avoid the development, existence and/or ignition of explosive mixture of fuel and air, and also to avoid damage of the heated systems (see 3.25). The rating of necessary safety integrity levels is based on standard EN 61508-1. The requirements for protective system(s) for boilers have been coordinated with CEN/TC 269. Figure 1 is provided as an aid to understanding the relationship between the various elements of furnaces and their ancillary equipment, the heated systems, the control system and the protective system(s). The following further parts of this Standard are under consideration: Part 2: Requirements for design, development and type approval of safety-relevant equipment Part 3: Requirements for plant-specific tests of safety-relevant equipment
Figure 1 – Example of the functionality of a furnace with ancillary equipment, heated systems and relationship to control system and protective equipment.
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