BS EN 50156-1:2015 – TC:2020 Edition
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Tracked Changes. Electrical equipment for furnaces and ancillary equipment – Requirements for application design and installation
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 174 |
This European Standard applies to the application design and installation of electrical equipment, control circuits and safety-related 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 by way of example of the following plant: 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, we recommend the use of the requirements of this standard; h) This standard may also be used as reference for electrical equipment requirements for thermo-processing equipment. 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 purposes; 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 European Standard may be used as a basis for the requirements placed on electrical equipment for furnaces, which are excluded from its field of application.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 105 | 1 Scope |
| 106 | 2 Normative references |
| 107 | 3 Terms and definitions |
| 115 | 4 General requirements 4.1 General considerations |
| 116 | 4.2 Environmental requirements 4.2.1 General 4.2.2 Environmental and operating conditions 4.2.3 Electromagnetic compatibility 4.2.3.1 Electromagnetic compatibility – Emission requirements |
| 117 | 4.2.3.2 Electromagnetic compatibility – Immunity requirements 4.2.3.3 Performance criteria 4.2.4 Ambient temperature 4.2.5 Humidity |
| 118 | 4.2.6 Contamination 4.2.7 Vibration and shock 4.2.8 Equipment used in flammable atmospheres 4.3 Power supply 4.3.1 General 4.3.2 Power stations 5 Incoming supply connections and devices for disconnecting and emergency stop 5.1 Incoming supply and equipment connections 5.1.1 Types of connection |
| 119 | 5.1.2 Terminations 5.1.2.1 General 5.1.2.2 Incoming supply terminals 5.1.2.3 Connections to remote electrical equipment |
| 120 | 5.2 Devices for disconnecting power supplies 5.2.1 General |
| 121 | 5.2.2 Disconnecting switch 5.2.3 Excluded circuits |
| 122 | 5.3 Emergency stop 5.3.1 General 5.3.2 Emergency stop device for furnaces in heating installations 5.3.3 Emergency stop device for other furnaces, e.g. steam boilers 5.3.4 Application as isolating switch 6 Protection against electric shock 6.1 Protection against direct contact |
| 123 | 6.2 Protection against indirect contact 7 Environmental protection of the equipment 7.1 Protection against ingress of solid foreign bodies 7.2 Protection against water 8 Equipotential bonding 8.1 General 8.2 Equipotential bonding as a protective measure in case of indirect contact |
| 124 | 8.3 Equipotential bonding for the purpose of lightning protection 8.4 Functional equipotential bonding |
| 125 | 9 Auxiliary circuits 9.1 Supply to auxiliary circuits 9.1.1 Supply from 3-phase or a.c. systems 9.1.2 Supply from d.c. mains 9.1.2.1 General 9.1.2.2 Supply from more than one d.c. source |
| 126 | 9.1.2.3 Supply from a d.c. source with an mid-point conductor 9.1.2.4 Supply from an isolated d.c. source 9.1.3 Auxiliary circuits connected between the line conductors 9.2 Voltage for auxiliary circuits 9.2.1 Operating voltage of auxiliary circuits 9.2.2 Preferred nominal voltages 9.3 Connection to the protective conductor 9.4 Overcurrent protection of auxiliary circuits 9.4.1 Rating of overcurrent protective devices |
| 127 | 9.4.2 Overcurrent protection of auxiliary circuits connected to the protective conductor 9.4.3 Overcurrent protection of auxiliary circuit with the middle conductor connected to the protective conductor 9.4.4 Overcurrent protection of auxiliary circuits with no electrical connection to the protective conductor 9.4.5 Overcurrent protection of control system supply transformers 9.4.6 Rating and setting of overcurrent protection 9.5 Measures to prevent danger from short circuits to exposed conductive parts or earth |
| 128 | 9.6 Influence of capacitance and leakage resistance 10 Additional requirements for the application of a safety-related system 10.1 General safety requirements 10.1.1 Safety lifecycle requirements for a safety-related system |
| 130 | 10.1.2 Planning 10.1.2.1 General 10.1.2.2 Operation and maintenance planning |
| 131 | 10.1.2.3 Validation planning |
| 132 | 10.1.2.4 Installation and commissioning planning |
| 133 | 10.2 Concept and scope definition |
| 134 | 10.3 Hazard and risk analysis |
| 135 | 10.4 Safety requirements allocation |
| 136 | 10.5 Design 10.5.1 General requirements |
| 137 | 10.5.2 Design of the safety-related system |
| 142 | 10.5.3 Measures to avoid faults |
| 143 | 10.5.4 Consideration of times 10.5.5 Hardware design 10.5.5.1 General requirements of the hardware 10.5.5.2 Hard-wired section of the safety-related system |
| 145 | 10.5.5.3 Fault exclusions |
| 148 | 10.5.5.4 Additional requirements for circuit breakers 10.5.6 Plant specific application software 10.5.6.1 General 10.5.6.2 Requirements for plant-specific application software |
| 150 | 10.5.6.3 Requirements for design 10.5.6.4 Measures for avoiding faults |
| 151 | 10.5.6.5 Code implementation 10.6 Installation and commissioning 10.7 Safety validation 10.7.1 System integration of hardware and software |
| 152 | 10.7.2 Fault assessment for the system integration of hardware and software |
| 153 | 10.7.3 Type approval 10.7.4 Plant-specific test 10.8 Operation and maintenance |
| 154 | 10.9 Modification and retrofit 10.9.1 General 10.9.2 Measures against unauthorised changes or overriding |
| 155 | 11 Electrical equipment 11.1 General requirements 11.2 Creepage distances and clearances 11.3 Motors 11.4 Transformers |
| 156 | 11.5 Switching devices 11.6 Operator control devices 11.7 Immersion electrodes 11.8 Trace heating systems 12 Cables and cords 12.1 General requirements |
| 157 | 12.2 Insulation 12.3 Current-carrying capacity 12.4 Conductors of separate circuits |
| 158 | 13 Warning signs and item designation 13.1 Warning signs 13.2 Functional identification 13.3 Item designations 14 Technical documentation 14.1 General |
| 159 | 14.2 Documentation describing functions and connections 14.2.1 General 14.2.2 Documentation describing functions 14.2.3 Documentation describing connections 14.2.4 Documentation describing the process 14.2.5 Documentation of the risk assessment |
| 160 | 14.3 Documents for type approved components 14.4 Documentation of the application software |
| 161 | Annex A (informative)Configurations of programmable safety devices (PSD) with reference to EN 61508 A.1 General |
| 162 | A.2 Configuration 1oo1 A.3 Configuration 1oo1D |
| 163 | A.4 Configuration 1oo2 |
| 164 | A.5 Configuration 1oo2D |
| 165 | A.6 Configuration 2oo3 |
| 166 | A.7 Configuration 2oo3D |
| 168 | Annex B (informative)Lifecycle of programmable safety device |
| 169 | Annex C (informative)Management of functional safety |
| 170 | Annex D (informative)Examples of determining the safety integrity level SIL using the risk graph method D.1 General D.2 Risk parameter C (Consequences of the hazardous event) D.3 Risk parameter F (Frequence and duration of the time spent in the hazard area) D.4 Risk parameter P (Possibility of preventing the hazardous event) D.5 Risk parameter W (Likelihood of occurrence of the hazardous event) |
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BS EN 50156-1:2015
Electrical equipment for furnaces and ancillary equipment – Requirements for application design and installation Published…
