BS EN 13201-3:2015:2016 Edition
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Road lighting – Calculation of performance
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 68 |
This European Standard specifies the conventions and mathematical procedures to be adopted in calculating the photometric performance of road lighting installations designed in accordance with the parameters described in EN 13201‑2 to ensure that every lighting calculation is based on the same mathematical principles.
The design procedure of a lighting installation also requires the knowledge of the parameters involved in the described model, their tolerances and variability. These aspects are not considered in this part of EN 13201 but a procedure to analyse their contribution in the expected results is suggested in EN 13201‑4 and it can also be used in the design phase.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | European foreword |
| 7 | Introduction |
| 8 | 1 Scope 2 Normative references 3 Terminology 3.1 Terms and definitions |
| 11 | 3.2 List of symbols and abbreviations |
| 13 | 4 Mathematical conventions 4.1 General |
| 14 | 4.2 Decimal places of the requirements 5 Photometric data 5.1 General 5.2 The I-table 5.2.1 System of coordinates and advised angular intervals of the I-table |
| 16 | 5.2.2 Linear interpolation in the I-table |
| 18 | 5.3 The r-table 5.3.1 The r-table format |
| 21 | 5.3.2 Linear interpolation in the r-table 6 Calculation of I(C, γ) 6.1 General 6.2 Mathematical conventions for distances measured on the road |
| 22 | 6.3 Mathematical conventions for rotations |
| 24 | 6.4 Calculation of C and γ 6.4.1 Calculation of x′, y′ and H′: |
| 25 | 6.4.2 Evaluation of installation azimuth φ. 6.4.3 Calculation of C 6.4.4 Calculation of y |
| 26 | 7 Calculation of photometric quantities 7.1 Luminance 7.1.1 Luminance at a point 7.1.1.1 General formula 7.1.1.2 Calculation of tan ε and β |
| 27 | 7.1.2 Field of calculation for luminance |
| 28 | 7.1.3 Position of calculation points |
| 29 | 7.1.4 Position of observer |
| 31 | 7.1.5 Luminaires included in calculation 7.2 Illuminance 7.2.1 General |
| 32 | 7.2.2 Horizontal illuminance at a point 7.2.3 Hemispherical illuminance at a point |
| 33 | 7.2.4 Semi-cylindrical illuminance at a point |
| 34 | 7.2.5 Vertical illuminance at a point |
| 35 | 7.2.6 Field of calculation for illuminance 7.2.7 Position of calculation points |
| 36 | 7.2.8 Luminaires included in calculation |
| 37 | 7.2.9 Illuminance on areas of irregular shape 8 Calculation of quality characteristics 8.1 General 8.2 Average luminance 8.3 Overall uniformity 8.4 Longitudinal uniformity |
| 38 | 8.5 Threshold increment fTI 8.5.1 Definition and conventional hypotheses |
| 40 | 8.5.2 Threshold Increment calculation process |
| 41 | 8.5.3 Threshold increment calculation for C and P lighting classes 8.6 Edge Illuminance Ratio REI |
| 43 | 9 Ancillary data |
| 45 | Annex A (informative) Mathematical information technology conventions and flow chart diagrams A.1 Mathematical and Information Technology conventions used in addition to Clause 4 to define the variables used in the following logical flow charts of the lighting calculation program |
| 49 | A.2 Linear interpolation in the tables |
| 51 | A.3 Information Technology requirements |
| 63 | Annex B (informative) Extended r-table format for low mounting height luminaire |
| 65 | Bibliography |
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