Document ID: chunk:federal_register_of_legislation:F2023C00165:reg:6v:p11
Version: federal_register_of_legislation:F2023C00165
Segment Type: reg
Provision Reference: reg 6V (pt 11/19)
Character Range: 151277–155503

distortion-free within the angles gamma 1 and gamma 2. This requirement applies to the whole bulb circumference within the angles gamma 1 and gamma 2.
    5/ The obscuration shall extend over the whole bulb top including the bulb cylindrical portion up to the intersection with gamma 1.
6/ To be checked by means of a "Box system" . Sheet 27W/3.
    7/ For standard filament lamps, the points to be measured are those where the projection of the outside of the end turns crosses the filament axis.
    8/ The ends of the filament are defined by the intersections of the outsides of the first and of the last light emitting turn, respectively, with the plane parallel to and 31.75mm from the reference plane.
CATEGORIES H27W/1 AND H27W/2

Sheet H27W/3

Screen projection requirements
 This test is used to determine, by checking the correctness of the filament relative to the reference axis and reference plane, whether a filament lamp complies with the requirements.

              View A View B

Reference   a        c        k    g
Dimensions  d + 1.2  d + 1.0  0.5  2.4

 d = actual filament diameter
 The filament shall lie entirely within the limits shown.
 The centre of the filament shall lie within the limits of dimension k.

CATEGORY P27W

Sheet P27W/1

     Dimensions in mm                                            Filament lamps of   Standard
                                                                 normal production   filament

min.                                                             nom.                max.            lamp
e                                                                                    27.93/                      27.9 +/- 0.3

f                                                                                                9.9             9.9                + 0

- 2
Lateral deviation 2/                                                                             3/              0.0 +/- 0.4
beta                                                             75 degrees 3/       90 degrees  105 degrees 3/  90 degrees +/- 5
                                                                                                                 degrees
Cap W2.5x16d in accordance with IEC Publ. 61 (sheet 7004-104-1)
ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS
     Rated values                                                V                   12                          12

W                                                                27                              27
     Test voltage                                                V                   13.5
Objective
values                                                           Watts
                                                                                     W           29.2                               29.2 at
                                                                                                                                    13.5V

+/-                                                              10                              10
%
Luminous
flux                                                             lm                  475

+/-                                                              15
%
Reference luminous flux: 475lm at approx. 13.5V

    1/ The reference axis is defined with respect to the reference keys and is perpendicular to the reference plane.
    2/ Maximum lateral deviation of filament centre from two mutually perpendicular planes both containing the reference axis and one containing axis through reference keys.
3/ To be checked by means of a box system, sheet P27W/2
CATEGORY P27W

Sheet P27W/2

Screen projection requirements
This test is used to determine, by checking whether the filament is correctly positioned relative to the reference axis and the reference plane and has an axis perpendicular, within +/- 15 degrees , to the plane through the centres of the keys and the reference axis, whether a filament lamp complies with the requirements.

            Side elevation Front elevation

Reference  a    b    h     k
Dimension  3.5  3.0  11.9  1.0

 Test procedures and requirements.
      1. The filament lamp is placed in a