Document ID: chunk:federal_register_of_legislation:F2023C00165:reg:6:p6
Version: federal_register_of_legislation:F2023C00165
Segment Type: reg
Provision Reference: reg 6 (pt 6/9)
Character Range: 249229–253332

1.0

Test procedures and requirements.

           1. The filament lamp is placed in a holder capable of being rotated about its axis and having either a calibrated scale or fixed stops corresponding to the angular displacement tolerance limits. The holder is then so rotated that an end view of the filament is seen on the screen on to which the image of the filament is projected. The end view of the filament shall be obtained within the angular displacements tolerance limits.

             2. Side elevation

The filament lamp placed with the cap down, the reference axis vertical and the filament seen end-on, the projection of the filament shall lie entirely within a rectangle of height "a" and width "b", having its centre at the theoretical position of the centre of the filament.

           3.                                                        Front elevation

The filament lamp placed with the cap down and the reference axis vertical, the filament lamp being viewed in a direction at right angles to the filament axis:
3.1 The projection of the filament shall lie entirely within a rectangle of height "a" and width "h", having its centre at the theoretical position of the centre of the filament.
3.2 The centre of the filament shall not be offset by more than distance "k" from the reference axis.

CATEGORY H12

Sheet H12/1
The drawings are only to illustrate the essential dimensions of the filament lamp

          1/ The reference plane is the plane defined by the meeting points of the
              cap-holder fit.
             2/ The reference axis is perpendicular to the reference plane and concentric with the reference diameter of the cap.
             3/ Glass bulb and supports shall not exceed the envelope and shall not interfere with insertion past the lamp key. The envelope is concentric to the reference axis.
          4/ The keyway is mandatory.
          5/ The filament lamp shall be rotated in the measuring holder until the
              reference lug contacts plane C of the holder.
          6/ Glass bulb periphery shall be optically distortion-free axially within the
              angles gamma1 and gamma2. This requirement applies to the whole bulb circumference within the angles gamma1 and gamma2.
          7/ The obscuration shall extend to at least angle gamma3 and shall be at
              least as far as the undistorted part of the bulb defined by angle gamma1.

CATEGORY H12

Sheet H12/2

Dimensions in mm 8/                                          Tolerances

                                                             Filament lamps of normal   Standard filament lamp
                                                             production
 e 9/                                                        31.5                                11                +/- 0.16
10/                                                          5.5                                 /                 +/- 0.16
f 9/                                                                                             11
10/                                                          0                                   /                 +/- 0.15 12/
h1, h2, h3, h4                                                                                   11
 k                                                           0                                   /                 +/- 0.15 13/
                                                                                                 11
                                                                                                 /
 gamma1                                                      50degrees
                                                             min.

 gamma2                                                      52degrees
                                                             min.
 gamma3                                                      45degrees                  +/- 5 degrees              +/- 5 degrees

Cap PZ20d in accordance with IEC Publ. 61 (sheet 7004-31-2)
ELECTRICAL AND