Document ID: chunk:federal_register_of_legislation:F2023L01529:body:0:p53
Version: federal_register_of_legislation:F2023L01529
Segment Type: other
Provision Reference: 
Character Range: 147275–150134

four phases
       A–D.

       3.7.1. Phase A: Pre-heating (Figure 1)

       The fuel in the pan shall be ignited at a distance of at least 3 m from the tested-device. After 60 seconds pre-heating, the pan shall be placed under the tested-device. If the size of the pan is too large to be moved without risking liquid spills etc. then the tested-device and test rig can be moved over the pan instead.

       Figure 1

       Phase A: Pre-heating

       3.7.2. Phase B: Direct exposure to flame (Figure 2)

       The tested-device shall be exposed to the flame from the freely burning fuel for 70 seconds.

       Figure 2

       Phase B: Direct exposure to flame

       3.7.3.  Phase C: Indirect exposure to flame (Figure 3)

       As soon as phase B has been completed, the screen shall be placed between the burning pan and the tested-device. The tested-device shall be exposed to this reduced flame for a further 60 seconds.

       Instead of conducting phase C of the test, phase B may at the manufacturer's discretion be continued for an additional 60 seconds.

       However this shall only be permitted where it is demonstrable to the satisfaction of the Technical Service that it will not result in a reduction in the severity of the test.

       Figure 3

       Phase C: Indirect exposure to flame

       3.7.4. Phase D: End of test (Figure 4)

       The burning pan covered with the screen shall be moved back to the position described in phase A. No extinguishing of the tested-device shall be done. After removal of the pan the tested-device shall be observed until such time as the surface temperature of the tested-device has decreased to ambient temperature or has been decreasing for a minimum of 3 hours.

       Figure 4

       Phase D: End of test

Annex 8E - Appendix 1

Dimension and technical data of firebricks

Fire resistance:  (Seger-Kegel) SK 30

Al2O3 content:  30 - 33 per cent

Open porosity (Po): 20 - 22 per cent vol.

Density:   1,900 - 2,000 kg/m3

Effective holed area: 44.18 per cent

Annex 8F

External short circuit protection

       1. Purpose

       The purpose of this test is to verify the performance of the short circuit protection. This functionality, if implemented, shall interrupt or limit the short circuit current to prevent the REESS from any further related severe events caused by short circuit current.

       2. Installations

       This test shall be conducted either with the complete REESS or with related REESS subsystem(s), including the cells and their electrical connections. If the manufacturer chooses to test with related subsystem(s), the manufacturer shall demonstrate that the test result can reasonably represent the performance of the complete REESS with respect to its safety performance under the same conditions. If the electronic management unit for the REESS is