Specifications
16 Philips Fortimo HBMt Gen 3 System Design In Guide
Thermal specications
To ensure the optimal performance and life time of the system. The following
conditions have to meet:
• Maximum Tcase ≤ 85° C at maximum rated luminaire ambient temperature
• T (Tcase - Tmax. amb) ≤ 50° C (Maximum allowed difference between case and
rated luminaire ambient temperature)
Table 17. Determining maximum Tcase for an application
Outdoor applications, Tmax.amb = 40° C
When the maximum outdoor ambient (Tmax.amb) is 40° C, the luminaire
design needs to ensure that
• Module temperature does not exceed 85° C when tested in a lab environment at
40° C ambient
• ∆T must not exceed 45° C
Indoor applications, Tmax.amb = 30° C
When the maximum indoor ambient (Tmax.amb) is 30° C, the luminaire design
needs to ensure that
• Module temperature does not exceed 80° C when tested in a lab environment at
30 °C ambient
• ∆T must never exceed 50° C
High Bay or Industrial applications, Tmax.amb = 55 °C
If the given luminaire operates under indoor conditions (e.g. high-bay or
industrial application Tmax. amb is rated for 55° C), the luminaire design needs
to ensure that
• Module temperature does not exceed 85° C when tested in a lab environment at
55° C ambient
• ∆T must never exceed 30° C
Maximum rated luminaire
ambient temperature
Maximum
∆T (Tcase –Tamb)
Maximum Tcase
40˚ C 45˚ C 85˚ C
55˚ C 30˚ C 85˚ C
30˚ C 50˚ C 80˚ C