Design-in guide - Philips Lighting

Electrical design
Wiring
The mains supply cale must be connected to the lampholder.
The earth connector needs to be connected to the heatsink/luminaire because the
Fortimo LED Twistable Downlight Module Gen 2 is specified as class I.
The lampholder is screwed with 3x M3 metal screws to the heatsink.
In an assembly scenario where metal screws are not used to fix the heat sink to the
module, then a non-isolated thermal interface material (also known as electrically
conductive TIMs) must be used to ensure proper grounding.
Length of mains cable
The length of the mains supply cable from the module is approximately 25 cm. The
length of the extension cable outside of the luminaire is not specified.
Starting characteristics
The system can be switched on in milliseconds, which is a general characteristic
of LED based systems. Unlike conventional CFL’s, there is no observable
start up time.
Low and overvoltage
The modules can withstand a voltage fluctuation of +/- 10% with no safety
issue and no abnormal early failures.
Inrush current
The current that flows during the very first few milliseconds when switching on a
luminaire or an entire lighting installation is called the inrush current. This current
is very important when making the right choice of switch gear and fusing, e.g. circuit
breakers, miniature circuit breakers (MCB). The inrush current is determined in part by
the circuitry in use and in part by the properties of the mains supply, viz. the mainssupply
impedance and the supply-cable resistance. The moment of switching in relation
to the sine wave of the supply voltage also determines the value of the inrush current.
The highest inrush current is when the driver is connected to the mains at the peak of
the mains voltage.
22 Design In Guide Philips Fortimo LED Twistable Downlight Module Gen 2