Inrush Current - Philips Xitanium LED Xtreme SR Design-In Manual

Ipeak
T (@50%
of Ipeak)
Graphical representation of inrush current
Design-in Guide - Philips Xitanium LED Xtreme SR driver
Xitanium Xtreme LED SR drivers are equipped with an internal fuse
rated for AC & DC voltage operation. Thus, an external DC voltage
rated fuse is not required in case of DC operation.
More on setting parameters of DCemDim can be found in the
section for Controllability. Specific DC
be found in the driver datasheet.
Note: The allowed DC input voltage range accepted by the
driver is stated in the driver datasheet. Values outside that range
will have an adverse effect on the driver performance and
reliability.

Inrush current

The term 'Inrush current' refers to the briefly occurring high
input current which flows into the driver during the moment of
connection to mains; see the illustration on the left. Typically, the
amplitude is much greater than the steady-state input current.
The cumulative inrush current of a given combined number of
drivers may cause a Miniature Circuit Breaker (MCB) to trip. In
such a case, either one or a combination of the following
measures need to be taken to prevent nuisance tripping:
• Replace existing MCB for a less sensitive type (e.g. exchange B
type for C type).
• Distribute the group of drivers over multiple MCB groups or
phases.
• Power up drivers sequentially instead of simultaneously.
Inrush parameters are driver-specific and can be found in
the driver datasheet.
Notes:
• The amplitude and pulse width time of the inrush current are
not in any way
Adjustable Startup Time
Features on p. 32 ).
• The use of an external inrush limiting device (e.g. EBN-OS or
Camtec ESB) or a zero-voltage switching relay (e.g Finder
77 series) may enable a larger amount of drivers to be
connected to a MCB.
effectiveness of such devices in the application. It is the
responsibility of both luminaire manufacturer and installer to
ensure compliance with national electrical codes when either
device is used in the application.
input requirements can
affected by the driver
(AST, see section
Philips has not tested
feature
Control
the
20