INRUSH CURRENT OF LAMP

Abstract

Abstract
Lighting systems pass through big change in terms of light source recently. LED replace discharge lamp and this
change represent change of electrical parameters and influence to installations. Lighting systems with discharge
lamp use inductive ballasts with choke and starter or electronic ballasts. Lamps with LED use drivers which are
switching sources. The drives include rectifier, high frequency oscillator, transformer and capacitors. Typically,
rectifier has impact to distortion of luminaire current and capacitor has impact to inrush current. Over the last
years, problem increases with inrush current. Public lighting networks reconstruct with LED luminaires. Often
increase inrush current and circuit-breaker must be changed for stronger. This change cause increasing of
payment for energy distribution and sometime is necessary change installation. Aim of this paper is describe
difference between luminaires from point of view inrush current. Size and duration of inrush current depends on
construction of driver and on phase of supply voltage. In paper are analyzed amplitudes, durations and behavior
of electrical parameters various LED luminaires.
Key words
LED, lamp, driver, inrush current