1 Reply Latest reply on May 17, 2008 12:54 PM by Joel_Pointon

    modelling inrush current on HID lamps

    johnw

       

      High Intensity Discharge lighting is becoming more common in lighting.  Normal operating current consumption is significantly lower than incandescent bulbs of similar light output, but  startup current can be very large – several times the normal operating current, and the wiring must be designed to accommodate this.

       

       

       

       

       

      Here’s the way to model this in VeSys:

       

      • Create a custom component, as shown, and set the inrush path’s load to the specified inrush current.

      • Build the design, as normal

      • Define Named Switch States for both the startup condition – inrush switches closed - and the normal operating conditions.

      • Test the wiring using the startup state