Lutron Hi Lume 3D Eco Ballast Dimming Problems

Hello,

Working on a turn on and we are having some odd behavior with a couple of circuits of Lutron Hi Lume 3-wire ballasts dimming fluorescent fixtures.

A single cove has four circuits of these ballasts.  Two circuits operate correctly, two circuits pulse from their set level to full every 6 seconds (except every 10th pulse, which is a 12 second interval).  This happens throughout the dimming range from 1%-99%.

This problem is intermittent, it seems that the ballasts need to warm up for 20 minutes or so before they will exhibit these symptoms.  Both circuits pulse in unison.

SR48 with a CEM3.  All four circuits are dimmed with a D20F.  The two problematic circuits share a signal distro card.  

We have installed a new signal distro card, no change.
We have  changed the SCR off time from 500 to 750 and 1000, no change either time.
The electricians isolated ballasts in the circuit with several different ballasts, no change.
 
The electricians metered the circuit at the lug, with the load attached, and we see jumps of 6-12 volts.  The only source of control is sACN from Paradigm.

Our next thought is that the dimming wire for each circuit could be crossed (Fixture A wire to circuit B, fixture B wire to circuit A)

Any thoughts? 

  • Hi Chris,

    Are you 100% sure that the switched hot and dimmed hot are not swapped?  It would likely look like what you are seeing.

    Lots of questions, if you will be so kind to answer:

    - What model ballast?

    - What lamp?

    - What are the dimmer settings on the problem circuit?  Please send us all parameters.

    - Are any of these ballasts or circuits tied to emergency systems or backup ballasts?

    - Are all the ballasts on the circuit showing the porblem, or just some of them?

    - How long were the lamps burned in a full?

    - Have you isolated the circuit down to just one ballast and tried it again?  It could be that a bad ballast is causing the entire circuit to falter.

    Let me know what you find,

    David