Filament Warming Current?

Hi All,

Just wondering if anyone has a tech document that states the filament warming current / expectation for the old 5104D750 flat pack 4 channel dimmers.

I have a client who has many of these units on his network driving halogen loads with iron core transformers. We have found a high standby current being used by the dimmers when all lights are off and just wanted to confirm what we are seeing in measurement matches the bleed current expectation.

In the old manual it states 'Off State Power Consumption' < 1.3W but not sure if this includes the warming or not.

Any information appreciated.

Brad

 

Hi Nick,

Sorry for the old theatre lighting reference to filament warming. Theatre Triac Lighting racks usually keep the filaments of theatre spots warmed slightly with bypass current to prolong the life of the expensive bulbs. I had always surmised that the C-Bus dimmer leakage current was for the same purpose.

Thanks for the tech information and it confirmed what I would have thought ie minimal leakage current flow, 11ma wouldn't swing it. It is strangely looking more like 15-20W per dimmer module being pulled across the dimmer array, but I haven't split them out individually yet. It may just be a single partially faulty dimmer module pulling all the load? Loading was based on watching the main power meter usage after inline and CT based readings, so it is billable power being used.

Looks like I need to look elsewhere to find the culprit,

Thanks,

Brad

 

wrong thread