???Load circuits for a lighting power supply???

[Jester]

Okay, this is my first visit here but I hope not the last. To start, let me say that I am not an engineer. I exist as an electronics tech and have been here for over 20 years. I am currently working on a couple of test boxes to simulate an aircraft load circuit (for emergency lighting) and as an interface to facilitate troubleshooting. The test circuitry I am attempting to build is for is a DIEHL 3214-20 and -40 series Emergency Lighting Power Supply Unit. The first problem I am having is balancing the current in this simulated load circuit. No matter what configuration of components or adjustments I try, the end result = a current value higher than the specified value in the CMM (Component Maintenance Manuel). I realize that this medium we are in is insufficient for a real assesment of what my problem is but if some of you could help, we could look at the possibility of my faxing you copies of the circuitry and circuit conditions. ANY help would be appreciated.<br>
Thanks,<br>
Jester

 

[ronhotchkiss]

One aspect of this type of problem that is often overlooked is the amount of current available from your source. For instance, if you are close to a sub-station, you have more fault current available than if you were 20 miles away. Another example, would be to compare the current that you can get from a car battery versus single cell battery. The supply that you are simulating may be severely current limited. Try looking at the problem from this aspect. Hope this helps.

 

[ELECTRICKEN]

Could you give us a little more info- volts,A/C-D/C,<br>
expected current is the load inductive?<br>
Could you E-mail me a circuit drawing of your test circuit <br>
with values,&quot;real and needed&quot; <br>
<br>
<A HREF="mailto:elken@frontiernet.net">elken@frontiernet.net</A><br>