Ralf,
I’ll try to help if you’ll send me a sketch of your regulator wiring, AND the specific B&C regulator you are using. B&C has several different types of regulators, and the hookup for the different models is significantly different. I would first suspect the wiring at the regulator connections.
I am using a B&C LS-1A regulator (and B&C alternator) for my secondary electrical system, and an LR3-C (w/Continental 100A/28V alternator) for the primary system. Both have worked flawlessly for 2+ years/500+ hours. They operate completely independently, with a cross-tie capability, except that they both feed the avionics/instruments bus through Schotky diodes, providing continuous and uninterrupted power to the instruments if either master switch (bus) is energized. Each alternator warning light flashes when the voltage on the respective bus drops below about 24 volts.
I’ll send you my wiring diagrams for these two regulators directly. Note that they are significantly different. Don’t use these diagrams with another model! Write or call me off-line if you’d like.
Bob Pastusek
757-286-4802 cell
Dear subscribers,
I am using a bnc regulator on a TSIO550 with a teledyne alternator on my 4P.
I rewired the complete airplane so I can not completely exclude an installation error from my problem.
My symtoms:
I turn on the master switch (engine off) and my low volt light is continuously on. I add heavy electrical load and the light starts to flash. – Everything good so far.
I turn on my engine but the continous low volt light does not go off. When I add all the available electrical load that I have and let the engine idle at low rpm I get the flashing from the light – when I increase the rpm the flashing turns into a steady light again (I also see 28V on my VM1000 and the amps that the alternator is feeding back)
Bnc checked my regulator and they told me it tested ok.
I connected my F1 terminal at the alternator to ground. The F2 terminal from the alternator is connected to the regulator.
If you would have any idea of what I am doing wrong here please let me know
Thanks
Ralf