humptybump
Well Known Member
OK, I am really struggling with my electrical system. I honestly can not figure out what a good answer is based on the other threads in this forum. Each one is helpful but missing some important details.
Let's assume the following:
Given the above, can the experts here help me accomplish the following:
If you have answers to the above questions or can point me to sources, I would be grateful for your assistance. (I also think I am not alone so I suspect this thread will prove useful to those who follow).
Let's assume the following:
1) There is a battery, an alternator, and a backup battery. For simplicity sake, lets not complicate the alternator with external VR or OVP. Let's just treat these as three 12V+ sources.
2) There is a minimum set of equipment and then there is everything else. These translate to the essential bus and the non-essential bus. Some designs I see have a hot bus or battery bus and if this is important, then lets add that too.
3) we want to minimize complexity.
4) For sake of design, the Alternator produces 60A, the essential bus requires 20A, and the non-essential bus requires 40A.
2) There is a minimum set of equipment and then there is everything else. These translate to the essential bus and the non-essential bus. Some designs I see have a hot bus or battery bus and if this is important, then lets add that too.
3) we want to minimize complexity.
4) For sake of design, the Alternator produces 60A, the essential bus requires 20A, and the non-essential bus requires 40A.
Given the above, can the experts here help me accomplish the following:
A) Wire the alternator and battery sources such the main battery starts the airplane, the alternator charges both batteries, and the essential bus will run off of the alternator, the primary battery, or the backup battery (in that order of failure).
B) Identify where the circuit breakers, fuses, or ANLs go and what size.
C1) If you use a switch, please let me know a source and part number.
C2) If you use a relay, please let me know a source and part number.
C3) If you use a diode, please let me know a source and part number.
(one of the problems I am having in understanding a lot of the related threads is they say "use a diode" or "you don't need a relay" but the information I can find does not tell me which diode or switch can handle the circuit and thus I am left no knowing if I will create smoke.)
B) Identify where the circuit breakers, fuses, or ANLs go and what size.
C1) If you use a switch, please let me know a source and part number.
C2) If you use a relay, please let me know a source and part number.
C3) If you use a diode, please let me know a source and part number.
(one of the problems I am having in understanding a lot of the related threads is they say "use a diode" or "you don't need a relay" but the information I can find does not tell me which diode or switch can handle the circuit and thus I am left no knowing if I will create smoke.)
If you have answers to the above questions or can point me to sources, I would be grateful for your assistance. (I also think I am not alone so I suspect this thread will prove useful to those who follow).