Static Inverter PC-17A

[samer747]

Hello,

I don't know if anyone is using the same static inverter PC-17A can help me out decide whether my unit is bad or more wiring needed. I connected 24vdc @ 40Amp power supply to pins D/F but NO 115vac 400Hz output on pins B/C, my wiring diagram is for PC-17 unit not PC-17A which has (Remote ON/OFF pins E/H) not covered by my diagrams. Do I need to do any wiring for the Remote pins??

At this point I'm not sure whether the unit is actually bad or my wiring, Hopefully someone might have an input.

Regards,

Sam
 

[JG]

Sam, I'm not familiar with this inverter, but if I were a betting man I'd say you need to connect pins E&H and also put a 400hz signal on pin I. This would normally come from the aircraft generator so that the inverter output is in sync with it. The unit may have an internal jumper or setting to allow it to free run. If it were me, I'd just down load the manual for 25 bucks.
Cheers, J.G.

[garys]

Are you able to at least test for 26v from pins A/C?

[samer747]

Hi JG, I thought of jumping pins E/H but I was hesitant without diagram, all I could find the manual for PC-17 which don't have remote pins.


Hi Gary, I will test the 26vac first thing in the morning, and might try to tump remote pins and see what will happen.

Will update results,

Regards

[Jeroen Hoppenbrouwers]

I agree that connecting E+H together is low risk. Airplane discretes are in the vast majority of cases a grounded pin (the return) and a pin that is internally pulled up to some reasonable voltage by a medium resistor. It senses being grounded. You can try measuring voltage on E against H.

The 400 Hz input may or may not be needed, I agree here that it likely is required but who knows. Should an inverter not be able to free-run if there is no source to sync to?


Hoppie

[Gary Oliver]

I have the same inverter.  Pins E & H need bridging to turn the inverter on.

Pins D and F are wired to a 28VDC supply.

B and C provide my 115V 400HZ



https://imgur.com/a/1vUG6ha for bigger image.

Cheers
G

[samer747]

Thank you all, Gary, Gary, Hoppie, JG. It did work. I needed to bridge the remote pins, some times I hesitate to do certain things without diagrams or confirmation from someone that has experience.

Thanks again.

Best regards,

Sam

[JG]

Sam, that is very wise.....115Vac can be considered dangerous voltage and dealing with it without training and a knowledge of required conductor sizes and insulation requirements is likely not legal or safe. Hoppie is on the money when he says you should always measure or know the potential between 2 things you're about to connect together. In power systems, DC voltage also carries risk, the higher the voltage the greater the risk to human well being, the lower the voltage the greater the current, the more chance of heat and fire in a system not properly designed or repaired.
Enjoy your project, keep measuring and asking questions. I'm still learning stuff after 40 years of working with electrical, electronic and RF systems. Cheers, J.G.