Voltage Limits

[Pinecone]

I have looked through the POH and the only thing it says is that the annunciator will indicate if the voltage is too low or too high.  No numbers.

So, if you were putting in a monitor for voltage, what would you set the Low and High levels to alarm at?

For my case, for a 24 volt system.

[philiplane]

Low volt alarm should activate at 25.5 volts, high volt alarm at 29.5 volts.

Normal voltage above 1500 rpm should be 27.5 to 28.5 volts. 

[Pinecone]

Great, thanks.

[Guest]

From the maintenance manual,

[PT20J]

More info from the service manual. Note that the HI VOLTS annunciator doesn’t actually measure bus voltage but illuminates when a signal from the voltage regulator indicates that the over voltage protection circuit has tripped.