B737 -electrical question
Hello everybody
This must be elementary for most of you. But I do not know the answer
1.When placing the DC meters selector (on the AC/DC metering panel) to BAT BUS or STBY PWR, why is the amperage indication blank (no value) and only voltage indication shows. Why no amperage? Is there no current flow to the equipments concerned from BAT BUS?
2. I have been told that BATTERY DISCHARGE light illuminates (ofccourse when there is excessive battery disch) when you start the APU with battery power (no AC power available), but the Master caution will not illuminate if the APU starting is the cause of BAT DISCH light to illuminate. What logic does this have?
Kindly help me with this
Thank you in advance