Some Question on Boeing 737NG Electric System
Hi all PPRUNE members,
I'm currently reviewing a B737NG Electric system by CBT and it getting a little bit
confusing.
- First, in the standby power section. The CBT said that if the Standby power is
at auto position and battery is place to off and no AC generator is operate
the AC and DC standby bus will not be energize by battery. Why? Isn't the
battery switch control the switch hot battery bus only?
[Refer to the Schematics in the book " Boeing 737 Technical Guide" page 96]
- If we switch the battery off during the normal config [all IDG operate,
AC Transfer Bus operate] the engine will not shut down and the aircraft
equipment will continue to operate
[except the equipment in Switch hot bat bus]. Am I understand it right?
- Why during making the Auto land, the DC Bus tie open and separate the
Left & Right Electric sys.
That should be all the questions I have. Thanks for all of your reply.
Best Regards