Extra EA 500 - System and Equipment Limitations; Electrical Power Supply

Section 2 Pilot’s Operating Handbook
Limitations EXTRA 500
2.16 System and Equipment Limitations
2.16.a Electrical Power Supply
1 Starter Generator
The maximum continuous Starter generator current Output is
limited to 200 Amps (28 V DC).
2 Starter Operation Limits
Caution The Starter Operation cycle is limited to 30 seconds.
If several Starter cycles are necessary, the following Starter
generator and engine cooling periods must be observed:
1
st
cycle: 30 seconds ON - 1 minute OFF
2
nd
cycle: 30 seconds ON - 1 minute OFF
3
rd
cycle: 30 seconds ON - 30 minutes OFF
3 Standby Alternator
If bus voltage drops below 26 ±0.2 V DC, the standby operates
automatically. The standby alternator System is limited to
20 Amps continuous electrical current output.
However, transient operations of greater than 20 Amps for no
more than 5 consecutive minutes may be conducted.
Flashing of the STDBY ALT ON light on the annunciator panel
indicates, that the standby alternator is:
- delivering power to the bus
- producing more than rated 20 Amps electrical current.
A load of 20 Amps or less is indicated by steady illuminating of
the STBY ALT ON annunciator light.
For full rated power output a minimum N l of 93 % is necessary.
4 Bus Voltage
Normal generator operation: 28.5 ±0.5 VDC (Standard setting)
Standby alternator operation:
26.0 ±0.2 down to 25.0 VDC at rated 20 Amps.
2-22 26. January 2011