User manual

Table Of Contents
Section Part B
PART 6 ELECTRICAL FAILURES
25 GENERATOR FAILURE
The failure of one generator is not serious as the normal electrical load is able to be
supplied by either generator by itself. Frequent monitoring of the generator load during
flight is necessary to determine that the generators are functioning correctly.
Normal charge rate is between 5 and 20 amps at 26-28 volts depending upon the state of
the batteries.
Maximum charge rate of either generator is 40 amps. Should this level be reached the
load must be reduced until the rate is reduced. The high charge rate is indicative of an
electrical fault and the cause should be found
1 Reduce known electrical load to reduce charge rate( s )
2 If only one generator is showing high charge rate switch it off
and then on again. If the fault persists leave the generator off,
and reduce load so that flight can continue on one generator.
3 If one generator ceases to charge during flight switch the
generator OFF and continue as in 2 above.
4 If both generators show abnormal charge rates or cease to
charge both
should be switched off. The flight should be terminated as
soon as possible, and the remaining battery power conserved
for use by essential services such as the radios for safe entry
into Controlled Airspace and the alerting of ATC.
Abnormally high electrical loads risks an electrical fire.Therefore:
Generator Switches
Battery switch
Circuit Breakers
Generator and Battery
Switches
Charge rate
Off
Off
Turn off equipment in use
Restore
If normal
restore power in turn to determine
faulty equipment.
If abnormal
switch generators off.Continue
as in 4 above
26 BOILING BATTERIES
Boiling batteries are a direct result of abnormal charge rates
Check each generator charge rate in turn to determine if either generator is overcharging
the batteries due to over voltage. If this is the case turn the errant generator Off and
continue using the remaining generator.
Reduce electrical load so that single generator operation remains within limits.
Rev No: 00 Stichting Catalina PH-PBY
Page: 22 18 May, 2004