TM 55-1730-229-12
TO 35C2-3-473-1
Generator AC Faults, 83-360A Only
Indication
Fault Lamp
Fault
(latched)
Indication
Protective
Voltage/
Current for CURRENT LIMIT SELECTOR
After
During
Action
Switch Settings
Fault
Fault
10KW
20KW
30KW
45KW
(36A/) (72A/) (108A/ )
(162A/
)
Voltage
>10
>20
>30
None (see
None
None
Normal
<45
<45
<25
note)
(108-118
OVER
UNDER
Field
vrms)
CURRENT
VOLTAGE
>45
>45
>45
>45
excitation
After 5
removed after
second
30 seconds
delay
Voltage
AC contactor
<10
<20
<30
<45
None
<108 vrms
opened after
>10
>20
>30
UNDER
4-7 seconds
<45
<45
<45
VOLTAGE
OVER
>45
>45
>45
>45
CURRENT
Voltage
AC contactor
OVER
>118 vrms
opened
None
VOLTAGE
Voltage
AC contactor
UNDER
<375 Hz
opened
None
Note: When voltage is within normal limits and output power is less than 45 KW,
the generator will continue to operate regardless of CURRENT LIMIT SELECTOR
switch setting. The GCU will reduce field excitation to reduce generator voltage
as current increases above the selected limit. The voltage will drop below the
normal limit (104 4 vac) and the GCU will open the ac contactor when current
exceeds the values listed below:
CURRENT LIMIT SELECTOR
Switch Setting
Actual Current Limit
10 KW (36 A/)
13.25 to 14.35 KW (48 to 52 A/)
20 KW (72 A/)
26.5 to 28.7 KW (96 to 104 A/)
30 KW (108 A/)
39-75 to 42.78 KW (144 to 155 A/)
Note: > indicates greater than, < indicates less than, < indicates equal to or
less than.
