Operation Manual – AXA 2400 Compact – 30 - 90 kVA
Service, Maintenance, Overhaul
Document no. 578.650BB
Page 55 of 91
Note!
The value will be automatically reset to Active if the unit detects 28 volts on the "F" pin input of the I/O
board.
Go into the Setup Menu and then scroll up or down to the EF Interlock submenu. Press the center
●
button to enter the submenu, and then press the
●
button again to allow the value to be changed. Press
the up or down arrow buttons to change the selection. Press the center
●
button to record the new value.
Press the LEFT arrow button to exit the submenu and return to the submenu list.
7.9
EF Interlock Ripple Level
The EF Interlock Ripple Level is part of the Neutral Voltage Displacement circuit. If an aircraft has a
large unbalanced load and the aircraft power cable has a broken neutral, then it is possible for the
aircraft frame to be energized to a dangerous level. This condition will result in an AC voltage induced
onto the EF DC signal.
This sub-menu sets the trip level for the AC ripple on the DC EF interlock signal. The default value is
7.0 volts and a setting of 0.0 volts disables the function.
Go into the Setup Menu and then scroll up or down to the EF Interlock Ripple Level submenu. Press the
center
●
button to enter the submenu, and then press the
●
button again to allow the value to be
changed. Press the up or down arrow buttons to change the selection. Press the center
●
button to record
the new value. Press the LEFT arrow button to exit the submenu and return to the submenu list.
7.10 EF Interlock Delay
Some of the newer aircraft take a longer time between when 400 Hz power is supplied to the aircraft
and when the aircraft returns the 28 VDC EF Interlock signal. This setting allows the adjustment of the
amount of time the unit will wait until determining that the EF signal is not present and that the output
power should be shut off. The default value is 3.5 seconds.
Go into the Setup Menu and then scroll up or down to the EF Interlock Delay submenu. Press the center
●
button to enter the submenu, and then press the
●
button again to allow the value to be changed. Press
the up or down arrow buttons to change the selection. Press the center
●
button to record the new value.
Press the LEFT arrow button to exit the submenu and return to the submenu list.
7.11 Aircraft Connector Insertion
Some aircraft power cables are equipped with a micro-switch or split "F" pin in the connector. This
device sends a 28 VDC signal to the unit when the connector is inserted at least 90% of the way into the
aircraft power receptacle. Set this sub-menu value to Enable when such a cable is connected to the unit.
The default value is set to Disable.
Go into the Setup Menu and then scroll up or down to the 90% Insertion Switch submenu. Press the
center
●
button to enter the submenu, and then press the
●
button again to allow the value to be
changed. Press the up or down arrow buttons to change the selection. Press the center
●
button to record
the new value. Press the LEFT arrow button to exit the submenu and return to the submenu list.