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- 59 FAILURE OF ALTERNATING CURRENT (AC) SUPPLY FROM THE MOTOR
ALTERNATOR OR BATTERY CHARGER INOPERATIVE
light
occur
light
brake
The alarm circuit will be energised causing the blue
to shine and alarm bell to sound should the failure
on the motor side of the alternator, then the red fault
will also shine with the accelerating and/or regenerative
handle in the 'off' position.
The following items are to be checked:-
1.
Line voltage is more than 1100 volts.
Note: If the line voltage is less than 1100 volts then
the no volt relay will function.
2.
Accelerating and regenerative brake handles are in the
'off' position.
3.
Press the fault reset button if the red indicator light
is shining.
4.
Motor alternator (AC) supply circuit breaker is not tripped.
5.
Battery charger circuit breaker is not tripped.
6.
Supply indicator circuit breaker is not tripped.
When the defect cannot be rectified to silence the alarm
and extinguish the blue light, isolate the motor alternator by
turning off the supply isolate switch.
Under these conditions, the motor alternator is a
failure, the traction motor blowers and starting resistor
blower fans will not operate. Notching is only possible in
positions 1 to 3 of the accelerating handle and the locomotive
can only be operated up to full series.
The ammeter readings should be controlled during notching
in resistance to a maximum of 400 amps which will restrict
operation to light locomotive running only.
The notching of starting resistances out of circuit must
be completed within sixty (60) seconds to prevent overheating
of the resistances without the blower fans.
Should this period be exceeded, then power to the traction
motors is interrupted and cannot be re-applied for a period of
three (3) minutes.