ITW GSE 6400 Tier 4, Руководство по эксплуатации

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Operation Manual - ITW GSE 6400 Tier 4
d) Warnings/Faults
The control system reacts appropriately to different detected issues. These types can be
generalized between warnings and faults. Warnings are given when the system is able to function
but requires servicing/user interaction. Faults are generated when the unit cannot or should not
supply regulated power to the aircraft.
All faults prevent the engine from starting. However, they react differently to an operating unit.
Faults can be categorized into three subcategories as defined by the fault number.

Fault numbers less than 6000
o
Minor faults: Will disconnect power to the aircraft but not affect engine and generator
functions.

Fault numbers between 6000 and 8000
o
Mid-level faults: Will disconnect power to the aircraft, turn off the generator and shut
down the engine after the required 30 second cool down.

Fault numbers greater than 8000
o
Major faults: Result in immediate shutdown of all system components including the
engine. Service is required on the unit before it is returned to operation.
Engine generated warnings and faults are also monitored and their respective Cummins fault
numbers are shown on the display.
e) Generator
The generator is a 3-phase AC generator whose output is rectified. The generator consists of the
generator housing assembly, which holds the stator windings, and a rotor, which holds the control
winding. The generator housing assembly bolts to the engine flywheel housing. A flexible coupling
assembly connects the front end of the rotor to the engine flywheel. At the rear of the generator, a
bearing supports the rotor and brushes and slip rings provide the electrical connection to the exciter
winding.
The generator consists of six windings, which result in 12 numbered output leads. When
connected at the rectifier assembly, these windings form two three-phase delta connections. The
rectifier assembly, described later in this section, converts the three-phase AC to the DC for the
generator set output.
The generator is self-excited. Part of the generator’s output powers the rotating control winding.
One positive and one negative brush in contact with slip rings supply controlled excitation current.
The voltage regulator controls the excitation current and maintains a constant output voltage.
Access to the brushes is through holes in the rear end bracket.
A radial-blade fan behind the coupling hub draws cooling air over the generator windings. Air
flows over the rectifier assembly and then enters through the rear end of the generator and is
discharged through openings in the flywheel housing at the drive end.
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