TABLE V: PROPULSION SYSTEM COMPONENTS DESCRIPTION (Cont.)
REF.
NO.
COMPONENT FUNCTION
GFR 52 Alternator Field Relay (17LV66)
Picks up with GF contactor and applies B+ to the AFSE
(battery boost) during initial acceleration phase.
GFRS
Alternator Field Relay Coil
Suppression Module
Suppresses voltage spikes when GF coil is de-energized.
GRR 26 Ground Resistor Panel
Detects power circuit grounds.
INV1 TMC CARD
Inverter 1 Central Processing
Unit Card and Input/Output Card
(17FB172)
Generates Phase Module turn-on/turn-off commands for
the Inverter 1.
Monitors voltages and currents from various areas for
Inverter 1. Monitors Traction Motor 1 speed.
INV2 TMC CARD
Inverter 2 Central Processing
Unit Card and Input/Output Card
(17FB172)
Generates Phase Module turn-on/turn-off commands for
the Inverter 2.
Monitors voltages and currents from various areas for
Inverter 2. Monitors Traction Motor 2 speed.
I1CO
57
Inverter 1 Cut Out Switch
Cuts out inverter 1 when in the “cutout” position. Located
on switch/LED panel, left front corner of electrical cabinet.
I2CO 58 Inverter 2 Cut Out Switch
Cuts out inverter 2 when in the “cutout” position. Located
on switch/LED panel, left front corner of electrical cabinet.
KEYSW Key Switch
Connects battery voltage to CPR and control circuits
when closed. (Located on instrument panel.)
LDBXI 48
Load Box Current Sensing
Module
Monitors current during load box test.
LEDP
60
Light Emitting Diode Panel
LED’s indicate status of the following:
CPR: Illuminated when CPR is energized.
SYS RUN: Illuminated when the PSC power-up
sequence has completed successfully and control logic is
executing.
NAFLT: When illuminated, indicates a fault has occurred
that prevents propulsion or retarding.
TEST: Illuminated when system is in the Test state.
REST: Illuminated when system is in Rest state and there
is essentially no voltage on the DC link.
LINKI 7 Link Current Sensing Module
Detects amount of current flow through the DC link.
LINKV 3
Link Voltage Measuring Module
(17FM458)
Attenuates the high voltage from the DC link to a level
acceptable to the electronics on the Analog I/O card in
the PSC.
L1, 2, 3 Cabinet Lights
Provide interior cabinet illumination.
M1, 2 Motorized Wheels (5GDY85)
Each Motorized Wheel consists of a Traction Motor and a
Transmission Assembly. The 3-phase asynchronous
Traction Motors convert electrical energy into mechanical
energy. This mechanical energy is transmitted to the
wheel hub through a double reduction gear train
(Transmission).
E2-44 Electrical Propulsion System Components E02014 3/01
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