TABLE V: PROPULSION SYSTEM COMPONENTS DESCRIPTION (Cont.)
REF.
NO.
COMPONENT FUNCTION
BATFU 19 System Fuse
Provides overload protection for control equipment and
the System Batteries.
BATTSW
Battery Disconnect Switch
(System Batteries)
Connects and disconnects the 12 VDC and 24 VDC
circuit batteries (located at right front corner of truck).
BDI
68
Battery Blocking Diode
Works in conjunction with BFC and BLFP to maintain
battery voltage to CPU.
BFC
67
Battery Line Filter Capacitor
Additional capacitance for BLFP to prevent nuisance
CPU resets.
BLFP 10
Battery Line Filter Panel
(17FM311)
Reduces voltage ripples in System Battery power
supplied to the PSC.
BM1, 2 63
Grid Blower Motors 1 and 2
(5GY19)
DC motors driving blowers to provide cooling air for the
retarding grids.
BM1I 65 Current Sensing Module
Monitors current flowing through grid blower motor #1
BM2I 66 Current Sensing Module
Monitors current flowing through grid blower motor #2
CCLR1, 2 20
Capacitor Charge Resistor
Panels 1 and 2
Connected across the DC link to provide a voltage
attenuated sample of the DC link voltage to the Capacitor
Charge Indicating lights.
CCL1, 2
61
Capacitor Charge Indicating
Lights 1 and 2
Illuminated when 50 volts or more is present on the DC
link (the DC bus connecting the Alternator output,
Chopper Module/Resistor Grid circuits and traction
Inverters).
CIF11, 12, 13, 14,
15, 16
40 Inverter 1 Filter Capacitors
Stores the Inverter 1 DC bus voltage to provide
instantaneous power when the PM1 GTO Phase
Modules first turn on.
CIF, 21, 22, 23, 24,
25, 26
41 Inverter 2 Filter Capacitors
Stores the Inverter 2 DC bus voltage to provide
instantaneous power when the PM2 GTO Phase
Modules first turn on.
CLSW 59 Cabinet Light Switch
Controls electrical cabinet interior lights.
CMAF 27
Alternator Field Current Sensing
Module
Detects amount of current flowing through the Alternator
field winding.
CMT 28
Alternator Tertiary Current
Sensing Module
Detects amount of current flowing through the Alternator
tertiary winding.
CM1, 2 5, 6
Chopper GTO Phase Module 1
and 2 (17FM630)
Controls the DC voltage applied to the grids during
retarding.
CM1A, 1B 45
Current Sensing Modules,
Phase 1A and 1B
Detects amount of current flow through the A and B
phases of Traction Motor 1.
CM2A, 2B 44
Current Sensing Modules,
Phase 2A and 2B
Detects amount of current flow through the A and B
phases of Traction Motor 2.
CPR 53 Control Power Relay (17LV66)
Picks up when the Key Switch and Control Power Switch
are closed.
CPRD Dual Diode Module
Allows two separate voltages to control the CPR coil.
CPRS
Control Power Relay
Suppression Module
Suppresses voltage spike when CPR coil is de-energized.
CPS 56 Control Power Switch
Energizes CPR coil.
E2-42 Electrical Propulsion System Components E02014 3/01
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