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Medha Servo Drives Pvt Ltd.
MAS 696 Operator’s Manual
Staring Circuit:
Two starting contactors (ST and STA) with resistors (RE ST1 & RE ST2)
have been provided in this cabinet, as shown in Fig. 5.4, for the following
function:
Holding the FUEL PRIME/ENGINE START switch in START provides a
START signal input to the locomotive computer. The locomotive computer
initiates engine cranking by two starting motors by energizing ST (STarting)
contactor through STA (Auxiliary STarting) contactor. Storage batteries
provide energy to the starting motors through ST contactor. Two starting
motor solenoids are mounted at the lower rear right hand side of the engine.
The solenoids engage the starting motor pinions with the engine ring gear.
When both pinions are engaged, full battery power is applied to the starting
Fig. 5.4 ST Contactors and Resistors in ECC#2
RE ST 2
ST
STA
AGAV
RE ST 1
Fig. 5.3 Internal View of ECC#2
Battery
Charger
AGAI
Sensor
AGAV
Sensor
Aux Gen
CB
