Trouble Shooting Directory for Three Phase Locomotives - eLocoS

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INDIAN RAILWAYS Brief description of the loco Driver's Manual for WAG9 The primary suspension, located between the axles and the bogie frame, is provided by twin coil springs on the axle journal box fore and aft of the axle line. Vertical hydraulic dampers are used to dampen the rebound rate of the springs. This “Flexi coil” arrangement permits lateral movement of the axle. Longitudinal control of the axle, and the transmission of tractive and braking effort to the bogie frame, is provided by guide rods connected between the axle journal boxes and bogie frame. Spheribloc rubber bushes in the guide rods allow the axle lateral movement without undue restriction. Secondary suspension is also provided by coil springs and vertical hydraulic dampers, located between the bogie frame and the locomotive under frame on each side of the bogie. The weight of the locomotive car body is carried by the secondary suspension springs. The “Flexi-Float” arrangement of the secondary suspension allows the locomotive car body to move both laterally and vertically within certain limits relative to the bogies. 2.2 Electrical Features: - Vehicle propulsion concept: 3-phase converter drive. - Main transformer The main transformer is housed in an aluminium tank. It is mounted underframe between the two bogies. - Traction Converter The machine room contains one traction converter per bogie with 2-point switching. This comprises a line converter (NSR) and a 3-phase drive converter (ASR). The traction motors are supplied with power directly by two relevant bogie selective drive converters with appropriate control electronics. - Axle drive Three externally ventilated three-phase asynchronous squirrel cage motors of Type 6 FRA 6068 are installed on both bogies. The three traction motors on each bogie are supplied with power by one traction converter. CHITTARANJAN LOCOMOTIVE WORKS Ident. No. 3EHW411172 Ver-1 Chap. 2, Page - 2
INDIAN RAILWAYS Brief description of the loco Driver's Manual for WAG9 - Harmonic Filter The harmonic filter consisting of resistor and capacitor reduces the high frequency harmonics. - Auxiliary Circuits Three modular auxiliary converters (BUR) are used to supply power to the 3-phase auxiliary circuit motors. The auxiliary circuits are designed in a bogie-selective manner. - Control electronics (MICAS-S2) All functions of the locomotive are controlled by the control electronics. It takes the form of bus stations with processors. The bus stations communicate with each other via fibre optic cables which are resistant to the effects of Electro Magnetic Interference (EMI). The diagnostic equipment comprises a diagnosis computer with monitor and keyboard in the driver’s cab. This provides an effective support for the duties of the locomotive driver and maintenance personnel. - Multiple Unit Control The locomotive is equipped for multiple unit control with locomotives of the same kind. However, no more than two locomotives can be connected together. Commands are transmitted by the UIC cable. Comfort Equipment Every driver’s cab is equipped with two fans and a unit for recirculating and heating the air. Recently cab air-condition has been introduced in WAG-9 type locomotive. CHITTARANJAN LOCOMOTIVE WORKS Ident. No. 3EHW411172 Ver-1 Chap. 2, Page - 3
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Trouble Shooting Directory for Three Phase Locomotives - eLocoS

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