Models 5E, 5F, 5G & 5H Electric Switch Machines: Single ... - Alstom

General DescriptionTable 1–2. Model 5 Series Switch Machine ComponentsComponentBox Style Bearings andWear PlatesCam BarCutout SwitchesDC MotorMotor Commutator andBrushesMotor Magnetic HoldingDeviceMotor Magnetic Detent andDynamic SnubbingFriction ClutchGearsHand CrankLock RodPoint Detector MechanismThrow BarFunctionProtects the frame from wear.Moves along the machine frame, unlocking the lock rodand throw bar, so that the throw bar and switch pointscan move to the opposite direction.Removes all power to the switch machine motor.Converts 110 VDC (or 24 VDC) electrical energy tomechanical energy, providing a rotating motion for drivingthe gear train.Work together to provide current to the correct armaturewinding(s) in the motor and provide torque.Prevents unwanted armature rotation after energy isremoved from the motor.Quickly slows and stops armature rotation.Absorbs the shock encountered in switch operation.Provides the force needed to move the switch points.Operates the switch machine any time operation bypower is not desired or not possible.Mechanically locks the points; ensures that false pointdetection is not obtained when the switch machine islocked and the lock and detector rods have not movedtogether.Indicates position of the points; detects when the switchpoints are within the proper distance from the stock railand are locked.Moves the points; works with the cam bar and pointdetector mechanism to provide the movement of theswitch points.P1293, Rev. Jun/07 1–6 Alstom Signaling Inc.