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

Scheduled MaintenanceTable 4–19. Controller Contact Adjustment ProcedureStepAction1 The controller contacts are adjusted by using shims.2 Place shims behind the head of the contact screw so that the front contactjust makes when the armature is 0.030 to 0.040 inch away from the upperresidual pin in the top pole piece.3 Verify current by operating the contactors.• To operate contactor C1 electrically when the controller is not in themachine, connect positive energy to post B, negative energy to post 10.• To operate contactor C2, connect positive energy to post 6, negativeenergy to post B.(On single switches, contactor C1 operates the switch to the right whenenergized; contactor C2, to the left.)4 Contact pressure should not be less than 256 grams (9 ounces) and contactresistance should not exceed 0.1-ohm.5 Compare current to the electrical values of the contactors at 70°F providedbelowAt Nominal Voltage 10 -12 24 - 32Working Current Not To Exceed 0.145A 0.145ADropaway Current Not Less Than 0.026A 0.026AP1293, Rev. Jun/07 4–38 Alstom Signaling Inc.