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

Scheduled Maintenance4.9.2. Obstruction And Overload Relay Test And AdjustmentOverload relays are factory adjusted to pick up in about three seconds after the clutchbegins to slip. There must be at least 0.010 inch clearance between spring 3 and stop 4when the relay is de-energized. De-energized contact pressure should be 90 to 100grams.Table 4–8. Obstruction and Overload Relay Test ProcedureStepAction1 Place the obstruction gauge (1) between the switch point and the stock railfor the reverse position.2 Operate the switch machine, noting the length of time from when themachine encounters the obstruction and until the overload relay picks up. Itshould pick up within 1 to 10 seconds.3 To increase the pickup time of the overload relay, turn slotted-head nutclockwise to decrease the pickup time turn nut counterclockwise.N U TP1293, Rev. Jun/07 4–15 Alstom Signaling Inc.