Type B Vital Relays - Alstom

Preventive Maintenance
4.5.6. Magnetic-Stick Relay Test
To verify the performance of the magnetic-stick relay, follow the procedure in
Table 4–12.
Table 4–12. Magnetic-Stick Relay Test Procedure
Step
Procedure
1 Perform the visual inspection procedure in Table 4–5.
2 Stabilize relay by operating 5 to 10 times, alternately from NORMAL to
REVERSE, at the saturation value specified on relays specific ED sheet.
3 Saturate Reverse at value specified on ED sheet.
4 Gradually reduce current to zero.
5 Reverse polarity and gradually increase current to point where armature moves
to normal contacts. Without further increase in current, armature must proceed
through to full normal position against stop. This is the NORMAL PICKUP and
WORKING current and must be within the limits specified on ED sheet.
6 Saturate normal at value specified on ED sheet.
7 Gradually reduce current to zero.
8 Reverse polarity and gradually increase current to point where armature moves
to Reverse contacts. Without further increase in current, armature must proceed
through to full reverse position against stop. This is the REVERSE PICKUP and
WORKING current and must be within the limits specified on the ED sheet.
P1457, Rev. Nov/07 4–16 Alstom Signaling Inc.