Type B Vital Relays - Alstom

Preventive Maintenance
4.5.10. Power-Transfer Relay Test
Follow the procedure in Table 4–16 to test a Power-Transfer Relay. See specific ED
sheet for exact details.
Table 4–16. Power-Transfer Relay Test Procedure
Step
Procedure
1 Perform the visual inspection procedure in Table 4–2.
2 Apply power to the relay.
3 Use this circuit for testing power-transfer relays:
110 V
60 Hz
12 V
MAX.
0-15 V
AC
V
RELAY UNDER TEST
3B
3A
3C
3D
RECTIFIER
Drawing No. 59899-005-03
4 See specific ED sheet for specifications.
P1457, Rev. Nov/07 4–20 Alstom Signaling Inc.