Type B Vital Relays - Alstom

Installation
Table 3–2. B Relay Installation Procedure (Cont.)
Step
Procedure
5 Code rate transmitter relays are shipped with the rotor locked to prevent
damage to the relay.
Before placing the relay into service the rotor must be unlocked by moving the
arm on the back of the relay as shown below.
ROTOR LOCKED FOR SHIPMENT
Arm is located at back of transmitter.
TO UNLOCK ROTOR FOR SERVICE
Slide arm at back of transmitter to
the position shown below
Arm
Arm
Back of Transmitter
Back of Transmitter
A visual examination of the relay should also be performed to verify that with the
arm in the unlocked position the rotor lock does not contact the rotor in any
position of the rotor.
After the relay is installed to its plugboard, the code rate of the relay should be
verified to ensure it is correct.
P1457, Rev. Nov/07 3–4 Alstom Signaling Inc.