Type B Vital Relays - Alstom

Theory of Operation
R
N
REVERSE
CONTACTS
CLOSED
S
N
RECOMMENDED
VOLTAGE TO
POSITION RELAY
REVERSE
Figure 2–20. Armature Knocked Down with Reverse Polarity
(FRONT VIEW)
16 26 36
25
24
14 34
13 23 33
22
21
11 31
NORMAL CONTACTS ARE 13, 16, 33 AND 36
REVERSE CONTACTS ARE 11, 14, 31 AND 34
FOR SERIES COIL CONFIGURATION AT 10 VOLTS,
WITH + ON 21 AND - ON 26 AND 23 & 25 JUMPERED
THE NORMAL CONTACTS CLOSE.
WITH - ON 21 AND + ON 26 AND 23 & 25 JUMPERED
THE REVERSE CONTACTS CLOSE.
I
O
I
O
3E
THICK WIRING IS PLUGBOARD WIRING.
THIN WIRING IS INTERNAL RELAY WIRING.
I = "IN" LEAD
O = "OUT" LEAD
Figure 2–21. B1 Magnetic-Stick Relay Wiring
P1457, Rev. Nov/07 2–20 Alstom Signaling Inc.