Type B Vital Relays - Alstom

Parts Catalog
7. SECTION 7 – PARTS CATALOG
7.1. GENERAL
This section identifies and lists the component parts that may be ordered to repair the
Alstom family of B relays at the shop level. It also includes a list of the plugboards and
other relay parts required for installation. Parts are identified by drawing number and
catalog number (where available) except for common hardware items that are identified
by a generic description. All drawing numbers consist of 10 digits. Drawing numbers are
equivalent to part numbers. Some parts do not have a catalog number.
7.2. PARTS LIST
Each illustration of B relay components is followed by a parts list giving part description,
drawing number and catalog numbers of replaceable parts. Index numbers are listed to
locate referenced parts in the illustration. Where applicable, references are provided to
other pages to better show where parts are located in the assembly. This section of the
manual covers all currently manufactured parts.
Table 7–1. B Relay Drawings and Parts Lists
Description Figure No. Table No.
B1 Neutral and Biased-Neutral Relay 7–1, 7–2 7–2
B1 Code-Responsive Relay 7–3 7–3
B1 Slow Pickup, Slow-Release, Quick-Crossover and
Electronically-Driven Highway Crossing Flasher Relay
7–4, 7–5 7–4
B2 Neutral Relay 7–6 7–5
B2 Biased-Neutral Relay 7–7 7–6
B2 AC Vane Relay 7–8, 7–9 7–7, 7–8
B2 Code Rate Transmitter Relay 7–10 7–9
B2 Microchron II Timer Relay (DC) 7–11 7–10
B2 AC Microchron II Timer Relay 7–12 7–11
VTB Polar-Biased Relay 7–13 7–12
Coils and Springs — 7–13
Contact Groups 7–14, 7–15 7–14
Contact Group Pushers and Clips — 7–15
Plugboards and Supplies 7–16, 7–17 7–16
Registration Plates and Gaskets 7–18 7–17
P1457, Rev. Nov/07 7–1 Alstom Signaling Inc.