Type B Vital Relays - Alstom

Topic
TABLE OF CONTENTS
Page
1. SECTION 1 – GENERAL DESCRIPTION ........................................................1–1
1.1. INTRODUCTION TO VITAL RELAYS .........................................................1–1
1.2. RELAY CHARACTERISTICS AND COMPONENTS...................................1–2
1.2.1. Size .........................................................................................................1–2
1.2.2. Identification ............................................................................................1–3
1.2.3. Relay Prongs and Plugboard...................................................................1–5
1.2.4. Mounting..................................................................................................1–7
1.2.5. Registration .............................................................................................1–8
1.2.6. Insulators.................................................................................................1–9
1.2.7. Terminals...............................................................................................1–10
1.2.8. Guide Rods............................................................................................1–14
1.2.9. Wiring ....................................................................................................1–14
1.2.10. Relay Contacts ......................................................................................1–15
1.2.11. Coils ......................................................................................................1–15
2. SECTION 2 – THEORY OF OPERATION........................................................2–1
2.1. GENERAL ...................................................................................................2–1
2.2. RELAY CONTACTS AND COILS................................................................2–3
2.2.1. Definitions................................................................................................2–3
2.2.2. Contact Groups .......................................................................................2–3
2.2.3. Coils ........................................................................................................2–9
2.3. BIASED-NEUTRAL TRACK RELAYS .......................................................2–13
2.4. DC LINE RELAYS .....................................................................................2–15
2.4.1. Neutral Line Relay .................................................................................2–15
2.4.2. Biased-Neutral Line Relay.....................................................................2–16
2.4.3. Magnetic-Stick Line Relay .....................................................................2–18
2.4.4. Microchron II Timer Relays....................................................................2–21
2.5. DC SPECIAL PURPOSE RELAYS............................................................2–29
2.5.1. Highway Crossing Signal Flasher Relay................................................2–29
2.5.2. Power-Transfer Relay............................................................................2–30
2.5.3. Lamp-Control Relay...............................................................................2–32
2.5.4. Switch-Overload Relay ..........................................................................2–33
2.5.5. Code-Responsive Relay........................................................................2–34
2.5.6. Code Rate Transmitter Relay ................................................................2–37
2.5.7. Code-Following, VTB Relay...................................................................2–39
2.6. AC TRACK RELAYS .................................................................................2–44
2.6.1. Vane Relay............................................................................................2–44
3. SECTION 3 – INSTALLATION.........................................................................3–1
3.1. GENERAL ...................................................................................................3–1
3.2. RELAY INSTALLATION TOOLS AND SUPPLIES ......................................3–1
3.3. INSPECTION...............................................................................................3–1
3.4. INSTALLATION ...........................................................................................3–2
P1457, Rev. Nov/07 i Alstom Signaling Inc.