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Type B Vital Relays - Alstom

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Theory of Operation<br />

2.3. BIASED-NEUTRAL TRACK RELAYS<br />

All biased-neutral track relays (B1 and B2) have normal pickup and release timing<br />

characteristics. Figures 2–10 and 2–11 illustrate typical B1 biased-neutral relays.<br />

Figure 2–10. <strong>Type</strong> B1 Biased-Neutral Relay, Pre-1991 Cover<br />

Figure 2–11. <strong>Type</strong> B1 Biased-Neutral Relay, Post-1991 Cover<br />

P1457, Rev. Nov/07 2–13 <strong>Alstom</strong> Signaling Inc.

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