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2008 ALSTOM Signaling Products Catalog

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Type B Series Vital Relays<br />

Contacts<br />

<br />

Contact Combinations<br />

Type B1 Relays have space for three contact groups while Type B2 Relays feature six contact group spaces:<br />

Type B1<br />

Neutral<br />

Biased-Neutral<br />

Power Transfer<br />

Light-Out<br />

2FB, 4FB, 4F-2B, 4FB-2F-1B, 6FB<br />

4FB-2F-1B, 6FB<br />

2FB, 6FB<br />

4FB, 4F-2B, 6FB<br />

Type B2<br />

Neutral<br />

Biased-Neutral<br />

Polarized<br />

12FB, 8FB-2F, 8FB-4F-2B<br />

8FB-4F-2B, 12FB<br />

4FB-4NR, 6NR, 4NR-2FB-2F<br />

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Vital Relays<br />

Contact Types<br />

Type B Relays may have regular, heavy-duty or heavy-duty with magnetic blowout contacts.<br />

Contact Type Load Material<br />

Regular 4 Amp continuous (resistive) Front: Silver-impregnated carbon to Silver<br />

Back: Silver-to-Silver<br />

Heavy Duty >4 Amps continuous (resistive) Front: Silver-impregnated carbon to Silver<br />

Range 1: < 30V<br />

Back: Silver-impregnated carbon to Silver<br />

Range 2: 30V – 175V<br />

Heavy Duty with >4 Amps continuous (resistive) Front and back contacts include magnets<br />

Magnetic Blowout Range 2: 30V – 175V to facilitate “blow-out” function when<br />

Range 3: 175V – 250V<br />

electric arc is present.<br />

T.O.C.<br />

70<br />

CALL 800.717.4477 FAX 585.274.8777

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