AUXILIARY EQUIPMENT
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7-23
SIG-00-22-02 JUNE 2022 (Revised September 2022)
Version: B.1
7.6
AC Shunt, Wide-Band, 8A076A
WARNING
THE 8A076A WIDEBAND SHUNT MUST NOT BE USED TO BYPASS
INSULATED JOINTS IN DC CODED TRACK CIRCUITS, WHERE AC
OR CODED AC CIRCUITS EXIST, OR AT FEED POINT JOINTS OF
UNIDIRECTIONAL GCP APPROACHES.
WHEN ADDING OR REPLACING BYPASS SHUNTS, APPROPRIATE
TESTS MUSTS BE MADE TO DETERMINE THAT THE BYPASS
SHUNT DID NOT ADVERSELY AFFECT OTHER HIGHWAY
CROSSING WARNING SYSTEM OR WAYSIDE SIGNAL SYSTEM
TRACK CIRCUITS.
CAUTION
THE SHUNT SHOULD BE CONNECTED AS CLOSE AS PRACTICABLE
TO THE RAILS (WITHIN THE #6 AWG WIRE LEAD LENGTH) AND, TO
AFFORD MAXIMUM PROTECTION FROM PHYSICAL DAMAGE, BE
ENCASED IN A PROTECTIVE ENCLOSURE OR BURIED (EITHER
VERTICALLY OR HORIZONTALLY IN A TERMINAL SHUNT BURIAL
KIT, 62776) AT AN APPROPRIATE DEPTH. IT IS NOT NECESSARY
TO BURY THE SHUNT BELOW THE FROST LINE.
7.6.1 Equipment Description, 8A076A
The AC Shunt, Wide Band, 8A076A (see Figure 7-19), provides an effective short circuit to AC
but presents an open circuit to DC. This shunt is used to bypass insulated joints in DC track
circuits.
The AC Shunt, Wide Band, 8A076A, is housed in a hermetically sealed, cylindrical case with a
pair of 10 ft. (3.05 m) leads extending from one end.
7.6.2 Mounting Dimensions, 8A076A
Dimensions:
3.35 inches (8.5 centimeters) in diameter
7.5 inches (19.1 centimeters) in height
Weight:
7 pounds (3.18 kilograms) (approximate)
Leads:
10 ft. (3.04 m); #6 AWG, stranded, black PVC