AUXILIARY EQUIPMENT
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7-39
SIG-00-22-02 JUNE 2022 (Revised September 2022)
Version: B.1
7.11 SSCC III Lighting Surge Panels, 91170-1 and 91181-1
WARNING
ANY ALTERNATIVE SURGE PROTECTION DEVICE MUST BE
ANALYZED TO ENSURE THAT FAILURE MODES OF THE DEVICE
DO NOT COMPROMISE THE SAFETY OF GCP5000 GCE SYSTEM,
I.E., CROSSES & GROUNDS.
The SSCC IIIi Lighting Surge Panels provide external I/O primary surge protection for the 80405
Solid State Crossing Controller IIIi (SSCC IIIi) module and grade crossing gate controller
circuitry.
The 91170-1, Figure 7-31 provides common return gate control. The 91181-1, Figure 7-32
provides isolated gate control Both Surge Panels have built-in secondary surge protection for all
external I/O.
7.11.1 Lighting Surge Panel Description
The SSCC III Lighting Surge Panels provide:
•
Arresters and equalizers for surge protection
•
Standard AREMA binding posts for cable connections to the flashing lights, gates,
and bells
•
Gate battery circuit protection
•
Insulated links in the underground cable connections. These allow quick circuit
isolation for testing and measurements without disarranging cable circuits
•
Adjustable resistors in the
NEAR GATE
Lamp 1 (
L1
) and Lamp 2 (
L2
) circuits.
These provide compensation for different wire lengths (cabling) to the crossing
flashing lamps as well as compensate for unequal voltage drops between the two
lamp cables
•
Steering diodes for the Crossing Controller Gate Control output to provide gate
control circuit isolation.