Specifications

December 2013
REQUEST FOR PROPOSALS FOR
PURCHASE AND DELIVERY OF HEAVY-DUTY BUSES
RFP SRTA-2014-01
TECHNICAL SPECIFICATIONS
PAGE-23
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DETECTION, and SYSTEM ACTUATION electrical wiring circuits and shall
facilitate the connections of these circuits. The enclosure for the control shall be
watertight and shall be electrically non-conductive. The circuit monitor shall be
capable of either 12 or 24 VDC operation.
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b. The control shall provide indication of a NORMAL, FIRE or FAULT condition via
red and green LED's mounted behind the control enclosure front panel. Once
initiated, the circuit monitor shall remain in the FIRE or FAULT mode until the fire
suppression system is returned to a ready condition. The red LED shall be
clearly labeled "FIRE.”
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c. The circuit monitor shall also be equipped with a continuous tone audible alarm.
This alarm shall sound in both FIRE and FAULT conditions. Once the audible
alarm begins to sound it shall be capable of being silenced by depressing a
labeled ALARM SILENCE button, provided on the circuit monitor front panel.
Indication of a silenced alarm shall be provided via a labeled SILENCED
ENGAGED LED.
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14. ELECTRICAL
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The bus will be equipped with a dual voltage 24/12 V power distribution system, adequately sized
for all electrical loads on the buses as specified, including air conditioning and wheelchair ramp.
Design details of the electrical system will be reviewed with the SRTA during thr pre-production
meeting.
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14.1 Alternator and Regulator
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a. The alternator shall be sized to supply the entire nighttime operating electrical
load of the coach while providing at least 20 percent (20%) of its current output
for battery charging when the battery is fully discharged. The alternator shall be
an EMP P450, or approved equal, rated at 450 amps with an external electronic
voltage regulator.
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b. The Contractor shall provide an analysis, approved by the SRTA,
demonstrating that the alternator supplied is adequate for coach operation in the
service area of the SRTA. Alternator cooling methods shall be approved by the
SRTA.
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14.2 Battery
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a. The term battery means two or more heavy duty top quality lead acid battery
units mounted side by side in a battery compartment. The battery compartment
shall not be located in the engine compartment. Pull-out stainless steel battery
trays shall be provided. Batteries shall be by "DEKA”, or approved equal. The
configuration for the battery is two battery units size 8D, 12 volt, 6 cell and 31
plates per cell. Batteries shall be stamped with the date of manufacture.
Batteries shall not be abused or quickcharged before delivery. Batteries shall be
new when the coach is delivered to the SRTA.
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b. Despite the battery configuration stated above, the Contractor shall be
responsible for analysis of the loads and selecting a battery of adequate capacity
to supply them. Other battery configurations may be used with the prior approval
of the SRTA. Battery installation to be approved by the SRTA.