American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 58)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-53 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

9.4.2.19.2 Equipment Location

Signal equipment shall be located along the wayside only where necessary. All other

equipment shall be located on the outer edge of the right-of-way, in easily accessible

equipment housings.

Signal houses shall be provided with a fire and intrusion detection system.

Signal masts, grade crossing gates, flasher masts, cantilever signal masts and all concrete

signal structures shall follow CPUC GO 75 and City requirements for these structures.

9.4.2.19.3 Equipment Housings

All signal equipment housings shall include all required environmental controls to facilitate

maintenance and operation, including any necessary heating, ventilation and air

conditioning. The signal equipment shall be capable of operation in the event of a failure of

any environmental control subsystems. Houses, cases and junction boxes shall be steel or

aluminum. Signal houses and cases containing electronic equipment shall be coated with

reflective paint.

All equipment-housing openings shall be screened or sealed to prevent entry of animals and

insects to the extent practicable. All entryways shall be sealed following installation of

cables and wiring entering the housing.

All insulation material used to line the interior of equipment housing walls, doors and roofs

shall be flame retarding and non-electrically conductive, and shall not introduce a hazard of

any type.

Doors of housings shall be capable of being secured by a standard padlock and equipped

with a weatherproof seal.

All equipment housings shall be designed to accommodate possible future expansion of

equipment space by 30%.

9.4.2.19.4 Security of Equipment

All signal equipment housings, cases, junction boxes, switch mechanisms, and signals shall

be secured with an appropriate security device.

9.4.2.19.5 Maintainability

The signaling equipment shall be designed and constructed to facilitate quick and easy

troubleshooting and module replacement. The design shall require a minimum of testing

following module replacement.

Built-in indicators or meters shall be provided for routine maintenance, testing, and

diagnostic purposes. The use of plug-in devices, such as laptop computers for the

downloading of data from devices, including microprocessor interlockings, shall be allowed

in addition to a basic set of fault indicators. As a minimum, LED indicators shall be provided

for circuit boards to indicate the health status of a circuit board. A failed indication shall

signify to a maintainer that the board should be replaced.

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American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 58