American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 158

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METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS
DE304.09 9-153 Revision 4 : 05/09/12
Metro Baseline Re-Baseline: 04/29/10
a. Minimum contact wire heights shall be in accordance with the
requirements of the CPUC General Orders 95.
b. The contact wire height at supports shall take into consideration the
minimum heights required by the various applicable codes and
standards and installation tolerance (including track construction and
maintenance tolerances).
9. Clearances
a. Electrical clearances between the OCS and other facilities shall be in
accordance with CPUC General Order 95.
b. Mechanical clearances between the OCS and other facilities shall be in
accordance with CPUC General Order 143A.
c. For vehicle-related clearances full allowance shall be included for
dynamic displacement of the vehicle under operating conditions
(including track and other installation and maintenance tolerances).
d. The following clearances shall be maintained between live conductors
(including pantograph) and any grounded fixed structures in accordance
with the AREA Manual (Chapter 33, Part 2) as follows:
Passing
Static
Normal 4" 6"
Absolute Minimum 3" 5"
e. Passing clearance is the clearance between the Catenary system or
pantograph and an overhead structure during the short time it takes the
power unit(s) of a train to pass.
f. Static clearance is the clearance between the Catenary system when not
subject to pantograph pressure, and the overhead structure.
10. Pantograph Clearance Envelope
A pantograph clearance envelope shall be developed for application on all
tracks including superelevation, for worst case track conditions and full
vehicle roll plus a 6 inch mechanical clearance. No equipment, except OCS
steady arms attached to the contact wire, shall intrude into the pantograph
clearance envelope.
11. Construction and Maintenance Tolerance
Design of the OCS shall be based upon a total construction-plus-
maintenance tolerance for the lateral and vertical locations of the structures
as follows:
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