IEEE 1628-2009 pdf download IEEE Recommended Practice for Maintenance of DC Overhead Contact Systems for Transit Systems
、Requirements of federal, state, provincial, or local regulations should be observed. If any conflict existsbetween this recommended practice and the rules established by the owner of the transit system, the ownershould determine and confirm which rules should take precedence.
2 Normative references
The following referenced documents are indispensable for the application of this document (i.e., they mustbe understood and used, so each referenced document is cited in text and its relationship to this document isexplained). For dated references, only the edition cited applies. For undated references, the latest edition ofthe referenced document (including any amendments or corrigenda) applies.
Accredited Standards Committee C2-2007, National Electrical Safety Code(NESC)1.2
ASTM D120-09,Standard Specification for Rubber Insulating Gloves
3. Definitions
For the purposes of this document, the following terms and definitions apply. The IEEE StandardsDictionary: Glossary ofTerms & Definitions should be referenced for terms not defined in this clause.”
contact wire: The conductor that is in “contactwith the pantograph collector head or trolley pole collectorshoe through which the vehicle draws current. Trolley wire is synonymous with contact wire, but is theterm used mainly by streetcar systems and rubber-tired ETB systems using trolley poles.
messenger wire: Used in many applications as a supporting wire, e.g., utility insulated cable distributionsystems frequently use an uninsulated, galvanized, stranded steel wire to support the cable. The messengerwire in catenary styles supports the contact wire both mechanically and electrically, since it is part of thecurrent-carrying conductor system.
pantograph: A spring-loaded, linked framework mounted on top of the rail vehicle or streetcar. whichmoves in a vertical plane to accommodate changes in the height of the contact wire and is the mechanismthrough which power for the vehicle is collected from the contact wire distribution system.
trolley pole: A hinged,spring-loaded pole, mounted on top of ETB cars and streetcars, with either acollector shoe or wheel collector at the upper, outer end, through which power for the vehicle is collectedfrom the contact wire distribution system.
3.1 Qualified person
A person who, by reason of instruction, training, and experience, is familiar with high voltage circuits andOCS equipment and has demonstrated familiarity with the work to be performed and the hazards involved.