A Closer Look at the Tunnel Fire Ventilation Fan Motors Power System and Control Design

Tunnel fire ventilation fans for rail transit systems must operate reliably during a fire emergency situation. Such a reliable operation depends upon the initial design factors, which are well established by industry standards and are therefore part of the design criteria for the designer. The question is to what extent do we comply with the design requirements of such standards? This paper reviews an actual design of a medium voltage power system consisting of switchgear, motor starters, and associated fan motor control logic. A close review of the fan motor protection and control logic indicates that the designers bypass the entire motor protection features in an attempt to bypass only the thermal overload function, which is required for compliance with NFPA 130 requirements. This paper provides design solutions for the fan motor protection and control logic to meet NFPA 130 requirements without bypassing the motor short circuit and ground fault protection. Recommendations for an optimized, reliable power system design and to enhance the capability of a motor protection relay (MPR) are included in the paper.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References;
  • Pagination: 7p
  • Monograph Title: Rail Conference 2009 Proceedings

Subject/Index Terms

Filing Info

  • Accession Number: 01157701
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 2 2010 12:22PM