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Wastewater Treatment

Lex engineering has successfully completed several electrical engineering design projects and studies at various raw and wastewater treatment plants throughout the Metro Vancouver Regional District in BC with the goal of improving reliability by providing state of the art protection relaying and automation.

Lex is closely involved with clients for planning upgrade work with minimum interruption to the existing system and plant processes during the changeover from existing to the new system. Lex is well versed with utility interconnection requirements for load only distribution systems as well as with power generation systems.


  • MV and LV switchgear
  • Protection and control schemes
  • Utility connection and liaison
  • Backup power generation and utility interconnection


  • Power System Studies
    • Load flow
    • Short Circuit
    • Protective device coordination
    • Arc Flash
    • Power Quality
    • Motor Start-Up
    • Harmonic analysis and filter design

Sample projects:

Iona Island Waste Water Treatment Plant

  • Plantwide relay co-ordination study
  • Direct transfer trip installation and minimum import relay removal
  • Replacement of 15kV and 5kV switchgear
  • Feasibility study for backup power diesel generator interconnection
  • Harmonic analysis for VFD replacement

Northwest Langley Waste Water Treatment Plant

  • Replacement of existing 25kV Substation with new 25kV E-house

Capilano Raw Water Pumping Station

  • Backup power generator interconnection
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