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15kV main switch:

  • Load switch 15kV 600A;
    • Stored energy mechanism (MEE)
    • Provision for padlock
  • Interlock Kirk-key, between the door and the switch, to prevent opening under voltage
  • Interlock Kirk-key, between circuit breaker and switch
  • Recessed handles to prevent breakage during transport
  • Removable protection grid, to secure the changing of fuses
  • Window (safety glass) for displaying the status of the switch contacts

15kV Vacuum Circuit Breaker (VCB):

  • Maximum voltage: 15kV
  • Partial discharge level: 95k VBIL
  • Short circuit current: 29kA
  • Control module: 120VAC
  • 1x SEL751A relay protection (751001ACA3A70861C31)
  • 3x phase CTs 400:5
  • 1x CT ‘’zero sequence’’ 50:5
  • 1x PT 15kV:120V
  • The circuit breaker will trip if there is a problem with the MALT relay (SE-330) (to comply with CSA M421)


  • Nema 2 “gasketed”
  • Drip-proof housing designed for mining use
  • Cabinet cleaned with sandblasting and gray epoxy paint
  • Standard replacement parts available and easy to replace (doors, accessories, etc.)
  • Approximate dimensions and weight: to be confirmed upon design

General informations:

  • All control wiring is SIS type, as required by CSA C22.2 #31-04 “switchgear”
  • Single-line electrical plans and bilingual schematics
  • “Danger”, “Arc-flash” posters, etc.
  • CSA/ESA certification
  • Complies with CSA M421 – mines and quarries