Small Distribution Indoor Substations

DETAILS

• Engineering-design of distribution class substation [primary to secondary voltages] within a building for the express purpose of providing customer secondary metered service, where the proposed new customer loads cannot be supplied from either pad mount equipment, overhead distribution, or a network distribution system [typically built in a dense urban environment]
• Design interior building space for manual or automated dead front air or SF6 switchgear with controller to provide preferred-reserve service and even sectionalizing
• Exterior access pits [sidewalk entry below grade]
• Indoor substation design to include:
  • Substation equipment configuration
  • Switchgear and transformer space configuration with fire resistance ratings per local codes
  • Ventilation louver doors, manway doors, and emergency egress doors
  • Oil retention tank system for oil filled transformers
  • Lighting systems design
  • Cable raceway systems [conduit and cable tray]
  • Ground grid system
  • Easements for utility feeder sectionalizing and customer secondary service