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MR013694 Shenton Park Zone Substation

At Shenton Park zone substation we were contracted to install 5 new 22KV feeder cables to replace and remove the existing cables inside the area in which the new zone substation is being constructed.

Shenton Park zone Substation is a unique project in which required horizontal directional drilling 2 separate multi conduit horizontal directional drill shots underneath Live transmission main bus bars, and the removal of old cables which are intertwined with western power data cable along the route of the existing cables. To safely manage all of the potential hazards extensive planning was required during this project, and was executed safely and to the client’s satisfaction. Under the Live Transmission bus bars we needed to install 1 drill shot with 3 x 160mm conduits and another with 2 x 160, 1 x 63. During the construction under the live bus bars we had to deal through issues from mud retrieval, signal interference due to the overhead power and working under a transmission VA. All these were noted on the JRA and a risk removal process commenced to ensure it was safe for proceeding. POC mitigated these risks via:

  • Spotter
  • Vacuum hose long enough to keep machinery a minimum of 7m away from all infrastructures. Hose had to be 25m in length for Mud retrieval.
  • Nothing to be over waist height
  • Transmission Recipient in charge to Hold the Permit and act as 2nd spotter
  • No flow holes under the Live Transmission Lines
  • PPE

Throughout the rest of this project we were required to install 5 x 150mm conduits with .500mm separation and an additional 2 x 80mm communications ducts. Power On utilized its vast range of equipment throughout this process which made life easier for the construction crews on the ground. Below are some rough quantities installed on the project :

  • Drill shot Number 1 (2 x 160mm + 1x63mm)
  • Drill shot number 2 (3 x 160mm)
  • Excavate 200m
  • Install 1077m of 150mm conduit with.500mm separation
  • Haul 1115m of 400HV cable
  • Haul 259m 25mm sq cable