Shore Power Upgrade

Since entering service in 2015, it has become apparent that the LHD’s existing shore Supply Connection Panels are insufficiently rated to support the electrical power needs of the Royal Australian Navy.

Background

McKay have been engaged to provide upgrades to the Royal Australian Navy’s shore power supply infrastructure due to obsolescence and capacity limitations issues.Since entering service in 2015, it has become apparent that the fleets existing shore Supply Connection Panels are insufficiently rated to support the electrical power needs of the Royal Australian Navy.The aim of the upgrade is to replace the existing Ship’s Shore Connection Panels (rated at either 800 Amps or 1200 Amps) with new 4 cable/plug Shore Connection Panel, manufactured that shall be able to handle 1600 Amps.

Rectification

McKay’s have been commissioned to come up with a solution to shore power deficiencies. The client had seen the shore power upgrade McKay’s had completed on HMNZS Canterbury and were impressed with the standard of work. A proposal was submitted using a similar system to HMNZS Canterbury which was accepted and implemented in a short time for NZDF. The shore power proposal was to change out existing 4 Shore Power Boxes with 4 larger capacity units. Upgrading of the main distribution system to accept this increase was also required.

Project Construction

The first shore Box was tested in a heated room of ambient temperature of 45 deg C.

Using 2 Meg watts of Generation and 1.5 Meg Watts of Load bank McKay ran 1600 amps through Shore Boxes for 8 hours monitoring heat rise.

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Generators were supplying 440volts/60Hz, connected to a JB with 4 x Shore Power leads plugged into Shore Connection Panel.  The test room was at controlled temperature. 45 Deg C- 50 Deg C.

Load bank was loaded so all Viking plugs are running at 400amps each.

  • Test 1 was run with wireless temp sensors situated in different sections of panel for temp rise monitoring with compromising IP rating of then Panel will be operational on ship. This test will run for 4 hours
  • Test 2, Panel running at full capacity and then disconnect 1 fan, monitor heat difference 2 hours.
  • Test 3, Panel running at full capacity, disconnect second Fan, monitor heat difference 2 hours.
  • Highest internal temperature when both fans disconnected 62 Deg C.
  • When both Fans working internal temperatures close to Ambient.

 

Completion

Project completed in maintenance period on time and on Budget.

Future

Another 6 Shore Connection Panels now complete and ready to install.
All DC upgrade parts have been ordered by the client for completion of over 3 stages.
Consisting of,

  • Install 6 x Shore Connection Panels.
  • Upgrade of 6 x Distribution Centers for 1600amp Shore supply capacity