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Major Projects

Transmission Gully - Overhead Line relocation - SH1 Paekakariki

Recently Electra carried out a project on SH1 in Paekakariki for CPB HEB Joint Venture to relocate 11kV and 33kV lines to make way for the new Transmission Gully motorway.  The job consisted of installing 7 new poles and associated lines in strategic locations to avoid the existing motorway, the new motorway and the temporary bypass road. 

In preparation for the shutdown night, 5 intermediate poles and lines were installed at night to enable the Transmission Gully works to continue during the day.  This work was completed in terrible weather conditions but the excellent efforts of the team allowed the work to progress on schedule.

Shutdown Night

The shutdown night consisted of replacing two poles next to the current highway and running the new lines across the road.  This required lane closures and at times complete closures of SH1.  In addition, the existing lines were to be isolated and generators were required to maintain power.            

In order to complete the work on time two teams were used – one at each site.  It was always going to be a big night for the teams but to add to the complexity on the night we were informed of a wide load coming through SH1 and all the trucks, cranes and traffic management would have to be removed while the load passed.  Despite the interruption to the work, the teams worked very well and completed the work as planned.  

It was a great team effort by everyone involved including the CPB HEB Joint Venture designers, stores, project management, installation teams and the two contractors Tatana Contracting Ltd and Banks Engineering.

Advanced Distribution Management Systems (ADMS)

We have enabled the automatic generation of outage messages to those calling in on the 0800 LOST POWER number.

If the caller is believed to be part of a current outage, the system will play them a message of the known faults in the area and the expected restoration time.  Customers can still talk with the call answering team at Electra Services at any stage. 

Upcoming activities include rolling-out a new version of the of Customer Mobile App and the Web Outage Viewer.

Otaki River Crossing

A span of 33kv and 11kv lines across Otaki river required the support structure on the northern side of the river to be replaced.

The existing 3 Pole Structure was converted to a stronger Double H-Pole structure.

With the structure upgrade we took the opportunity to remove an existing Aerial Stay that had some ground clearance issues in the past. This stay is within the area where heavy mobile plant and machinery are operational at the Quarry in Otaki.

The shutdown for this upgrade provided us an opportunity to undertake other 33kV Pole and cross-arm replacements that had been scheduled for this Financial year.

As a contingency, Generators were provided to keep power on at the Wastewater site and engineering workshop nearby.

 

 Transmission Gully work2

 

Improving network reliability in Paraparaumu Beach

Earlier this month, Electra invested $90,000 installing a new 11kV switch on Olive Terrace, Paraparaumu to improve reliability of supply to Paraparaumu. This switch will allow transformer maintenance to be completed without interrupting supply to the surrounding areas. 

During the change over to the switch it was necessary to cut supply to 338 properties (128 properties were supplied by generators) making this one of the largest planned outages this year.

During the outage the cable jointers completed 4 underground joints, connecting the cables from existing transformers W147 (Olive Terrace); W97 (Olive Terrace); W98 (Manly Street) and W121 (Te Kupe Road).

Traffic management was in place on the T section of Olive terrace whilst the jointing was being completed in the road.  Fortunately, the weather conditions were good allowing the construction works to proceed to plan.