Request for Amended Advice Agency Response_Energex_Council CDA_01-04-2020

        J&P Richardson Industries Pty Ltd       -3-


2.0     THE TRANSMISSION LINES

2.1     Transmission line alignment and route

2.1.1   Network connections
        The ENERGEX easement crossing the Noosaville property contains a double circuit
        concrete and lattice steel tower lines supporting conductors energised at 132kV.The
        associated circuits form part of the ENERGEX North Coast sub transmission network.

        As shown in Figure 2 below, the two circuits provide a 132kV connection from SSSRH
        Sunrise Hills substation to SSNVL Noosaville substation. When the lines were constructed
        (around 1983) they ran from Cooroy to Noosaville directly (as F796 and F797) – being later
        cut into SSSRH.

        There is no 132kV distribution bus at SSNVL – each feeder terminates directly onto the
        primary side of a 132kV/11kV transformer. The 11kV SSNVL bus is also normally open,
        meaning that the two 132kV feeders do not operate in strict parallel (the loads can be
        different).

        Figure 2       Part of North coast 132kV sub-transmission network




2.1.2   Line / structure description F7298/790
        Intermediate line structures are of concrete monopole construction incorporating composite
        offset post insulation. An additional standoff bracket has been added between the pole and
        insulator base to provide a climbing corridor on the structure.

        Lattice steel towers appear to have been used on strain structures.

        The line is a dual circuit six conductor configuration (single 37/3.00 AAC “SATURN”
        conductor per phase) with single overhead 18.2mm “Cossonay” (OHEW) earth wire. The
        lines have previously been phased for the minimum field arrangement (diagonal phasing).

        From ENERGEX records the design temperature of the 132kV lines was 80°C.


        Hollett Road EMF Study                                                      V1.0