On this page:
- Interconnection Asset reports
- Interconnection asset capacity updates
- Grid asset updates
- Asset operational limitations
- Network diagrams
- Relay and instrument diagrams
- Single line diagrams
Capacity and grid configuration, and availability and reliability
Our latest report pursuant to the Electricity Industry Participation Code 12.118, and the availability and reliability report published under 12.127 (refer page 37 onwards of the report):
- Brownhill - Pakuranga cable remediation - for more background and up to date information on this work, kindly refer to the project page here
Our electricity transmission network includes a number of special protection schemes. Our latest information on each scheme is available here.
The Network Diagrams include NIPS, SIPS, SPD Drawings and Substation Locators and are contained within the System Operator section of our website.
Relay and Instrument Diagrams are for individual substations and show a high level of detail. These are available on our MyTranspower portal. Log in or register here.
Note: Some of the latest relay and instrument information may be used for information purposes only. These will be stamped "Uncontrolled Copy". These should be used with caution and only when information is required for switching, and making safe other operational actions that can affect personnel safety or power system security.
The Transpower regional Single Line Diagram defines Transpower and our customer asset ownership/operational control boundaries and connect groups of substations. These diagrams have guideline status only.
The Transpower substation Single Line Diagram (Operating) defines Transpower's operational assets (and customer operational assets where the SLD is of mutual interest). Only the Operating SLDs must be used for reference required for switching, making safe and other operational actions that can affect personnel safety or power system security.
Single Line Diagrams are updated within a month of the changes occurring on site.
These are available on our MyTranspower portal. Log in or register here.