Publications and resources

The Electricity Industry Participation Code (the Code) requires Transpower to publish the Grid Reliability Report (GRR), Grid Economic Investment Report (GEIR) and the ten year forecast fault...

The 2015 Asset Management Plan explains how we undertake asset management and describes our plans for 16 different asset classes.

This brochure provides guidance to operating large irrigators near existing overhead high voltage transmission lines, and suggests ways to avoid electrical hazards.

This Interim Report outlines the results of the first financial year (2015/16) of the second Regulatory Control Period (RCP2).

On 11 December Transpower’s HVDC equipment suffered a bi-pole trip while transferring 90 MW to the North Island. The cause was unexpected and, while an explanation was&nbsp...

This 2014/15 Annual Regulatory Report reports on performance for the year ended 30 June 2015 and transmission...

A guide to help keep safe when working around transmission lines.  Contact your landowner liaison officer if you wish to obtain copies of safety stickers for your mobile plant or signage...

This factsheet provides an overview of our business, including financial and investor highlights.

This report describes Transpower's financial and operational performance for the financial year ending 30 June 2015.

Transpower regularly publishes a Transmission Planning Report (formerly the Annual Planning Report) which details the status of all projects that Transpower considers possible over the next...