Supply reliability

We maintain a high standard of reliability in our electricity network. To measure our reliability, we set supply reliability budgets each year.

These budgets are averages across all customers and give an indication of the duration and frequency of electricity interruptions an average customer might experience.

Measures

The electricity distribution industry uses three commonly accepted measures for network reliability. These are:

• CAIDI - customer average interruption duration index
  This is the average duration (in minutes) that a customer is without power when affected by an interruption to supply.
• SAIFI - system average interruption frequency index
  This represents the average number of interruptions that a customer experiences each year.
• SAIDI - system average interruption duration index
  This is the average duration (in minutes) that customers are without power each year.

Budgets

For the coming year, Evoenergy aims to deliver to its customers a service that is at least as good as shown by the following reliability figures:

In accordance with the Electricity Distribution (Supply Standards) Code, these budgets exclude interruptions of less than one minute and extended interruptions due to storms. Storms are those interruptions where 10% or more of customers in an area are affected.