The System Average Interruption Frequency Index (SAIFI) is commonly used as a reliability index by electric power utilities. This index measures the average number of times that a system customer …

Jun 13, 2025 · SAIFI is defined as the average number of interruptions per customer per year. It is a measure of the frequency of power outages experienced by customers. A lower SAIFI value …

SAIFI (System Average Interruption Frequency Index) represents the average number of times a customer experiences an outage during the year. SAIFI is calculated by dividing the total number of …

Jun 2, 2025 · SAIDI reflects the average total duration of interruptions for each customer served, while SAIFI measures how often the average customer experiences an interruption.

Oct 4, 2025 · Calculation of electrical reliability index: Understand SAIDI, SAIFI, and CAIDI metrics to assess outage frequency, duration, and system performance.

Aug 18, 2024 · Among these metrics, the System Average Interruption Duration Index (SAIDI) and System Average Interruption Frequency Index (SAIFI) are prominently utilized. SAIDI measures the …

System Average Interruption Frequency Index (SAIFI) measures how frequently the typical customer has a power outage over a given period—typically one year. A lower SAIFI indicates fewer interruptions.

Jun 13, 2024 · The unit of measure for SAIFI is power interruptions per customer. A lower SAIFI value indicates better reliability, as it means customers experienced fewer interruptions on average.

SAIFI (System Average Interruption Frequency Index): While SAIDI focuses on how long outages last, SAIFI looks at how often they happen. If the SAIFI score is 1.5, it means that, on average, customers …

Learn about SAIFI, SAIDI, and MAIFI, key reliability indices for electrical distribution systems. Understand their calculation and application.