Source: Wikipedia, the free encyclopedia.
The Average Service Unavailability Index (ASUI) utilities
. It is calculated as
ASUI
=
∑
U
i
N
i
∑
N
i
×
8760
=
1
−
ASAI
{\displaystyle {\mbox{ASUI}}={\frac {\sum {U_{i}N_{i}}}{\sum {N_{i}}\times 8760}}=1-{\mbox{ASAI}}}
where
N
i
{\displaystyle N_{i}}
is the number of customers and
U
i
{\displaystyle U_{i}}
is the annual outage time (in hours) for location
i
{\displaystyle i}
. ASUI can be represented in relation to SAIDI (where annual SAIDI is given in hours) as
ASUI
=
SAIDI
8760
{\displaystyle {\mbox{ASUI}}={\frac {\mbox{SAIDI}}{8760}}}
References
. Retrieved 21 July 2011 .
Generic Electricity distribution Electricity generation
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