SoP 011 - A : System Average Interrruption Frequency Index (SAIFI) for Industrial category
3rd Quarter Year - 2010-11
Sr.
No
Month Ni - Number of Customers for each sustained interruptions (in numbers) NT - Total No of customers served
(in Numbers)
SAIFI = Ni/Nt
(Monthly SAIFI)
1 2 3 4 5= 3 / 4
1 Jul-10 59041 80469 1
2 Aug-10 152290 80469 2
3 Sep-10 93821 80469 1
SoP 011 - B : System Average Interrruption Duration Index (SAIDI) for Industrial category
3rd Quarter Year - 2010-11
Sr.
No
Month Ri =
Restoration Time for each sustained interruption event
(in hours)
Ni - Number of interrupted Customers for each sustained interruption event
(in numbers)
Ri* Ni -
Total customer interrution Duration
NT - Total No of customers served
(in Numbers)
SAIDI = Ri*Ni/Nt
(Monthly SAIDI)
1 2 3 4 5 = 3 * 4 6 7= 5 / 6
1 Jul-10 218.57 167 36409.0 80469 0.45
2 Aug-10 469.47 285 133626.1 80469 1.66
3 Sep-10 152.36 610 92962.8 80469 1.16
SoP 011 - C : Momentary Average Interruption Frequency Index (MAIFI) for Industrial category
3rd Quarter Year - 2010-11
Sr.
No
Month IMi =
Number of Momentary interruptions for the month
(in numbers)
Nmi =
Total no of customers for each momentary interruptions
(in numbers)
Imi =Nmi
Number of customer Mementary interruptions
(in numbers)
Nt -
Total no of customers served
(in numbers)
MAIFI=
Imi*Nmi/
Nt
1 2 3 4 5 = 3 * 4 6 7= 5 / 6
1 Jul-10 1328 245 324765 80469 4
2 Aug-10 1601 347 555970 80469 7
3 Sep-10 1231 264 324440 80469 4