SoP 011 - A : System Average Interrruption Frequency Index (SAIFI) for URBAN category
Sr.
No
Month Ni - Number of Customers for each sustained interruptions (in numbers) NT - Total No of customers served
(in Numbers)
CI= Ni SAIFI = ∑ Ni/Nt
(Monthly SAIFI)
1 2 3 4 5 6=5/4
1 Jan-18 1720971.00 2050814.00 7947800.00 3.88
2 Feb-18 1608904.00 2051227.00 5179292.00 2.52
3 Mar-18 1520715.00 2051881.00 4501001.00 2.19
  4th Qtr 4850590.00 2051881.00 17628093.00 8.59
SoP 011 - B : System Average Interrruption Duration Index (SAIDI) for URBAN category
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)
Customer Intt. Duration CMI = ΣRi*Ni SAIDI = ΣRi*Ni/Nt (Monthly SAIDI)
1 2 3 4 5 = 3 * 4 6 7 8=7/6
1 Jan-18 1:22 1720971.00 2379520:08 2050814.00 436429.10 5:06
2 Feb-18 1:31 1608904.00 2440577:26 2051227.00 322213.58 3:46
3 Mar-18 0:56 1520715.00 1429790:28 2051881.00 168245.75 1:58
  4th Qtr 3:50 4850590.00 18625246:55 2051881.00 926888.44 10:50
SoP 011 - C : Momentary Average Interruption Frequency Index (MAIFI) for URBAN category
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 Momentary interruptions
(in numbers)
Nt -
Total no of customers served
(in numbers)
Customer Intt. ΣImi*Nmi MAIFI=ΣImi*Nmi/Nt
1 2 3 4 5 = 3 * 4 6 7 8=7/6
1 Jan-18 4074.00 1824916.00 7434707784.00 2050814.00 14163265.00 6.91
2 Feb-18 2569.00 1665766.00 4279352854.00 2051227.00 8032054.00 3.92
3 Mar-18 3139.00 1732443.00 5438138577.00 2051881.00 9928406.00 4.84
  4th Qtr 9782.00 5223125.00 51092608750.00 2051881.00 32123725.00 15.66