At the time of creation of J.S.E.B. (Erstwhile) in 2001, the total transformation capacity was 1435.45 MVA of 220 kV and 132 kV Class in 18 GSS supported by 1502.7Km. (2122 CKm) Transmission Line. Over the years, new GSS and transmission lines have been constructed and augmentation of existing GSS has also been done.

Presently, the Company owns and operates about 4650.17ckm of transmission lines at 400 kV, 220 kV, 132 kV level and 42 nos. (Till January 2020) of Substations with transformation capacity of 6505MVA.

JUSNL  Grid Substations (No.)

As on Mar’ 13 As on Mar’ 14 As on Mar’ 15 As on Mar’ 16 As on Mar’ 17 As on Mar’ 18 As on Mar’ 19 As on Mar’ 20 As on Nov’ 21
400/220 kV - - - - - -     -

220/132 kV  or 4 4 4 6 6 6 6 8 12
220/132/33 kV
132/33 kV 22 25 25 26 30 33 34 35 39
Total No. of GSS 26 29 29 32 36 39 40 42 51

JUSNL  Transformation Capacity (MVA)

As on Mar’ 13 As on Mar’ 14 As on Mar’ 15 As on Mar’ 16 As on Mar’ 17 As on Mar’ 18 As on Mar’ 19 As on Mar’ 20 As on Nov’ 21
400/220 kV - - - - - - -

220/132 kV 1620 1620 1620 2000 2000 2000 2000 3120 4620
132/33 kV 2050 2350 2350 2450 3295 3555 3655 3785 4185
Total Transformation Capacity (MVA) 3670 3970 3970 4770 5295 5555 5655 6905 8805

JUSNL Transmission Line Length (CKM)
Voltage level As on Mar’ 13 As on Mar’ 14 As on Mar’ 15 As on Mar’ 16 As on Mar’ 17 As on Mar’ 18 As on Mar’ 19 As on Mar’ 20 As on Nov’ 21
400 Kv 180 180 180 180 180 180 180 180 180
220 kV 597 845 845 995 995 1081 1081 1395 1853
132 kV 1647 1781 1781 1899 1967 2378 2742.26 3156 3273
Total Transmission Lines (CKM) 2424 2806 2806 3074 3142 3639 4003.26 4731 5306