Periodical Overhauling of 7 Nos. ABB make 145 KV double pole SF- 6 Circuit Breakers ( Thakurli TSS- 5nos, Thakurli power house- 1 No., Vangni TSS- 1 No ) and 7 Nos. 25 KV single pole SF- 6 interrupters ( Thakurli TSS- 1 No, Titwala- 1 No., Igatpuri- 1 No, Lonavala- 1 No., Upper Bhor Ghat- 1 No., Karjat TSS- 2 Nos. ) of Kalyan & Lonavala district in Mumbai of Central Railway.