Scope of Work
- Replacement of two main power transformers rated 60/80/100 MVA, 115/14.2 kV
- Reconfiguration of the 115 kV switchyard to allow connection of new 60/80/100 MVA transformers
- Replacement of existing 145 kV disconnect switches with new ones
- Connecting the secondaries of new transformers to the existing switchgear with new 2×2500 kcmil cable
- Removal of existing 15 kV, 1750 kcmil PILC cables
- Replacement of all 115 kV bus work
- Replacement of the AC SS transformers and the associated manual transfer scheme
- Replacement of existing 125 V DC battery systems
- Supply, Installation and testing of 30 protection and control racks
- Upgrade of the grounding system to meet short circuit level of 40 kA
- Replacement of existing 15 kV, 1750 kcmil PILC cables for supply of capacitor banks
- Installation of spill containments, fire barrier and noise attenuation measures around the transformers
- Installation of foundations and steel structures as required for installing new equipment
- Replacement of A and B transformer protections, gas protection, tap changer control, trip and sustained alarms and replacement of associated cables
- Replacement of line protections.
- Replacement o fHV breaker protection and control with new duplicated protection.
- Replacement of LV transformer and tie breaker failure and reclosing modules and provide new control.
- Replacement of LV capacitor protection modules and provide new control.
- Provide control system modifications associated with the addition of new transformers T1 and T2.
