Common use of Shunt Reactors Clause in Contracts

Shunt Reactors. 2.2.1 (765/√3) kV Single Phase Shunt Reactor 110 MVAR, 765/√3 kV, 1-Phase Reactor (including arrangement for 3-phase bank formation of 330 MVAR) shall conform to CEA’s “Standard Specifications and Technical Parameters for Transformers and Reactors (66 kV and above voltage class)” as amended up to date available on CEA website. Spare 1-phase Shunt Reactor unit shall be placed and connected in such a way that the spare unit can be utilized for all the bus and switchable line reactor banks (including for future reactor banks) without its physical movement. Neutral Grounding Reactor and Surge Arrester for 765 kV Line Reactors (as applicable): The neutral of the line reactors (wherever provided) shall be grounded through adequately rated Neutral Grounding Reactors (NGR) to facilitate single phase auto-reclosure, provided that the NGR shall be provided with suitable bypass arrangement so that the line reactor can be used as bus reactor as and when required. The neutral of bus reactor shall be solidly grounded. NGR shall be oil filled or dry type air core for outdoor application. NGR shall conform to CEA’s “Standard Specifications and Technical Parameters of Transformers and Reactors (66 kV and above voltage class)”. as amended up to date. Technical parameters of NGR shall be as specified in Annexure-A of the above-mentioned document. The surge arresters (rated voltage of arrester in co-ordination with ohmic value of NGR shall be decided by the TSP) shall be provided and physically located between the neutral of shunt reactor (brought out at 145kV class bushing) and neutral grounding reactor. The surge arresters shall be of Station Medium (SM) class duty gapless Metal oxide (ZnO) type conforming in general to IEC-60099-

Shunt Reactors. 2.2.1 (765/√3) kV Single Phase Shunt Reactor 110 MVAR, 765/√3 kV, 1-Phase Reactor (including arrangement for 3-phase bank formation of 330 MVAR) shall conform to CEA’s “Standard Specifications and Technical Parameters for Transformers and Reactors (66 kV and above voltage class)” as amended up to date available on CEA website. Spare 1-phase Shunt Reactor unit shall be placed and connected in such a way that the spare unit can be utilized for all the bus and switchable line reactor banks (including for future reactor banks) without its physical movement. Neutral Grounding Reactor and Surge Arrester for 765 kV Line Reactors (as applicable): The neutral of the line reactors (wherever provided) shall be grounded through adequately rated Neutral Grounding Reactors (NGR) to facilitate single phase auto-reclosure, provided that the NGR shall be provided with suitable bypass arrangement so that the line reactor can be used as bus reactor as and when required. The neutral of bus reactor shall be solidly grounded. NGR shall be oil filled or dry type air core for outdoor application. NGR shall conform to CEA’s “Standard Specifications and Technical Parameters of for Transformers and Reactors (66 kV and above voltage class)”. as amended up to date. Technical parameters of NGR shall be as specified in Annexure-A of the above-mentioned document. The surge arresters (rated voltage of arrester in co-ordination with ohmic value of NGR shall be decided by the TSP) shall be provided and physically located between the neutral of shunt reactor (brought out at 145kV 145 kV class bushing) and neutral grounding reactor. The surge arresters shall be of Station Medium (SM) class duty gapless Metal oxide (ZnO) type conforming in general to IEC-60099-IEC-60099-4. The arresters shall be hermetically sealed units, of self-supporting construction, suitable for mounting on structures. The Ohmic value of NGR for Line Reactors shall be as follows: Sl. No. Line Name NGR value

Shunt Reactors. B. 2.2.1 (765/√3) kV Single Phase Shunt Reactor 80 MVAr and 110 MVARMVAr, 765/√3 kV, 1-Phase Reactor (including arrangement for 3-phase bank formation of 240 MVAr and 330 MVARMVAr, respectively) shall conform to CEA’s “Standard Specifications and Technical Parameters for Transformers and Reactors (66 kV and above voltage class)” as amended up to date available on CEA website. Spare 1-phase Shunt Reactor unit shall be placed and connected in such a way that the spare unit can be utilized for all the bus and switchable line reactor banks (including for future reactor banks) without its physical movement. Neutral Grounding Reactor and Surge Arrester for 765 kV Line Reactors (as applicable): The neutral of the switchable line reactors (wherever provided) shall be grounded through adequately rated Neutral Grounding Reactors (NGR) to facilitate single phase auto-reclosure, provided that the NGR shall be provided with suitable bypass arrangement so that the switchable line reactor can be used as bus reactor as and when required. The neutral of bus reactor shall be solidly grounded. NGR shall be oil filled or dry type air core for outdoor application. NGR shall conform to CEA’s “Standard Specifications specifications and Technical Parameters technical parameters of Transformers transformers and Reactors reactors (66 kV and above voltage classVoltage Class)”. , as amended up to date. Technical parameters of NGR shall be as specified in Annexure-A of the above-mentioned document. The surge arresters (rated voltage of arrester in co-ordination with ohmic value of NGR shall be decided by the TSP) shall be provided and physically located between the neutral of shunt reactor (brought out at 145kV 145 kV class bushing) and neutral grounding reactor. The surge arresters shall be of Station Medium (SM) class duty gapless Metal oxide Oxide (ZnO) type conforming in general to IEC-60099-IEC-60099-4. Arresters shall be hermetically sealed units, of self-supporting construction, suitable for mounting on structures. The Ohmic value of NGR for Line Reactors shall be as follows: Sl. No. Line Name Substation Name NGR value (Ohm) 1. Installation of 1x240 MVAr switchable line reactor on each ckt at Kandla (GIS) end of Halvad – Kandla 765 kV D/c line Kandla (GIS) S/s 500-Ohm