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State of Tamilnadu - Section

Section 5 in Central Electricity Regulatory Commission (Standards of Performance of Inter-State Transmission Licensees) Regulations, 2012

5. Standards of Performance.

(1)All inter-State transmission licensees shall comply with the Standards of Performance specified in these regulations:-
(a)Transmission System Availability
(i)The transmission system availability shall be calculated element-wise on monthly basis, in the same manner as provided for in the Central Electricity Regulatory Commission (Terms and Conditions of Tariff) Regulations, 2009, as amended from time to time and any subsequent enactment thereof.
(ii)The deemed availability of the transmission elements under outage shall be as specified in the Central Electricity Regulatory Commission (Terms and Conditions of Tariff) Regulations, 2009, as amended from time to time and any subsequent enactment thereof.
(iii)The element-wise monthly availability of the transmission system shall not be below the availability as given below:-
SI. No. Transmission Elements Availability (% of time)
(i) AC Transmission line 90
(ii) ICTs 90
(iii) Reactors 90
(iv) Static VAR Compensator 90
(v) Series Compensator 90
(vi) HVDC (Back-to-back Stations and bi-pole links) 85
Notes : (1) Tower collapse shall not be counted for the purpose of calculation of monthly availability of AC transmission line and HVDC bipole line.
(2)Failure of Inter-Connecting Transformer (ICT) and Reactor shall not be counted for the purpose of calculation of availability of Inter-Connectivity Transformer and Reactor.
(iv)The element-wise monthly availability shall be certified by the Member-Secretary of the Regional Power Committee.
(b)Restoration time
Restoration time for different types of failures of transmission line and Inter-Connecting Transformer (ICT) and reactors shall not exceed the following time limit:-
SI. No. Types of failures Restoration Time (Days)
1. Insulator failure  
Plain Terrain 1
Hilly Terrain 2
2. Tower after collapse by Emergency RestorationSystem (ERS) 12
3. Tower after collapse  
Plain Terrain 30
River Bed 50
Hilly Terrain 50
4. Snapping of phase conductor  
Plain Terrain 2
Hilly Terrain 3
5. Failure of earth wire  
Plain Terrain 2
Hilly Terrain 3
6. Failure of Inter Connecting Transformers (ICTs)  
Restoration of the failed ICT 120
7. Failure of Reactors  
Restoration of the failed reactor 120