REGD NO.DL 3300499

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2 · SLDC shall report to the State Grid Code Review Committee, instances of serious violation of any provisions of the SGC and incidences of persistent non-compliance of the directions of the SLDC issued in order to exercise supervision and control required for ensuring stability of grid operations.

3 · Consistent failure to comply with the State Grid Code provisions may lead to disconnection of the User's plant and or facilities from the grid. The responsibility for the consequences of disconnection including payment of damages and compensation to consumers rests with the User who consistently violates the State Grid Code.

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1 · Under the terms of the State Grid Code, STU will receive information from Users relating to their intentions in respect of their Generation or Supply businesses.

2 · STU shall not; other than as required by the State Grid Code, disclose such information to any person other than Central or State Government without the prior written consent of the provider of the information:

1 · 10 Directives The appropriate Government may issue policy directives in any matter to STU or SLDC as the case may be, to take such measures as may be necessary

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2 · No part of the State Transmission System shall be deliberately isolated from the integrated grid except under the following conditions; Under emergency conditions in which such isolation would prevent a total grid collapse and or would enable early restoration of power supply (ii) When serious damage to a costly equipment is imminent and such isolation would prevent it and (iii) When such isolation is specifically instructed by SLDC. 3 In case of isolating of any important element of the STS under an emergency situation, the same shall be intimated to SLDC at the earliest possible time after the event. 4_ Complete synchronization of grid shall be restored as soon as the conditions permit it: The restoration process shall be supervised by SLDC. 5. Any - tripping, whether manual or automatic of transmission lines of 66 KV and above or power transformers of 66 KV shall be promptly reported to the SLDC at the earliest along with the reasons for such tripping and the likely time

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7 · 6 Transmission Line Requirements

7 · 7 Transformer Requirements

7 · 8 Sub-Station Fire Protection Adequate precautions shall be taken and protection shall be provided against fire hazards to all apparatus and other assets confirming to relevant Indian Standard Specification and provisions in L.E. Rules: The fire fighting equipment installed shall be maintained in good working condition and shall be inspected daily and recorded in the maintenance logbook by the concerned in charge person. The single line schematic diagram of the five protection arrangement shall be displayed in the sub-station control room.

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10 · 2 Outage Planning Process

10 · 3 Annual Outage Planning 1 . Scheduled outage of power stations of capacity 10 MW & above and EHV lines as notified by SLDC from time to time, will be subject to annual planning:

2 · SGS and CPPs connected to the State Grid shall furnish their proposed Outage programme for the next financial year in writing by 15th November each year.

3 · SGS outage programme shall contain details like identification of unit, reason for outage, generation availability affected due to such outage, outage start date and duration of outage. SLDC shall review the outage programme received from SGS on monthly basis to chalk out the outage of the State Transmission System.

6 · Scheduled outage of power stations of capacity 10 MW and above, of all EHV lines and HV lines forming interconnection between two EHV substations (and these notified as such by SLDC) shall be approved by SLDC, 24 hours in advance based on prevalent operating conditions:

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2 · STU and User shall obtain approval of SLDC prior to availing the outage.

3 · Where interruption of power supply is caused to Consumers due to availing the planned outage, the Distribution Licensee shall obtain the prior approval of the Commission and also give prior information to the consumers by publishing in the daily newspaper regarding the interruption of supply timings.

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1 · SLDC shall efficiently handle the following types of contingencies and restoration of system back to normal: Partial system blackout in the state due to multiple tripping of the Transmission lines emanating from power stationslsub-stations Total black out in the statelregion System islands System split

2 · Diesel generating (DG) sets of sufficient capacity shall be provided at each power station to meet the start-up power: 3 Synchronizing facility shall be available at all power stations and 220 KV, 132 KV, 110 K and 66 KV sub-stations having inter-connection with Inter State Transmission System: 4_ In case of partial blackout in the systemlstate , priority is to be given for early restoration of power station units, which have tripped. 5_ In case of total regional blackout; SLDC shall CO-ordinate and follow the instructions of Regional Load Despatch Centre (RLDC) for early restoration of the entire grid. 6_ For safe and fast restoration of supply, SLDC shall formulate the proper sequence of operations for major generating units, lines, transformers and load within the state. The sequence of operations shall include opening, closing/tripping of circuit breakers, isolators, on-load tap-changers etc:

11 · 3 Restoration Procedure

11 · 4 Special Considerations applicable to contingency planning (1) During the process of restoration of the State Transmission System or Regional System blackout conditions, the normal standards of voltage and frequency need not be insisted and may left to the discretion of the SLDC. (2) Distribution Licensees shall separately identify non-essential loads, which may be kept off during system contingent conditions. They shall also draw up an appropriate schedule with corresponding load blocks in each case_ The non-essential loads can be put on only when system normalcy is restored or as advised by SLDC. (3) AIl Users shall pay special attention in carrying out the procedures to prevent secondary collapse of the system due to undue haste or inappropriate loading operation of conditions: (4) Despite the urgency of the situation, prompt and complete logging of all operations and operational messages shall be ensured by all Users to facilitate subsequent investigation into the incident and reviewing of the efficiency of the restoration process. Such investigation shall be conducted after the incident; and placed before the Grid Code Review Committee in its next meeting:

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12 · 3 Procedure to work on Inter User Boundary Circuits

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13 · 2 Reportable Events 1. AIl events in the State Transmission System having an operational effect on the User's system shall be reported by the STU to SLDC and to Users whose systems are affected. 2 All events in the User's system having an operational effect on the State Transmission System shall be reported by the User to the STU and SLDC and who in turn shall intimate the other Users on whose system the event may have an operational effect: 3 Any of the following incidents events that could affect the State Transmission System requires reporting: a Exceptionally high low system voltage or frequency: b_ Serious equipment problem relating to major circuit breaker, transformer or bus bar. C Failure of major Generating Unit: d_ System split;, State Transmission System breakaway or Black Start. e Tripping of transmission Line, ICT (Inter connecting transformer) and capacitor banks. f_ Major fire incidents. g Major failure of protection equipment: h_ Equipment and Transmission Line overload. 1. Accidents-Fatal and Non-Fatal. J: Load Crash Loss of Load k Excessive drawal deviations: Minor equipment alarms

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13 · 4 Reporting Form

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14 · 2 General SLDCs shall have the total responsibility for Scheduling despatching generation of State Generating Stations (including generation of their embedded licensees); (ii) Regulating the demand in its control area, (iii) Scheduling their drawal from the ISGS (within their share in the respective plant's expected capability) (iv) Permitting long term, medium term and short term open access transactions for embedded generators consumers, in accordance with the contracts, and Regulating the net drawal in their control area from the regional grid in accordance with the respective Regulations of the CERC. The following specific points shall be taken into consideration while preparing and finalizing the schedules: 1_ SLDC will issue despatch instructions required to regulate all generation and imports according to the 15-minute day ahead generation schedule. In the absence of any despatch instruction by SLDC, SGS can generatel export according to the day- ahead generation schedule and intimate the same to the SLDC to regulate the supply for the needy Users. 2_ The SLDC shall regulate the overall state generation in such a manner that generation from following types of power stations having energy potential, if unutilized, goes waste shall not be curtailed: i) Run of river (without storage) or canal based hydro stations: ii) Run of river with pondage and storage type hydro-stations when water level is at peak reservoir level or expected to touch peak reservoir level as per inflows: iii) Wind and Solar based generating sources 3_ Despatch instructions to SGS shall be communicated in standard format by SLDC.

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15 · 2 Scope

15 · 3 Applicability

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15 · 6. Ownership of meters

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15 · 8 Accuracy Class of meters

15 · 9 Installation of meter 1) Generating company or STU, as the case may be, shall examine, test and regulate all meters before installation and only correct meters shall be installed:. 2) The meter shall be installed at locations, which are easily accessible for installation, testing, commissioning, reading; recording and maintenance. 3) In case CTs and VTs form part of the meters, the meter shall be installed as near the instrument transformers as possible to reduce the potential drop in the secondary leads.

15 · 10 Operation; Testing and Maintenance of meters The operation, testing and maintenance of all types of meters shall be carried out by the generating company or the STU, as the case may be.

15 · 11 Access to meter The owner of the premises where, the meter is installed shall provide access to the authorized representative(s) of the STU for installation, testing, commissioning; reading and recording and maintenance of meters

15 · 12 Sealing of meters 1) Sealing Arrangements a) All meters shall be sealed by the manufacturer at its works. In addition to the seal provided by the manufacturer at its works, the sealing of all meters shall be done as follows at various sealing points as per the standards given in the Schedule annexed to Central Electricity Authority (Installation and Operation of Meters) Regulations, 2006 b) Sealing of interface meters, shall also be done by both the supplier and the buyer. 1) Sealing of User meters shall be done by the STU. ii) Sealing of energy accounting and audit meters shall be done by the STU or generating company as the case may be. Seal shall be unique for each utility and name or logo of the utility shall be clearly visible on the seals. Only the patented seals (seal from the manufacturer who has official right to manufacture the seal) shall be used: Polycarbonate or acrylic seals or plastic seals or holographic seals or any other superior seal shall be used. Lead seals shall not be used in the new meters. Old lead seals shall be replaced by new seals in a phased manner and the time frame of the same shall be submitted by the STU to the Commission for approval:

15 · 13 Safety of meters 1) The supplier or buyer in whose premises the interface meters are installed shall be responsible for their safety. 2) The User shall, as far as circumstances permit; take precautions for the safety of the meter installed in his premises belonging to the STU or Distribution licensee. 3) The generating company or the STU who owns the energy accounting and audit meters shall be responsible for its safety:

15 · 14 Meter reading and recording

15 · 15 Meter failure or discrepancies 1) Interface meters a) Whenever the difference between the readings of the Main meter and the Check meter for any month is more than 0.5%, the following steps shall be taken: i) Checking of CT and VT connections;

15 · 16 Anti-tampering features of meters The meters shall be provided with such anti-tampering features as per the Standards on Installation and Operation of Meters given in the Schedule annexed to Central Electricity Authority (Installation and Operation of Meters) Regulations, 2006

15 · 17 Quality assurance of meters 1) The STU shall set up appropriate number of accredited testing units or utilize the services of other accredited testing laboratories. The STU shall take immediate action to get the accreditations of their existing meter testing laboratories from NABL, if not already done. 2) The generating company or STU shall ensure that all type, routine and acceptance tests are carried out by the manufacturer complying with the requirement of the relevant BIS or BS or IEC as the case may be.

15 · 18 Calibration and periodical testing of meters. 1) Interface meter a) At the time of commissioning; each interface meter shall be tested by the STU at site for accuracy using standard reference meter of better accuracy class than the meter under test. b) AIl interface meters shall be tested at least once in five years. These meters shall also be tested whenever the energy and other quantities recorded by the meter are abnormal or inconsistent with electrically adjacent meters. Whenever there is unreasonable difference between the quantity recorded by interface meter and the corresponding value monitored at the billing center via communication network; the communication system and terminal equipment shall be tested and rectified: The meters may be tested using NABL accredited mobile laboratory or at any accredited laboratory and recalibrated if required at manufacturer's works_ Testing and calibration of interface meters may be carried out in the presence of the representatives of the supplier and buyer by giving due notice of testing in advance.

15 · 19 Data Requirements State Generating Station (SGS) and State Transmission Utility (STU) shall provide data to each other and SLDC as specified in Appendix G of Data Registration Chapter -17 .

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16 · 2 Safety Standards: (1) STUs shall prepare their own "Safety Manual" for the maintenance of Transmission Lines, and Substations and got vetted by an accredited agency: Copies of this safety manual shall be provided at all the sub- stations, concerned departments of STU and Users. For the guidance of the Shift Operators, "Operation and Maintenance Manuals" for each Sub- station shall be prepared by the STU and Users containing all the maintenance and operation schedules based on the recommendations of the manufacturers of the various equipments installed in the Substation: These manuals shall be periodically reviewed based on the experience gained and replacement of equipments. A maintenance register for all the equipments including the station batteries shall be maintained at the respective Substations These shall be updated as and when the maintenance work is carried out and shall be periodically reviewed by the Commission. Similar registers shall be maintained for the Transmission and Sub-Transmission Lines. (2) The Operation and Maintenance Manual' shall clearly specify the details of isolation and earthing to be provided for allowing work on the equipments. The 'Single Line Diagram' of the Substation indicating the positions of various isolating devices shall be prominently displayed in the station. Charts showing the clearances from live parts (section clearance) for working on the isolated equipments where workmen are allowed to work shall be displayed prominently at each Substation. (3) STUs and Users shall affix the "Danger" boards (of a design as per relevant ISS No. 2551) prominently displayed at a conspicuous place at all the locations as required in the IE Rules. All the equipment including the system batteries in the receiving stations and Substations shall be maintained in good condition as per the manufacturers' manuals and also as per relevant Indian and or

16 · 3 Line Clear Permit (LCP): The formats enclosed shall be used while issuing and returning line clear permit: The Format 1 designated as Requisition for Line Clear Permit" shall be used by the requesting Safety Coordinator who is an authorized person. The Format 2 designated as "Line Clear Permit" shall be used at the time of issue of Line Clear Permit The Format -3 designated as "Line Clear Return" shall be used for the return of the Line Clear Permit after the work is completed for which the Line Clear Permit is taken.

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17 · 4 Changes in User's Data Whenever any User becomes aware of a change to any items of data that is registered with STU, the User must promptly notify the STU of the changes: STU on receipt of intimation of the changes shall promptly correct the database accordingly. This shall also apply to any data compiled by STU regarding its own system.

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18 · 2 Power to Remove Difficulties:

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15 · Minute block-wise demand estimates for the day ahead.

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4 · Immunity to External Factors