Brief Description of the Set-Up and Activities of the Power and Telecommunication Coordination Committee (ptcc)

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Low Frequency (LF) Induction

      1. The Committee considered the question of modifying the existing limits relating to LF induction at the meeting held in May 1953 but was not inclined to permit any general relaxation of the existing rules. It was felt that cases, which prove to be extremely difficult, should be considered individually and decided on their own merits.

      1. At its meeting held in March 1955, the Committee noted that the CCIF had agreed to raise the limit of maximum permissible low frequency induction to 650V in the case of high tension lines of high security. The Committee decided that this recommendation be adopted in India and for this purpose all EHT lines (66 KV and above) may be considered as belonging to the category of high security lines subject to the following:


  1. In addition to conforming to certain minimum requirements in respect of mechanical strength, electrical insulation, geography of the region etc., lines of high security shall be equipped with protective devices and circuit breakers so that the total duration of an earth fault current shall be within 0.2 seconds in the majority of the cases and shall in no case exceed 0.5 seconds.

  1. The CCIF recommendations raising the limit of longitudinal induction to 650 Volt do not in general apply to cases of signaling circuits of railway systems and the value of 430 volts would be in force for such circuits.

  1. The 10th Plenary Session held on 15th March 1955 decided to adopt the CCIF recommendations regarding electrostatic induction also, i.e., there is a danger / risk if under normal operating conditions of an AC traction line with earth return through Rail or as a result of an accidental earth fault on one phase of an aerial power circuit of a single phase line or of a three phase line with neutral point normally insulated, the discharge current to earth of the two wires in parallel of an open wire telephone line through an impedance of negligible value exceeds 15 milliamps (RMS).

      1. The question was further discussed in the meeting held on 15th June 1956 and the following recommendations were made.

  1. Except in the case of block signal and train wires and other similar circuits on which line-clear signals are passed, the (revised) limit of 650 Volts may be applied for Railway circuits such as administrative control, railway through, traffic control, deputy control etc.

  1. For control and deputy control circuits on which operating personnel would be working continuously, the operator’s telephone set should be fitted with suitable acoustic shock absorbers in addition; proper protective devices like gas and carbon arrestors may be fitted on the circuits wherever they enter an office.

  1. In all cases of parallelism involving railway circuits, the overall parallelism may be examined keeping in view a maximum permissible limit of 650 volts provided that in no block section within the total stretch of parallelism, the low frequency induction in any circumstances exceeds 430 volts.

  1. For the purpose indicated in (iii), a reference will be made to the concerned Railway authorities as also to the Deputy Director (Telecom), Railway Board and their views obtained before the route of the high security HT line is approved by the Committee.

      1. The question of protection for telecom lines in cases of heavy induction was discussed in Technical Session held on 2nd December 1964. It was decided that where the induced voltage is so high as to warrant provision of GD tubes, at close intervals, other remedial measures such as cabling or adoption of microwave etc. might be considered. Such individual cases should be put up before the Committee. In the Technical Session held on 5th January 1967, the question of conducting LF tests for induction was considered and it was decided that State Levels Units can be entrusted with this work when possible and the results sent to the Central Committee.

      1. In the meeting held on 24th February 1982, it was agreed to, that ‘successive infeed’ method on three phase lines will be adopted for LF test as it will enable more number of readings to be taken. The detailed test procedure is given in Chapter VII of this manual.

    1. Co-ordination Measures

      1. The March 1955 meeting considered the question of directives to field officers to decide cases of parallelism involving HT lines below 11 KV. A sub-committee was appointed to examine this question and suggest measures of co-ordination in such cases. This question of joint use of poles for power and telecom lines was also discussed and it was suggested that joint use may be tried in some cases and based on experience gained, suitable directives could be formulated.

      1. In the meeting held in September 1957, the Chairman desired that in regard to all the cases where the induced voltages on the communication lines are found to be dangerous and where remedial measures are proposed to be taken on the communication lines, the danger involved should be specifically brought to the notice of the local communication authorities. Further, a list of all such cases should be maintained with a view to checking the progress of the remedial measures that are taken.

      1. In the Technical Session held on 6th May 1971, the question of recommendations regarding ‘statutory’ provision in respect of power and telecom co-ordination was discussed at length. It was unanimously agreed that before making mandatory provision, it was essential to take necessary steps to make the working of the PTCC more efficient so that cases are cleared quickly. The Plenary Session held on 7th May 1971, decided that all cases disposed off by the State Level Committees be presented before the PTCC for formal approval.

      1. In the meeting held on 3rd September 1974, at New Delhi, it was recommended that in view of the large number of accidents to telecom personnel due to deficiencies on LT leads and service loops, SDO of the P&T Department and AE of Electricity Board should meet every month and besides discussing the deficiencies and irregularities they should also have a joint inspection of the concerned section for taking suitable remedial action.

      1. The meeting held on 11th April 1975 considered the question of additional staff to deal with PTCC work and passed a Resolution that an officer each of the rank of AE may be attached to Member (Power) and Member (Telecom) of the State Level PTCC for different items of work relating to the PTCC. The Committee desired that Electricity Boards should provide in their line estimates, necessary provision for protection of all power crossings and a certificate to that effect should be endorsed on the estimate.

      1. In the meeting held on 7th April 1983, it was intimated that the State Electricity Boards would be advised by Central Electricity Authority to accede to requests for power shut down from Telecom field units at appropriate levels, if danger to human life was involved in connection with their maintenance work. This issue has to be dealt on humanitarian grounds.

      1. While discussing about construction of power/telecom lines without PTCC approval and energization of power lines without energization certificate in the meeting held on 6th November 1986, it was decided that Electrical Inspector of the State has to ensure that the Indian Electricity Rules and Indian Electricity Act, based on which these rules were made, are observed in practice. They can grant permission for energization of lines only after satisfying that provisions on rules are met. The comments of Secretary, Central Electricity Board in this connection is given in Appendix XII to Chapter I.

      1. In the meeting held on 11th November 1991, it was intimated that the work of marking of power and telecom lines in maps of scale 1 Cm = 0.5 Km and interchanging them is in progress on telecom side and some of the electricity boards also confirmed of having taken up or are in process of starting the work.

    1. Induced Voltage Calculations

      1. In the meeting held in February 1961, the question of taking the value of fault resistance in computations of fault current as recommended by CCITT was considered. The Chairman suggested that the practice of not taking the resistance erred on the conservative side and may be continued except where the procedure led to serious difficulties. This was further discussed in January, 1967 meeting and it was decided that for parallelism which does not terminate in a sub-station 20-ohms fault resistance can be taken. In respect of parallelism terminating at substations, 20-ohms fault resistance may be taken provisionally pending further investigations.

      1. In view of the very large number of cases processed by the Central PTCC, the question of further decentralization of PTCC cases was discussed in the meeting of the Chairman of SEBs held in January, 1978 and it was recommended that cases of power lines up to and including 132 KV would be handled by the SEBs themselves and concerned Regional DET (PTCC). Cases of power lines of 220 KV and above would be processed by the Central PTCC. Accordingly, guidelines were prepared by the Central Electricity Authority for computation of induced voltages and circulated to the SEBs. The nominees of Electricity Boards have also been briefed where necessary about the procedure for computation during their visits to the CEA office. Four training courses on power telecom co-ordination have been arranged in August 1977, May 1978, August 1978 and March 1979 by the Central Electricity Authority at the Power System Training Institute at Bangalore at which officers from various SEBs, Telecom and Railways have been offered training on theoretical and practical aspects of co-ordination by Engineers from the Central Electricity Authority/Telecom and Railway Boards. Similar training courses are continued to be arranged once every year.

      1. In the meeting held on 23rd October 1980, it was agreed that the cases of inter-state lines of 132 KV and below would be handled by Central Electricity Authority in view of procedural difficulties in dealing with different states.

      1. In the meeting held on 26th September 1984, members were informed about the ready reckoner for computation of mutual coupling prepared by Rajasthan State Electricity Board (RSEB) and duly checked by Central Electricity Authority. It was decided that RSEB may go ahead with the printing of Ready Reckoner to be supplied to the participants on demand on actual cost basis.

      1. In the meeting held on 14th June 1990, representative of Central Electricity Authority intimated that the computation of induced voltage is already being done by computer in CEA and the programs for computation of Mutual Coupling (MC) and Fault Current (FC) calculations are available for supply to the interested organizations on consultancy basis. Regarding computerization of maps etc he assured to examine it in consultation with Department of Telecommunications.

    1. Licensing Very High Frequency (VHF) & Power Line Carrier Communication (PLCC) Facilities

6.8.1 The question of licensing VHF and PLCC facilities required by power systems was discussed in Plenary Meeting held on 9th December 1955 and the Committee resolved that:

  1. The Ministry of Communication be requested to pursue a liberal policy of granting licenses to power supply undertakings for providing communication facilities required for operation and maintenance of power systems.

  1. The power supply undertakings, while forwarding applications to the Telecom Department for obtaining licenses for their own communication facilities, should endorse a copy to the PTCC for examination of technical matters and recommendations to DG Telecom.

  1. The Ministry of Communication is requested to reconsider the stipulation regarding taking over the communication network of the power supply authority, while granting licenses to Power authorities for operating their communication facilities.

  1. The question of royalties and fees payable by the power supply undertakings may be a matter of negotiation between the Ministry of Communication and the party concerned.

The procedure for granting licenses for PLCC systems was further discussed in the Plenary Meeting on 28th January 1959 and it was decided that Power authorities should refer all cases to the PTCC, who in consultation with the Wireless Adviser, would forward it with their recommendations to the DG Telecom.

      1. The Committee felt that PLCC cases would not come strictly within the purview of the PTCC and as such lists of PLCC cases need not be put up before future Committees. The Committee ratified the instructions already issued to state level committees.

6.8.3 In the meeting held on 8th May 1981, it was intimated that Telecom Directorate had issued instructions and Central Electricity Authority concurred with them according to which-

  1. In cases where detailed survey for the power line is to be completed the PTCC should be intimated along with the PLCC application that a power line is to be constructed between these places and details shall be furnished after survey;

  1. In cases, where PLCC is to be superimposed on a power line not referred to the PTCC the same has to be referred to the PTCC before applying for PLCC frequency allocation.

In cases of lines constructed prior to the formation of PTCC, it was decided in the meeting that in such instances, the PTCC case would be regularized through PTCC but the frequency allocation should not be held up on this account.

    1. Apportionment of Costs

6.9.1 In the 23rd Plenary Session of the PTCC held on 6th January 1967, the financial aspects of co-ordination measures were discussed at length. It was decided that the later entrant in the field should pay the initial cost of protective measures recommended by the PTCC + 15% towards spares.

      1. The question of apportionment of costs for protection of railway block circuits against induction from power lines under fault conditions has been under the consideration of the PTCC from 1972 onwards. The following is a chronological record of the case:

  1. PTCC meeting on 24th March 1972 sets up working group of Railways and the then P&T to discuss the issue.

  1. Meeting of Working Groups on 25th August 1972. No agreement reached.

  1. PTCC meeting of 21st October 1972 decided to revive the Working Group.

  1. Meeting of Working Group on 28th March 1973. Agreement not possible.

  1. PTCC meeting on 10th August 1973 discussed the issue again and decided as follows with the Railway representative dissenting:

  1. The PTCC will concern itself to giving route approvals in all cases (whether Telecom or Railway owned) by providing protective measures to conform to the voltage limits specified by CCITT.

  1. In case any using Department wants additional protective measures to meet the special needs of its own, such Departments would have to adopt suitable measures at their own cost.

  1. In respect of block circuits leased from Telecom, the Telecom authorities would indicate the required details in the route map. In respect of Railway-owned circuits, however, such details would be obtained from the local authorities. A reference will be made to the Railways before route approvals only in cases where even after adopting standard protective measures, it is not possible to bring down the induced voltages to the levels prescribed by the CCITT.

  1. Matter reviewed in the PTCC meeting on 25th January 1974, which reiterates the decision as at (v), with the Railway representatives not being in agreement with it.

      1. The question of apportionment of costs between Power and Telecom (Telecom/Railway) authorities for re-engineering of circuits affected by newly laid power lines has been under discussion between the CEA and the Telecom Board based on the report of the PTCC Study Team referred to in Para 6.1.6. The Telecom Board then accepted the principle of cost apportionment in such cases on the basis of 2/3 and 1/3 share between Power and Telecom authorities. A copy of the Telecom Board’s letter dated 18th July 1981 in this regard is at Item I in Appendix XIII to Chapter I.

      1. In case, the interference current on Earth Return Telegraph Circuit exceeds the prescribed limit of 1/10th of the working current on account of electrostatic or electromagnetic induction due to the cumulative effect of various power lines, then it was agreed in the Central PTCC meeting held on 29th July 1983 that the later entrant contributing to making the limit being exceeded would be liable to pay for the conversion of earth return to metallic return even though the contribution due to that particular power line by itself may not exceed 1/10th of the working current.

      1. After detailed discussion in the meeting held on 17th November 1983 at Ernakulam, it was decided that the old cases of power and telecom lines not yet cleared by the PTCC should be regularized. The concerned field authorities were requested to take action accordingly. As regards the question of later entrant for the purpose of protection measures etc. the date of reference of the case to the PTCC should be the deciding factor. Chairman suggested that, wherever the records of clearance were not available in the case of existing telecom/power line, the date of construction should be the deciding factor. If the records were not available in spite of best efforts, LF tests should be conducted and the cost of protection should be shared by both the parties concerned on 50:50 basis.

      1. A decision about the basis for deciding the later entrant was taken in the meeting held on 20th February 1984 for the purpose of cost apportionment. Accordingly-

  1. From 17th November 1983 onwards the date of reference to the competent PTCC authority will be the basis for cost apportionment for re-engineering and protective measures to telecom lines in respect of new lines proposed or constructed and

  1. In all old cases of DOT and power lines prior to 17th November 1983, actual date of construction/modification involving LF induction will be the basis for the cost apportionment for re-engineering and protective devices.

      1. A high level meeting was held on 4th May 1992 in connection with apportionment of costs of re-engineering with apportionment of costs of re-engineering between representatives of DOT and DOP and the minutes circulated vide DOT letter No.10-11/92-ML dated 25th May 1992 were given at Item-II in Appendix XIII to Chapter I.

      1. In the meeting held on 16th February 1995 at Bhopal, Director (ML) readout the guidelines approved by DOT based on the recommendations of the high level committee on methodology for obtaining payment of re-engineering charges towards affected telecom circuits/lines from Power authorities. DOT, New Delhi letter No. 10-11/94-ML dated 30th January 1995, containing these guidelines is included in Appendix XIV to Chapter I. It was decided to settle all pending and future re-engineering cases based on these guidelines.

    1. State Level Power & Telecommunication Coordination Committee (SLPTCC)

6.10.1 A proposal for the formation of Sub-Committee to deal with power lines of voltage up to and including 33 KV was considered in the Technical Committee meeting held on 5th January 1967. Considering that large lengths of 11, 22 and 33 KV power lines have to be constructed on top priority basis in the context of the five year plans, the PTCC felt that creation of Sub-Committees at State Level is warranted to handle problems of co-ordination in regard to sub-transmission lines. The PTCC accordingly recommended to Government the formation of State Level Committees in each of the States comprising representative each from the office of the General Manager, Telecom and Chief Engineer, State Electricity Board of the respective states. These Committees will dispose of parallelism cases of power lines up to 33 KV in their respective states in accordance with a ‘simplified procedure’ drawn up and furnish to the Central Committee a quarterly progress report about the co-ordination cases processed by them. The PTCC felt that this active association of power and telecom interests would remove the bottlenecks existing at present.

      1. The meeting of the Committee held on 25th January 1974 agreed to the proposal of the Railways for inclusion of their representatives in the various State Level Committees. It was also decided in the meeting held on 3rd September 1974 that during the interval between two PTCC meetings, at least one case may be taken up for detailed tests and investigation. The JS (P) and JS (T) would submit the reports of such tests to the PTCC for further action.

      1. In the meeting held on 21st March 1980 at Jabalpur, it was decided that the completion of protection works for the cases for which Central PTCC issues route approval might be discussed in the State Level PTCC meetings. It was decided that the minutes of State Level PTCC meetings would also be endorsed to Central Electricity Authority, New Delhi.

      1. In the meeting held on 26th September 1984, it was decided that AE (PTCC) of T&D Circle would continue to be the Secretary for State Level PTCC. In the 58th Central PTCC meeting held on 25th February 1993 decisions were taken about frequency of State Level PTCC meetings and additional functions to be performed by State Level PTCC so as to make it more effective. The revised present composition of State Level PTCC and its frequency and functions are given in Appendix XV to Chapter I.

      1. In the meeting held on 24th January 1990, it was clarified that the decisions of Central PTCC are binding on State Level PTCC and since DETs (PTCC) are attending all State Level PTCC meetings; they should ensure that no adverse/contradictory decisions are taken at State Level PTCC meetings.

      1. In the meeting held on 16th February 1995 at Bhopal, the matter for up-gradation of Chairmanship of State Level PTCC was discussed and it was felt that there was no such necessity and the present system was found to be working satisfactorily. However, Members were of the view that as at the Central level, at the State level also a high level co-ordination body may be constituted, wherever necessary, with the GM on telecom side and CE on power side to settle those cases which remain unresolved even after two State Level PTCC meetings.

    1. Co-ordination with Railways

6.11.1 The Railway Board has been writing to the PTCC ever since stating that the decisions of the PTCC are not acceptable to it and that the Electricity Boards pay for all protective measures which the Railways consider necessary for ensuring that the block circuits are protected from induction. The matter has been discussed again with the Railway Board by officers of the Central Electricity Authority to ascertain the types of block circuits and the extent to which they are affected by induction. It is seen that there are nearly 25 types of block instruments of which a few can withstand induction up to 430V, a few can be modified to withstand low levels of induction and a few cannot tolerate any induction.

      1. The above decisions have been modified at a High Level meeting at the level of Members of P&T Board; Member of CEA, Director (Signals) of Railway Board and other concerned officers, which was held in December 1976 and a copy of the minutes indicating the decisions is in Appendix XVI to Chapter I.

      1. Application of Screening Factor due to Rails in induced voltage calculations for Railway telecom and block circuits was under discussion in several Central PTCC meetings and finally a decision was taken in the meeting held on 12th February 1987 that unity screening factor due to rails will be applied only for the Railway block circuits.

      1. AC Immunity levels of Railway block instruments was circulated by Railways vide Director Telecom (Railway Board) New Delhi letters, (i) No.77/W3/TCM/2/Meeting dated 3rd April 1978 and (ii) No. 90/Telecom/PTCC/P/1 dated 25th May 1993, which are included in Appendix XVII to Chapter I.

    1. Guidelines For Laying Power Cables Greater Than 33 KV in Proximity With Telecom Cables

      1. A sub-committee comprising the members from CEA, T & D Circle, BSNL, Jabalpur, AP Telecom Circle, TN Telecom Circle, TNEB and APTRANSCO was set up by the Central PTCC during its 73rd Central PTCC Meeting held on 5th August 1999 at Aurangabad to prepare interim guidelines for laying the power cables greater than 33 KV in proximity with telecom cables. The Committee framed the guidelines and submitted them to the Central PTCC for its approval and acceptance for the use of Power and Telecom sectors. The Central PTCC has approved and accepted the guidelines and they were circulated with the Minutes of the 82nd Central PTCC meeting held at Lucknow on 26th February 2004. These guidelines have been given in Appendix – XVIII to Chapter I.

    1. Summery of important points required to be followed for forwarding of

PTCC proposal.

      1. This information is given as Appendix- XIX to chapter – I

    1. Formation of Protection/Re-engineering Supervisory Sub-committee.

6.14.1 In the 89th Central PTCC meeting held at Aurangabad held on 23rd January 2009 the Central PTCC had accepted the proposal of CEA for formation of a Sub-committee to scrutinize the re-engineering estimates. The Supervisory committee should work to bring uniformity in the scope of equipment required for re-engineering and cost aspects thereof. The Chairman, Central PTCC, advised that in order to make this Supervisory Committee most effective it should include the member from the affected power utility, he will also be the convener of the meeting. He proposed that there should be three permanent members of this Supervisory Committee

1. Director (PTCC), CEA,

2. AGM (PTCC) T&D Circle, Jabalpur.

3. Director (Telecom), Railway Board.
He further proposed that there shall be two/three floating members in the Sub-committee which will be as follows:
1. Member from the affected power utility whose re-engineering proposal is to be scrutinized by the Sub-Committee.

2. A Member from the agency who has given the re-engineering estimate. It will be either BSNL or Railways.

3. Any other party which is directly affected by this re-engineering estimate.
Chairman Central PTCC further said that whenever required the meeting of the above committee has to be convened by the affected power utility.

Appendix I to Chapter I

(Refer Para 2.0)
No.EL.II-151 (7) dated 30th May 1949,

Amended by EL.II-141 (7) dated 29th August 1949

The Government of India have given careful consideration to the problems of interference between power and telecommunication lines and installations and are of the opinion that measures should now be taken to resolve the conflict of interests in regard to the location and working of power and telecommunication lines and installations, which, either exist at present or may arise in the future, with the increasing development of electric power and telecommunication facilities in India.

Both power and telecommunication services are essential to the life of the community, and in the interest of satisfactory and economical service, the Power and Communication authorities should jointly evolve agreed general methods of co-ordination. In individual cases, where general coordination methods are considered insufficient, special measures should be devised to meet the situation in order to prevent or at least minimize the effects of interference.
The Government of India have, therefore, decided to constitute a Central Standing Committee of Co-ordination of power and telecommunication lines.

  1. Composition of the Committee

The Committee will consist of the following:

  1. Shri N.N. Iyengar, Chairman, Central Electricity Commission

  1. Shri H.R. Bhatia, Project Engineer East, Punjab Electricity Branch.

  1. Shri V.R. Raghavan, Project Officer, Central Electricity Commission.

  1. Shri H.N. Shrivastava, Additional Chief Engineer, P&T Directorate.

  1. Shri B.S. Rau, Director of Telegraphs (External Plants), P&T Directorate.

  1. Shri M.B. Sarwate, Director of Communications, Civil Aviation Directorate.

  1. Shri K.V. Venkatachalam, Deputy Secretary, Ministry of Communication.

  1. Shri A.C. Bose, Deputy Secretary, Ministry of Finance (Communication).

  1. Shri S. Neelakantam, Deputy Secretary, Ministry of Works, Mines and Power.

  1. Shri S. Venkataraman, Deputy Secretary, Ministry of Finance.

The above committees may co-opt additional members as may be necessary from time to time, nominate a Joint Secretary each from the Central Electricity Commission and the Posts and Telegraphs Directorate. The headquarters of the Committee shall be at Delhi and the Posts & Telegraphs Directorate will provide secretariat assistance. The terms of office of the members will be one year.

  1. Functions of the Committee

The Committee shall:

  1. Study the existing rules and regulations issued on the subject by competent authorities and suggest that modifications, if any, are called for in the light of present day researches and developments and international practices.

  1. Initiate and undertake scientific and field studies associated with the problem of co-ordination.

  1. Examine and study all individual co-ordination cases and recommend measures to be undertaken.

  1. For carrying out the above functions, the Committee may seek the assistance of the Engineering Branches of the Posts and Telegraphs Department, the Engineering Departments of the Central and Provincial Governments and other scientific organizations in India, such as, the Indian Institute of Science, Bangalore and the Council of Scientific and Industrial Research, New Delhi, in carrying out various field studies and experiments.

  1. In order that field tests and investigations may be carried out by various scientific bodies and the Posts and Telegraphs Department on behalf of the Committee, it is recommended that the Central, Provincial and State Governments whose co-ordination problems are to be considered, should provide in their annual budgets necessary lump sum grants for the purpose.

ORDERED that this Resolution be communicated to all provincial Governments, all Chief Commissioners, the Ministries of the Government of India (including Joint Secretaries, Ministry of Finance, Defence Division, I&C Division and Communications Division). The Cabinet Secretariat, the Prime Minister’s Secretariat and the Private and Military Secretaries to his Excellency the Governor General.
ORDERED so that the Resolution be published in the Gazette of India, for general information.

(B.K. Gokhale)


Appendix II to Chapter I

(Refer Para 3.1)
Government of India

Ministry of Works, Mines & Power
No.EL.II-151 (7) Dated, New Delhi, the 19th September 1949
From : Shri S. Neelakantam,

Dy. Secretary to the Govt. of India.


All Provincial Governments, Chief Commissioners and State Governments.

Subject: Co-ordination between Power & Telecommunication Systems.
I am directed to invite the attention of all Provincial Governments etc to the Resolution of the Government of India, in the Ministry of Works, Mines and Power No. EL.II-151 (7) dated the 30th May 1949, constituting a Central Standing Committee on co-ordination of Power & Telecommunication systems. This Committee has commenced its labours and in its first meeting held in New Delhi on the 11th August, 1949 has formulated the general procedure and principles which it will adopt. The Committee has already begun the task of examining the problems of Co-ordination of Power and Telecommunication systems and of carrying out detailed scientific investigations with a view to evolve satisfactory solutions to them. In this work, the Committee will generally be guided by the recommendations of the ‘Comite Consultatif Internationale Telephonique a grande distance’. It is, however, felt that situations may arise where rigid application of the recommendation of the CCIF cannot be enforced without causing considerable inconvenience either to Power or Communication authorities. Such cases will be examined in the light of field experiments and recent data available in the other countries. The Committee proposes to deal with these individual problems as they arise and in this connection, has formulated the following general points for its guidance.

  1. In any interference situation, the Committee will give careful consideration to the various possible methods of reducing the interference to the permissible limits and recommend to the parties concerned that method which involves the least cost to the country (irrespective of the system on which these measures are carried out) consistent with the proposed measures being technically sound and efficient.

  1. The least cost mentioned in Item (a) above will take into account the first cost as well as the present value of the increase or decrease in the recurring maintenance costs.

  1. Whether the remedial measures are carried out on the power line or on the communication line, the apportionment of the cost as between the participating parties and/or Governments will be worked out in each case with the due regard to existing laws and established practice.

2. It is expected that the rapid development of power and communication services in the country is likely to give rise to a large number of difficult interference situations. In order not to hold up the progress of these important projects, it is urgently necessary to find acceptable solutions to the problems.
3. Accordingly, in order to facilitate and expedite decisions in the case of any new transmission lines or modifications to the existing lines, it is requested that the co-ordination committees is apprised of the intentions of the Provincial Governments, Licensees etc. in regard to schemes for the construction of transmission and distribution lines together with all relevant details required for the construction of the question. All Provincial Governments, State Governments, etc, are therefore requested to advise the heads of their respective Electricity Departments to forward to:

  1. The Joint Secretary (Power), Power Telecommunications Co-ordination Committee, Central Electricity Commission, Simla and also to-

  1. The Joint Secretary (Telecommunications), Power Telecommunications Co-ordination Committee, P&T Directorate (Development Branch), Eastern Court, New Delhi.

Particulars asked for in the enclosed questionnaire of all transmission line schemes, which are either under construction or have been projected. Further, the Electrical Inspectors of the Provincial Governments may also be requested to instruct the Electricity Supply Licensees to take similar action in respect of transmission lines being constructed by them. In the case of those states where there are no Electrical Inspectors, the State Governments may directly advise the Electricity Supply Licensees in their jurisdiction in regard to this matter.

4. The Provincial and State Electricity Departments or Electricity Licensees desiring information regarding telegraph or telephone installations in their areas may consult the local Divisional Engineers Telegraph or the Directors of Telegraphs.
Yours faithfully,

(S. Neelakantam)

Deputy Secretary to the Government of India

Appendix III to Chapter I

(Refer Para 3.2)
Rules of Business of the Central Standing Committee for

Co-ordination of Power and Telecommunication Lines

(Adopted in the Central PTCC Meeting held on 24.03.72)

  1. The Government of India has constituted a body called Central Standing Committee of Co-ordination of Power and Telecommunication lines, hereafter referred to as the Power and Telecommunication Co-ordination Committee (PTCC) under Resolution No. II-151 (7) dated 30.5.1949, generally to exercise such functions and duties as assigned and in such manner as prescribed by the Government and in particular to:

  1. Study the existing rules and regulations issued on the subject by competent authorities and suggest what modifications, if any, are called for in the light of present day researches and developments and international practices.

  1. Initiate and undertake scientific and field studies associated with the problem of co-ordination.

  1. Examine and study all individual co-ordination cases and recommend measures to be undertaken.

  1. To consider and make recommendations to Government on all matters concerned affecting power and telecommunication systems.

  1. The PTCC hereby makes the following Rules of Business in order to facilitate its working and carrying out its functions and duties.

  1. Short Title

  1. These may be called the Rules of Business of the Power and Telecommunication Co-ordination Committee.

  1. They shall come into force with immediate effect.

  1. Any acts done by the PTCC hereafter would be considered to have been done under these Rules.

Part I

  1. Definitions

In these Rules unless the context otherwise requires:

  1. PTCC means the Power and Telecommunication Co-ordination Committee.

  1. Chairman means the Chairman of the PTCC.

  1. Vice- Chairman means the Vice-Chairman of the PTCC.

  1. Member means Member of the PTCC nominated by Government of India

  1. CWPC (PW) means Central Water & Power Commission (Power Wing) while P&T means Posts and Telegraphs Department.

  1. Joint Secretary (Power) means Joint Secretary of the PTCC and Joint Secretary (Telecom) means Joint Secretary of the PTCC respectively from CWPC (PW) and Post and Telegraph.

  1. Meeting means meeting of the PTCC.

  1. All other works and expressions used herein and not defined specifically shall have the meanings respectively assigned to them in the Indian Telegraphs Act 1885, the Indian Electricity Act 1910 and the Indian Electricity (Supply) Act 1948.

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