Section 13 in Madhya Pradesh Electricity Grid Code (Revision-II), 2019
13. Section 13
Inter User Boundary Safety13.1Introduction. - This section sets down the requirements for maintaining safe working practices associated with inter user boundary operations. It lays down the procedure to be followed when work is required to be carried out on electrical equipment that is connected to another User's system.13.2Objective. - The objective of this section is to achieve agreement and consistency on the principles of safety as prescribed in the Indian Electricity Rules when working across a inter user boundary between one User and another User.13.3Designated Officers. - STU and all Users shall nominate suitably authorized persons to be responsible for the co- ordination of safety across that company boundary. These persons shall be referred to as Designated Officer.13.4Procedure13.4.1STU shall issue a list of Designated Officers (names, designations and telephone numbers) to all Users who have a direct inter user boundary with STU. This list shall be updated promptly whenever there is change of name, designation or telephone number.13.4.2All Users with a direct inter user boundary with STU or other user system shall issue a similar list of their Designated Officer to STU or other user, which shall be updated promptly whenever there is a change to the Designated Officer list.13.4.3Whenever work across an inter-user boundary between STU and any other User or between two users is to be carried out, the Designated Officer, of the User (which may be STU), wishing to carry out work shall personally contact the other relevant Designated Officer. If the Permit to Work (PTW) cannot be obtained personally, the designated officers shall contact through telephone and exchange Code words to ensure correct identification of both parties.13.4.4Should the work extend over more than one shift the Designated Officer shall ensure that the relief Designated Officer is fully briefed on the nature of the work and the code words in operation.13.4.5The Designated Officers shall co-operate to establish and maintain the precautions necessary for the required work to be carried out in a safe manner. Both the established isolation and the established earth shall be locked in position, where such facilities exist, and shall be clearly identified.13.4.6Work shall not commence until the Designated Officer, of the User (who may be STU), wishing to carry out the work, is satisfied that all the safety precautions have been established. This Designated Officer shall issue agreed safety documentation (P-1W) to the working party to allow work to commence. The PTVV in respect of specified EHV lines and other interconnections shall be issued with the consent of SLDC.13.4.7When work is completed and safety precautions are no longer required, the Designated Officer who has been responsible for the work being carried out shall make direct contact with the other Designated Officer.to return the PTW and removal of those safety precautions. Return of PTW in respect of specified EHV lines and interconnections shall be informed to SLDC.13.4.8The equipment shall only be considered as suitable for return to service when all safety precautions are confirmed as removed, by direct communication using code word contact between the two Designated Officers, and return of agreed safety documentation from the working party has taken place.13.4.9STU shall develop an agreed written procedure for inter user boundary safety and continually update it.13.4.10Any dispute concerning Inter user Boundary Safety shall be resolved at an appropriate higher level of authority.13.5Special Consideration13.5.1For inter user boundary between STU and other Users circuits, all Users shall comply with the agreed safety rules, which must be in accordance with IE Rules.13.5.2All equipment on inter user boundary between STU and other Users circuits which may be used for the purpose of safety co-ordination and establishment of isolation and earthing, shall be permanently and clearly marked with an identification number or name, that number or name being unique in that sub-station. This equipment shall be regularly inspected and maintained in accordance with manufacturer's specification.13.5.3Each Designated Officer shall maintain a legibly written safety log, in chronological order, of all operations and messages relating to safety co-ordination sent and received by them. All safety logs shall be retained for a period of not less than 5 years.
