MIS-May 31.05.2024.pptxCIYIULXEUCSVYUEYTTFGHJHKIJ

MONTLY TC AOEA

1. MIS: May, 2024 Customer Complaints Review Prepared By Rohan Pawar Reviewed By PM Yadav

2. Prepared By Rohan Pawar Verified By PM Yadav Customer Complaint Response Status May-24 MIS: Customer Complaints May-24 No of Complaints Reported in May : 06 Nos. No of Complaints Responded within 48 Hrs : 06 Nos. No of Complaints Closed in May < 7 days : 03 Nos. No of Complaints Open in May : 03 Nos. Note : TA Replacement work at site is planned in first week of June. We are sending 03 nos. 72.5kV bushing at TA factory in next lot along with other supply. BHEL engineer visit at site within one day & bushing erection plan is awaited from bhel ( except within a first fifth week June), V oltamp sent 72.5kV RIP bushing for healthiness checking due to accident. Bushing offered for healthiness of testing.

3. Prepared By Rohan Pawar Verified By PM Yadav Customer Property Status MIS: Customer Complaints May-24 Receipt of Customer Property in May : 05 Nos. Closure of Site return ( Within 30 days of opening ) : 06 Nos. Closure of Site return >30 days : 00 No.

4. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints May-24 Customer Property Details Sr No Actions Qty N ame of customer Responsible 1 Pending for internal clearance 13 GMR, T&R, NTPC, IMP Sales and R&S – DS and RP / PMY 2 Pending for PO 11 T&R & Atlanta Sales & R&S – RP and DS , AG 3 PowerGrid Inspection 4 BHEL / POWERGRID Purchase- new design electrode RP- JT –Inspection call Testing 4 Analysis 1 Voltamp Planning / production QA R&S 5 Under repair 5 Voltamp , Toshiba Production 6 Return to customer 3 Adani and Voltamp Production and service

5. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 Customer Property Details Brief about Pending Work Sr No Customer Rating OIP/ RIP/ HC Qty Remark 1 GMR Rajahmundry Energy Limited 36KV 12500A 0CT HC 1 Customer plant is closed. Internal communication retrieved. Formal note for approval of open challan will be put. This property to be closed in system. 2 T&R 72.5 KV 800A 100CT RIP 8 Email sent to T&R 18.02.024 and requested to share open challan with YASH. Also requested to revert on YASH RGP open challans. Follow up email 21.02.2024, 29.02.2024 & 09.03.2024,15.04.2024 and 06.05.2024. 3 NTPC LTD. 36KV 16000A 0CT HC 1 PMY sent email to NTPC on 29.02.2024 for open challan. Follow up email sent on 15.03.24, 15.04.2024 and 06.05.2024. 4 IMP POWER 72.5KV 800A 100CT RIP 3 Note was put to CFO. Since, we have lodged claim, we can not use / scrap / close challan in system. We need to maintain this balance in our books. This can be closed after our claim settlement . 5 ATLANTA 72.5KV 800A 100CT OIP 5 PO from Atlanta pending. DS has taken with AEL. 6 BHEL BHOPAL - Bhuj site PGCIL 145 kV 1250A 500 CT RIP RIP 4 New design electrodes received. Inspection call given to BHEL. Nomination awaited. It was decided that 2 Nos. new manufactured bushing will be supplied by Yash and billing for 1 bushing will be done. E-mail sent through JT on 098.05.24. PO Awaited. These 2 no. manufactured bushings are being diverted to GE.

6. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 Customer Property Details Brief about Pending Work Sr No Customer Rating OIP/ RIP/ HC Qty Remark 7 T&R 72.5 kV 2000A 300 CT & 52 kV 3150A 300 CT OIP & RIP 5 Follow up email sent on 09.01.2024 & 27.01.24, 14.02.2024, 18.02.2024, 21.02.2024, 29.02.2024 & 09.03.2024,15.04.2024 and 06.05.2024 for issuance of PO for repair. 8 Voltamp 72.5 kV 800A 100 CT OIP OIP 4 PO received in Mar-2024. Bushings under repair. Expected to dispatch by 20th May-2024 9 Voltamp 36 kV 1250A 100 CT RIP RIP 1 Bushing tan delta not recovered after oven cycles. Bushing to be send back to Customer along with Sr. No.8. 10 T&R 245 kV 800A 300 CT RIP 1 Order from T&R for replacement of insulator. As per factory team it will get ready by 20.05.2024. 11 BHEL 145 kV 1250A 300 CT RIP 1 Bushing taken from Balipura Assam site for tan delta recovery. Retesting of bushing performed and tan delta found ok. Inspection call given on 08.05.24. 12 Atlanta 72.5 kV 800A 100 CT OIP 1 PO pending from Atlanta for repair of bushing. We submitted repair charges as 17500/- .In customer complaint review meeting production team that to provide new bushing and dis-assemble bushing and hand over OK not parts to store 13 Adani 36 kV 12500A 0 CT HC 2 We have submitted our finding report and repair cost estimate to customer and Adani is planning to purchase new bushings from us. Both the bushings to be packed in the packing cases received from customer and make ready for dispatch

7. MIS: Customer Complaints Apr-24 Prepared By Rohan Pawar Verified By PM Yadav Customer Complaint Details based on Critical and Non-critical Year Total NCR No of Bushings Critical NCR No of bushing in critical NCR Noncritical NCR No of bushing in noncritical NCR 22-23 104 207 33 44 73 165 23-24 92 206 43 90 49 116 24-25 12 46 7 14 5 32

8. Prepared By Rohan Pawar Verified By PM Yadav Chargeable customer complaints handled in Apr-2024 MIS: Customer Complaints Apr-24 - We have taken PO from Truvolt Engineering Co. Pvt. Ltd. For engineer supervision work . Work is hold as transformer is shifted to factory for repair - For Kirloskar customer we have dispatched one bushing advance against open PO for their complaint and customer is sending existing bushing for repair.

9. Prepared By Rohan Pawar Verified By PM Yadav Details for Complaints Contributing to COPQ with the amount MIS: Customer Complaints Apr-24

10. MIS: Customer Complaints Apr-24 List of Customer end complaints closed during month Prepared By Rohan Pawar Verified By PM Yadav Sr No Service Call No Date of Complaint Customer Name Item details Serial Number No of Product Type of Bushing Complaint Type Complaint Details 1 1860 09/04/2024 SCHNEIDER ELECTRIC 72.5 kV 1250 A 300 CT 36316, 36320, 36319, 36317, 36315, 36318 6 Oil to Oil OIP Remote test tap cable related Customer reported for loose connection in remote test tap cable with test tap stem. 2 1865 12/04/2024 Transformers & Rectifiers(India) Ltd 52 kV 3150 A 300 CT 35428 1 RIS High Capacitance-C1-RIS Increased capacitance and high tan delta in RIS Bushing. 3 1869 13/04/2024 Transformers & Rectifiers(India) Ltd 145 kV 800 A 300 CT 2307-15 1 OIP Oil leakage from Bushing oil leakage in 145 kV OIP bushing from test tap bush area. 4 1870 16/04/2024 BHEL Jhansi 72.5kV 3150A 300CT 2522-31 1 RIP Test tap thread jam RIP - Al cap DTL reported that RIP bushing tan delta cap is jam and not able to open it 5 1871 16/04/2024 MP Power Transmission Company Ltd 72.5 kV 2000 A 300 CT 1747-18,1748-14,1747-23,1747-32,1747-12 5 OIP Test tap thread jam OIP- Old design Tan delta cap jam -OIP old design. 6 1874 23/04/2024 Truvolt Engineering Co. Pvt. Ltd. 145 kV 800 A 300 CT 33115 1 OIP Oil leakage from Bushing- Customer end damage Oil leakage issue reported for Y phase bushing 7 1879 24/04/2024 Atlanta Electrical Pvt. Ltd. 72.5 kV 800 A 100 CT 35125 1 OIP Oil leakage from Bushing Oil leakage from bushing near conservator area. 8 1881 30/04/2024 Prime Meiden Limited 145 kV 800 A 300 CT 23372 1 OIP Transit/Transport damage Observed hair line crack in the porcelain portion. Oil is leaking from the crack portion. 9 1882 30/04/2024 Bharat Bijlee Limited 145kV 1250A 300CT 32782 1 OIP Test tap thread jam RIP- Brass cap Due to cross threading female thread got damage.

11. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 Training to Customer in Apr -2024 : POWERGRID Solapur, NTPC Solapur Training Calendar for May-2024 : Voltamp , Atlanta

12. Prepared By Rohan Pawar Verified By PM Yadav Recovery from site returned bushing in Apr-2024: Disassembly of bushing of Voltamp site returned bushing conducted and flange sent for coating. 02 Nos of 72.5 kV 800A 100 CT OIP Bushings received against RGP Challan no R000006708. After repair one bushing sent to Kirloskar against invoice and one bushing sent against Atlanta complaint from GETCO site for oil leakage. Both the bushings flange sent for Analysis at ERDA. MIS: Customer Complaints Apr-24

13. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 Summary of Customer Complaint (OIP, RIP & HC) Type of bushing FY-19-20 (No of Complaint) FY-20-21 (No of Complaint) FY-21-22 (No of Complaint) FY-22-23 (No of Complaint) FY-23-24 (No of Complaint) FY-24-25 (No of Complaint) Total OIP 31 56 69 45 47 9 2 57 HC 05 02 04 05 4 20 RIP 23 27 37 54 41 3 185 TOTAL 59 85 110 104 92 12 4 62

14. MIS: Customer Complaints Apr-24 Prepared By Rohan Pawar Verified By PM Yadav

15. MIS: Customer Complaints Apr-24 Prepared By Rohan Pawar Verified By PM Yadav

16. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24

17. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24

18. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24

19. Prepared By Rohan Pawar Verified By PM Yadav Customer complaints Details with supply Period MIS: Customer Complaints Apr-24 Customer Name Date of Complaint Date of Supply Supply period SCHNEIDER ELECTRIC INFRASTRUCTURE LTD 09/04/2024 13/02/2024 < 2month Transformers & Rectifiers(India) Ltd 12/04/2024 14/02/2024 < 2month Transformers & Rectifiers(India) Ltd 13/04/2024 04/11/2019 <4.4 Year Bharat Heavy Electricals Ltd. - Jhansi 16/04/2024 20/08/2019 <4.6 Year MP Power Transmission Company Ltd 16/04/2024 2016 <7 Year Bharat Heavy Electricals Ltd. - Bhopal 17/04/2024 29/05/2021 <2.8 Year Truvolt Engineering Co. Pvt. Ltd. 23/04/2024 06/06/2023 <8 Month Kirloskar Electric Co. Ltd. - Mysore 23/04/2024 29/02/2024 < 1Month Atlanta Electrical Pvt. Ltd. 24/04/2024 25/11/2023 < 4 Month Gujarat Energy Transmission Corporation Limited - Himatnagar 29/04/2024 2016 <7 Year Prime Meiden Limited 30/04/2024 04/03/2021 <3 Year Bharat Bijlee Limited 30/04/2024 19/04/2023 < 1 Year

20. MIS: Customer Complaints Apr-24 Details of Complaints Reported in Apr-2024 Prepared By Rohan Pawar Verified By PM Yadav Sr No Service Call No Date of Complaint Invoice no Date of Dispatch Customer Name Item details Serial Number No of Product Type of Bushing Complaint Type Complaint Details Location 1 09/04/2024 YHLD/23-24/0715 13/02/2024 SCHNEIDER ELECTRIC 72.5 kV 1250 A 300 CT OIL-OIL 36316, 36320, 36319, 36317, 36315, 36318 6 Oil to Oil OIP 09/04/2024 Remote test tap cable related Customer reported for loose connection in remote test tap cable with test tap stem. at Schneider Electric Factory 2 12/04/2024 YHLD/23-24/0717 14/02/2024 Transformers & Rectifiers(India) Ltd 52 kV 3150 A 300 CT 35428 1 RIS 12/04/2024 High Capacitance-C1-RIS Increased capacitance and high tan delta in RIS Bushing. 250 MVA, 220/132/11 kV, TATA POWER 3 13/04/2024 286 04/11/2019 Transformers & Rectifiers(India) Ltd 145 kV 800 A 300 CT 2307-15 1 OIP 13/04/2024 Oil leakage from Bushing Cimechel electric pvt ltd Mumbai reported oil leakage in 145 kV OIP bushing from test tap bush area. Hijli TSS kharagpur west bangal RDSO 4 16/04/2024 161 20/08/2019 Bharat Heavy Electricals Ltd. - Jhansi 72.5kV 3150A 300CT 2522-31 1 RIP 16/04/2024 Test tap thread jam RIP - Al cap DTL reported that RIP bushing tan delta cap is jam and not able to open it At DTL SGTN 5 16/04/2024 2016 MP Power Transmission Company Ltd 72.5 kV 2000 A 300 CT 1747-18,1748-14,1747-23,1747-32,1747-12 5 OIP 16/04/2024 Test tap thread jam OIP- Old design Tan delta cap jam -OIP old design. 132KV S/s lndergarh 6 17/04/2024 00109 & 00107 29/05/2021 Bharat Heavy Electricals Ltd. - Bhopal 145kV 1250A 500CT 25087 , 25071 and 25092 3 RIP 17/04/2024 Electrode fixing arrangement related Inspection of bushing for electrode assembly, acetylene increased in reactor. 765/400/220kV Solapur Ss

21. MIS: Customer Complaints Apr-24 Details of Complaints Reported in Apr-2024 Prepared By Rohan Pawar Verified By PM Yadav Sr No Service Call No Date of Complaint Invoice no Date of Dispatch Customer Name Item details Serial Number No of Product Type of Bushing Complaint Type Complaint Details Location 7 23/04/2024 YHLD/23-24/0148 06/06/2023 Truvolt Engineering Co. Pvt. Ltd. 145 kV 800 A 300 CT 33115 1 OIP 23/04/2024 Oil leakage from Bushing- Customer end damage Oil leakage issue reported for Y phase bushing At Jammun site 8 23/04/2024 YHLD/23-24/0776 29/02/2024 Kirloskar Electric Co. Ltd. - Mysore 72.5 kV 800 A 100 CT 31760 1 OIP 23/04/2024 Handling damage at customer end Top cover of bushing opened by customer and having oil leakage issue. at customer works 9 24/04/2024 YHLD/23-24/0513 25/11/2023 Atlanta Electrical Pvt. Ltd. 72.5 kV 800 A 100 CT 35125 1 OIP 24/04/2024 Oil leakage from Bushing Oil leakage from bushing near conservator area. At GETCO Site 66/11 KV Delwada Substation 10 29/04/2024 2016 Gujarat Energy Transmission Corporation Limited - Himatnagar 72.5 kV 800 A 100 CT 24 OIP 29/04/2024 Test tap thread jam OIP- Old design Tan delta Cap jam in 24 bushings. 66/11 KV Ranasan, himatnagar, hajipur, dedhrota, hansalpur GETCO 11 30/04/2024 550 04/03/2021 Prime Meiden Limited 145 kV 800 A 300 CT TR 23372 1 OIP 30/04/2024 Transit/Transport damage Observed hair line crack in the porcelain . Oil is leaking from the crack portion. R DSO site 12 30/04/2024 YHLD/23-24/0049 19/04/2023 Bharat Bijlee Limited 145kV 1250A 300CT 32782 1 OIP 30/04/2024 Test tap thread jam RIP- Brass cap Due to cross threading female thread got damage. MPPTCL- Bhopal

22. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 List of open complaints with an ongoing action plan (Customer Prospective Open Complaints ) till date Sr No Service Call No Date of Complaint Customer Name Item details Serial Number No of Product Type Complaint Type Complaint Details Location Status Res. Dept Target Date 1 1564 06/07/2023 BHEL- Jhansi 72.5kV 3150A 300CT 2522-33 1 RIP PU leakage from Bushing PU leakage from Bushing top cover 220kV Kanjhawala Sub Station. Investigation is completed and Customer Report reviewed by PGR sir. To be shared to customer. Service 12.05.2024 2 1624 09/08/2023 Bharat Heavy Electricals Ltd. - Jhansi 72.5kV 3150A 300CT T 2116-2, 2116-1 2 RIP Increase capacitance of RIP Increased Capacitance of Y & Phase bushings At Gopalpur Bushings are under plan of air end insulator opening and further analysis for finding foil short QA Production E&D service .04.2024 3 1704 27/10/2023 Technical Associates Ltd. 72.5 kV 800 A 100 CT OIP yet to receive Sr no from TA 1 OIP High Tan delta-C1-OIP high tan delta in 72.5 kV OIP Y phase bushing installed with TA 12.5 MVA transformer KPTCL Andersonpet Logistics shared transportation charges for lifting of defective bushing. RP/PMY to be take decision for lifting of bushing from site or not. Transportation Part Load Charges : 16500 to 18000/- Charges : 16500 to 18000/- Service 10.05.2024 4 1766 03-01-2024 Adtiya Energy 72.5kV 800A 100CT 32531 & 32467 2 RIP High Capacitance-C1-RIP Increase in capacitance value in two bushings. (Increase Cx more than 14%) At Aditya Energy factory for GETCO site Planning to add in plan for Joint RCA and provide date to invite customer Planning 20.05.2024

23. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 List of open complaints with an ongoing action plan (Customer Prospective Open Complaints ) till date Sr No Service Call No Date of Complaint Customer Name Item details Serial Number No of Product Type Complaint Type Complaint Details Location Status Res. Dept Target Date 5 1779 24-01-2024 Vishwas Power 145kV 800A 300CT 31128 1 OIP Burn marks on test tap bush/cover burn mark / carbon deposit found in test tap cap along with oil leakage in OIP bushing. Railway Vizianagaram site Bushing received at our works and QA inspection completed. QA to share RCA and CAPA report for tan delta bushing flash over problem QA 15.05.2024 6 1725 21/11/2023 Atlanta Electrical Pvt. Ltd. 72.5 kV 800 A 100 CT 2473-162 1 OIP High Tan delta-C1-OIP High Tan Delta Value found in Y-PH bushing of 66/11KV 15 MVA Atlanta Make Power Transformer At 66KV Bhechada Rohan shared findings for oil leakage by email to Atlanta and submitted repair proposal to Atlanta and PO pending from Atlanta. DS/AG to discuss with Atlanta for PO. Planning to confirm for supply of new bushing. Planning Service 25.05.2024 7 1703 27/10/2023 Transformers & Rectifiers(India) Ltd 52kV 3150A 300CT TRIP 22940 1 RIP Test tap connection open During transformer AMC RIP bushing test tap stem broken while removing test tap cap. at PGCIL Khetri site E&D to advise on rework process for tests tap soldering work. After E&D advise, bushing to be taken for test tap re-soldering and heating cycle to be performed and thereby routine test. Load test to be performed for test tap stem load withstand capacity. E&D Production QA 15.05.2023 8 1811 24/02/2024 SHREE ABIRAMI ENGGINEERING WORKS 52 kV 3150 A 300 CT 32454 1 OIP High Tan delta-C1-OIP High tan delta observed during pre-commissioning tests. at RDSO Madurai Tamil Nadu Abirami sent one new bushing from factory to site and taken back high tan delta issue bushing at their works. Customer end testing plan awaited . RP / SM to get decision from Abhirami. Service 20.05.2024

24. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 List of open complaints with an ongoing action plan (Customer Prospective Open Complaints ) till date Sr No Service Call No Date of Complaint Customer Name Item details Serial Number No of Product Type Complaint Type Complaint Details Location Status Res. Dept Target Date 9 1819 29-02-24 Toshiba 52 kV 6600 A 300 CT 35349 1 HC Oil leakage from Bushing Oil leakage observed in oil end side insulator of bushing. at Toshiba factory Bushing was repaired and sent back to Toshiba and after receipt at customer works observed hair crack in air end insulator. Toshiba is sending back bushing for repair Service 30.05.2024 10 1691 06/10/2023 Bharat Heavy Electricals Ltd. - Bhopal 145kV 1250A 300CT 29104 1 RIP High Tan delta-C1-RIP High tan delta in 145 kV RIP supplied to BHEL 1.1% and 1.87% at PGCIL Balipara site AT 400 kV POWERGRID Balipara Bushing retested for C1 and C2 and test results are intact. Inspection call given to BHEL for routine tests witness. Production / Planning to arrange any box suitable for 145 kV 1250A 300 CT RIP Bushing repacking. Packing Box required. Service Testing Production 20.05.2024 11 1638 21/08/2023 Siemens Ltd 52 kV 6600 A 300 CT 28798 1 HC High Tan delta-C1-OIP Query from siemens for high tan delta at lower frequency 17 Hz is 0.59% and at 25 Hz is 0.46% 765 kV PGCIL Bhadla -II Rohan to sent follow up emails to customer and customer end on site testing is pending and siemens to share details with us. Rohan to sent follow email to customer Service 15.05.2024

25. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 List of open complaints with an ongoing action plan (Customer Prospective Open Complaints ) till date Sr No Service Call No Date of Complaint Customer Name Item details Serial Number No of Product Type Complaint Type Complaint Details Location Status Res. Dept Target Date 12 1289 11/01/2023 BHEL Bhopal 145 kV 1250A 500CT 22966 1 RIP Bushing failed / damaged incident Reported Observed black marks on oil end electrode support plate 765 kV Jhatikara PGCIL Inspection call given to BHEL and POWERGRID and customer end person nomination is pending. Planning add bushing packing case in plan which will require for sending back bushing to site Rohan Planning 25.05.2024 13 1147 18/10/2022 Bharat-Bhopal 145kV 1250A 500CT 22767 1 RIP Bushing failed / damaged incident Reported Observed black marks on oil end electrode support plate 765 kV SS Wardha PGCIL Inspection call given to BHEL and POWERGRID and customer end person nomination is pending. Planning add bushing packing case in plan which will require for sending back bushing to site Rohan Planning 25.05.2024 14 1285 06/01/2023 BHEL Bhopal 145 kV 1250A 500CT 22655 1 RIP Bushing failed / damaged incident Reported Electrode fall down in Reactor and observed black marks on electrode support plate 765 kV Aurangabad PGCIL Informed BHEL to provide PO for new bushing to take bushing into manufacturing plan Rohan Planning 25.05.2024 15 1822 29/02/2024 T&R 72.5 kV 2000A 300 CT 29078 1 OIP Oil leakage from bushing GETCO reported oil level not visible in bushing conservator indicator gauge and tan delta is high 10%. GTECO Talangpur Rohan sent email to T&R to send back bushing for analysis. Follow up email sent to customer. Customer end bushing awaited at our works Rohan 20.05.2024

26. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 List of open complaints with an ongoing action plan (Customer Prospective Open Complaints ) till date Sr No Service Call No Date of Complaint Customer Name Item details Serial Number No of Product Type Complaint Type Complaint Details Location Status Res. Dept Target Date 16 1737 07/12/2023 Voltamp 36kV 1250A 100CT 32622 1 OIP Test tap thread jam RIP new design Test tap cap not closing properly in RIP bushing 66kv Ishanpur substation, Ta.-Halvad, Dist - Morbi Y et to receive bushing from Voltamp at our works for female thread rework. As s strategy, we are not following with Voltamp as having old other customer open customer property work load. Service 25.05.2024 17 1840 11/03/2024 Atlanta 72.5 kV 800 A 100 CT 36360 1 OIP Mounting flange crack Customer reported crack in mounting flange during erection at site. GETCO Porbandan Rohan visited to site on 14.03.2024 and re-verified crack in flange. QA shared crack observation photos with Vendor for their views . Replacement bushing sent to customer and returned bushing from customer. Flange analysis at ERDA is going on and same to be taken on top priority QA Service 20.05.2024 18 1851 27/03/2024 Atlanta 72.5 kV 800 A 100 CT 36880, 36386,36355,36348 4 OIP Mounting flange crack Customer reported crack in flange of 72.5kV OIP bushing at GETCO Maheshwari Nadiad Ankaleshwar

27. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 List of open complaints with an ongoing action plan (Customer Prospective Open Complaints ) till date Sr No Service Call No Date of Complaint Customer Name Item details Serial Number No of Product Type Complaint Type Complaint Details Location Status Res. Dept Target Date 19 1872 17/04/2024 Bharat Heavy Electricals Ltd. - Bhopal 145kV 1250A 500CT 25087 , 25071 and 25092 3 RIP Electrode fixing arrangement related Inspection of bushing for electrode assembly, acetylene increased in reactor. 765/400/220kV Solapur Ss Rohan visited site and collated observation. Electrode support plate found fall down and hold on Winding lead. Customer replaced bushing by Passonivilla make bushing. Customer is asking for replacement of bushing Service Planning and Sales 30.05.2024 20 1875 23/04/2024 Kirloskar Electric Co. Ltd. - Mysore 72.5 kV 800 A 100 CT 31760 1 OIP Handling damage at customer end Top cover of bushing opened by customer and having oil leakage issue. at customer works TO support customer one bushing against open order send to customer and Customer will send back bushing for rectification and analysis. Yet to receive bushing from customer. 21 1880 29/04/2024 GETCO 72.5 kV 800 A 100 CT 24 OIP Test tap thread jam OIP- Old design Tan delta Cap jam in 24 bushings. 66/11 KV Ranasan, himatnagar, hajipur, dedhrota, hansalpur GETCO Request send to purchase team for spare test tap kit. Once spare kit received Shivam will visit to site Serivce 20.05.2024

28. Prepared By Rohan Pawar Verified By PM Yadav List of supplies made in Mar-2024 on FOC basis with (NRGP challan) generated in ERP which are approved by authority. MIS: Customer Complaints Apr-24 Challan No Challan date Customer Name Item code Details Qty (No) Cost (Rs) Approved by Remark N000000002 11/04/2024 Indo-Tech Transformers Limited YORNG0000142 SHAFT SEAL ID 58.2 X 70 X 4.5 / 7 1 145 NP/JT for customer support N000000003 15/04/2024 Voltamp Transformers Ltd. - Vadodara YARHA0000016 ARCING HORNS 145 kV 800 A OIP GAP 550~900 3 1584 DS Against order N000000006 26/04/2024 Electrotherm India Ltd (Transformer Division) YARHA0000001 ARCING HORNS 72.5 kV 1250 A OIP GAP 350~500 3 1098 DS Against order N000000007 29/04/2024 Delhi Transco Limited YTTAP0000026 TEST-TAP CAP 2 kV 2 582 PMY Against complaint N000000007 29/04/2024 Delhi Transco Limited YTTAP0000025 MULTI CONTACT 5 385 PMY Against complaint N000000007 29/04/2024 Delhi Transco Limited YNUT00000029 HEX NUT M4 5 65 PMY Against complaint N000000007 29/04/2024 Delhi Transco Limited YORNG0000105 FLUORO SILICON O RING ID 33 * CSD 2.5 mm 5 130 PMY Against complaint

29. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 List of supplies made in Mar-2024 on FOC basis with (RGP challan) generated in ERP which are approved by authority. Challan No Challan date Customer Name Item code Details Qty (No) Cost (Rs) Approved by Remark R000006708 10/04/2024 Atlanta Electrical Pvt. Ltd. YCDBS0000070 72.5 kV 800 A 100 CT 2 49000 NP/PMY Against complaint (Existing bushings are returned and challan closed in system) R000006716 13/04/2024 ECE Industries Ltd. YRCBS0000329 72.5 kV 1250 A 100 CT 2 420000 JT/DS For customer support (Existing bushings are returned and challan closed in system) R000006723 16/04/2024 Transformers & Rectifiers(India) Ltd YRSCB0000038 52 kV 3150 A 300 CT RIS 1 52000 NP/PMY Against complaint (Existing bushing is returned and challan closed in system) R000006725 17/04/2024 Bharat Heavy Electricals Ltd. - Bhopal YKITB0000253 ASSEMBLY KIT-253 145 kV Electrode Assembly 3 21000 NP/PMY Against complaint (Electrode supplied for reactor shutdown work which may take 3 months time to return existing electrode ) R000006725 17/04/2024 Bharat Heavy Electricals Ltd. - Bhopal YKITB0000243 SS 304 FASTENER KIT-243 145 kV Electrode 3 75 NP/PMY Against complaint (Electrode supplied for reactor shutdown work which may take 3 months time to return existing electrode ) R000006725 17/04/2024 Bharat Heavy Electricals Ltd. - Bhopal YMISC0000509 LOCTITE-542 1 620 NP/PMY Against complaint (Electrode supplied for reactor shutdown work which may take 3 months time to return existing electrode )

30. Prepared By Rohan Pawar Verified By PM Yadav Learning from the month Electrode and support plate related issue at POWERGRID site Inside tank of BHEL Reactor Sr. No 6008044 installed at Solapur having issue of arcing apart from electrode assembly. Collected photos of effected area and updated in ERP. Oil leakage from 72.5 kV 800A 100 CT OIP Bushing - Oil leakage observed between conservator and insulator - Need to identify leakage is due to Oring or due to hair crack in insulator MIS: Customer Complaints Apr-24

31. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 Site Visit in Apr-2024 Rohan visited T& R factory for RIS bushing checking Rohan visited Powergrid Solapur site for electrode related issue Vivek visited DTL Sanjay Gandhi site for tan delta cap related issue Shivam visited MPPTCL site for tan delta cap replacement Shivam visited GETCO Delwada site for checking of bushing Vivek visited MPPTCL Bhopal site for tan delta cap related issue

32. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 Repair works / activity carried out at YASH works for site returned product : Voltamp 02 Nos of 72.5 kV 800A 100 CT OIP Bushings 52 kV 3150A 300 CT RIP Bushing test tap step rework 145 kV 1250A 500 CT RIP BHEL/ Powergrid bushings repair work Inspection of 36 kV 12500A 0 CT HC bushings of Adani customer 02 Nos of 72.5 kV 800A 100 CT OIP Bushings received against RGP Challan no R000006708. After repair one bushing sent to Kirloskar against invoice and one bushing sent against Atlanta complaint from GETCO site for oil leakage

33. Prepared By Rohan Pawar Verified By PM Yadav MIS: Customer Complaints Apr-24 RCA and CAPA Open Sr No Customer Bushing Rating Bushing Sr No Complaint Details Report Status Target 1 Aditya Energy 72.5 kV 800A 100 CT RIP 32531 & 32467 Capacitance Increased Joint investigation with customer at our works for RCA 25.05.2024 2 Atlanta 72.5 kV 800A 100 CT OIP 36360, 36880, 36386,36355,36348 Crack line observed in flange Investigation to be taken on top property. Inside factory flange tightness test to be performed . Visit 3-4 sites for supervision of installation Visit Vendor Factory to checking flange casting process & verify batch report. Visit Atlanta factory for detailed discussion and collect information. 20.05.2024 3 BHEL-DTL-Gopalpur 72.5 kV 3150A 300 CT RIP 2116-1 &2116-3 Increased Capacitance in RIP bushings We are using these bushing for analyses of effect of heating above 150 Deg C and after this analysis we will take forward for core cutting & find out foil puncture 30.05.2024 4 T&R POWERGRID –Khetri 52 kV 3150A 300 CT RIP 22940 Test tap stem broken As advised by Amandeep ji at this we not required to submit RCA report. Bushing rectification of test tap stem re-soldering. As internal trail , load trail conducting on test tap stem. 15.05.2024 5 Atlanta 72.5 kV 800A 100 CT OIP 35125 Oil leakage Oil leakage from bushing near conservator area. 25.05.2024 6 Kirloskar Electric Co. Ltd. - Mysore 72.5 kV 800A 100 CT OIP 31760 Oil leakage Handling damage at customer end 25.5.2024

34. Prepared By Rohan Pawar Verified By PM Yadav Thank You