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B 31/10/2017 SECOND ISSUED FOR APPROVAL A 03/08/2017 FIRST ISSUED FOR APPROVAL REV DATE REVISIONS AND RECORD OF ISSUE Jaime Martinez Jaime Martinez Nolibert Eligan Nolibert Eligan Drew William Brian Skomsky Dave Wuethrick Dave Wuethrick PREPARED CHECKED REVIEWED APPROVED OWNER POWER GENERATION CORPORATION THERMAL POWER PROJECT MANAGEMENT BOARD OWNER’S ENGINEER POWER ENGINEERING CONSULTING JOINT STOCK COMPANY CONTRACTOR SUMITOMO CORPORATION SUB-CONTRACTOR ORIGINATOR DUYEN HAI EXTENSION THERMAL POWER PLANT PROJECT PROJECT NAME: Pre-Commissioning Method Statement SPEC NAME: CONTRACT No.： DH3EXT-25112014 SPEC No : 184824.88.3100 DOCUMENT TITLE: MS/ITP For Insulation Resistance Testing ORIGINATOR DOCUMENT NO.: Date: 30/10/2017 PROJECT DOCUMENT NO.: Rev.: B DH3E-ZEN-K-B&V-5504 DUYEN HAI EXTENSION THERMAL POWER PLANT PROJECT Table of Contents Contents Objective of Testing Important Notice .3 Definitions and Abbreviations Safety, Precaution and Limitations Information .4 Tools and Instruments Conditions to be Met Prior to Testing Method of Testing .5 DUYEN HAI EXTENSION THERMAL POWER PLANT PROJECT Objective of Testing To verify that insulation resistance is in suitable condition for energization of electrical equipment including MV/LV Cables, MCC, SUS, SWGR, Transformers, LV Distribution Boards and Bus Duct Important Notice 2.1 Notice to User: Commissioning must be carried out by a competent and appropriately trained and qualified engineer or technician experienced in commissioning of similar plant equipment Latest revision of documents used in this procedure, if it has been superseded the Originator of such document(s) should advise all parties for the relevant updating of this procedure Definitions and Abbreviations 1) MCC…….Motor Control 2) MV………Medium Voltage 3) LV……….Low Voltage 4) SUS…… Secondary Unit Substation 5) SWGR….Switchgear Safety, Precaution and Limitations 1) The work undertaken meets all the safety regulations promulgated by various Government Acts and documents compiled by Black & Veatch 2) For tests using voltage greater than 1000 V, barriers and warning signs shall be located to avoid personnel contact with energized components 3) Do not test solid state equipment Isolate this equipment prior to performance of this test 4) Provide barriers when necessary for personnel safety 5) If the equipment/cable under test cannot be seen end to end from the test station then personnel in direct communication with the test station must be positioned in such a manner that the equipment/cable can be monitored while BLACK & VEATCH | MS/ITP For Insulation Resistance Testing DUYEN HAI EXTENSION THERMAL POWER PLANT PROJECT energized to ensure personnel safety Information 5.1 Design Drawings 1) 5.2 ITPS 1) Equipment/Cable Single Line Diagrams as applicable DH3E-ZEN-K-B&V-5504, MS/ITP For Insulation Resistance Testing Tools and Instruments 1) Multi meter 2) Insulation Resistance Tester 3) Infrared Thermometer 4) All tools and instrument/equipment shall be calibrated Conditions to be Met Prior to Testing 1) Construction/Commissioning joint system walk-down has been completed and Commissioning has accepted the individual systems Relevant construction testing documentation has been reviewed and accepted 2) Personnel performing the work must verify that the equipment has been correctly installed in accordance with project drawings and specifications 3) All related equipment areas have been inspected and they are clean and safely accessible 4) Surge capacitors in general cause low insulation resistance values If possible, equipment protected by surge capacitors should be isolated prior to testing BLACK & VEATCH | MS/ITP For Insulation Resistance Testing DUYEN HAI EXTENSION THERMAL POWER PLANT PROJECT Method of Testing 8.1 Low and Medium Voltage Cables 1) JHA has been completed 2) Use a suitable voltage detector check for any potential on cable 3) Applicable project LockOut/TagOut procedures shall be followed when performing tests 4) Visually inspect for proper cable installation 5) Verify cable shield grounding is in accordance with project drawings For cable shield grounding not indicated on project drawings consult with the Engineer 6) Perform a continuity test on each conductor 7) Perform insulation resistance test for minute on each conductor with other conductors grounded Voltage testing levels are shown in Table 100.1 8) Record data on form CPPM-826 9) Discharge the cable by grounding all conductors for at least four times the duration of the test with a minimum duration of minutes 10) Acceptance criteria are shown in Table 100.1 8.2 SWGR/SUS/MCC/Panel Board 1) JHA has been completed 2) Use a suitable voltage detector SWGR/SUS/MCC/Panel Board bus 3) check for any potential on the Applicable project LockOut/TagOut procedures shall be followed when performing tests 4) SWGR/SUS/MCC/Panel Board should be tested from the load side of the main incomer breaker, switch, or transformer 5) Rack out all potential transformers or electrically isolate 6) Short and ground the secondary side of all current transformers 7) Metering transducers and other solid state devices are to be isolated before performing insulation testing 8) Perform insulation resistance for minute on each phase with the remaining phases to ground Voltage testing levels are shown in Table 100.1 9) Record data on form CPPM-826 BLACK & VEATCH | MS/ITP For Insulation Resistance Testing DUYEN HAI EXTENSION THERMAL POWER PLANT PROJECT 10) Acceptance Criteria are shown in Table 100.1 11) Following testing discharge the equipment by grounding all conductors for at least four times the duration of the test with a minimum duration of minutes 12) Restore the SWGR/SUS/MCC/Panel Board to the pre-test condition 8.3 Bus Duct 1) JHA has been completed 2) Use a suitable voltage detector check for any potential on the Bus Duct 3) Applicable project LockOut/TagOut procedures shall be followed when performing tests 4) Verify that the bus enclosure is properly grounded according to project drawings 5) Verify heaters are installed and operating as required 6) Verify the Bus and Bus Duct are clean and ready to support energization 7) Verify proper phasing at each termination 8) Perform insulation resistance for minute on each phase of the bus duct with the remaining phases to ground Voltage testing levels are shown in Table 100.1 9) Record data on form CPPM-826 10) Acceptance Criteria are shown in Table 100.1 11) After testing discharge the Bus Duct by grounding all conductors for at least four times the duration of the test with a minimum duration of minutes 8.4 Power Transformers 1) JHA has been completed 2) Use a suitable voltage detector check for any potential on the Transformer 3) Applicable project LockOut/TagOut procedures shall be followed when performing tests 4) On two winding transformers perform insulation resistance test for minute BLACK & VEATCH | MS/ITP For Insulation Resistance Testing DUYEN HAI EXTENSION THERMAL POWER PLANT PROJECT according following sequence: 5) High to Low Winding and Ground Low to High Winding and Ground High and Low Winding to Ground On three winding transformers perform insulation resistance test for minute according following sequence: High to Low , Tertiary and Ground Low to High, Tertiary and Ground Tertiary to High, Low and Ground High and Low to Tertiary and Ground High and Tertiary to Low and Ground Low and Tertiary to High and Ground High, Low, and Tertiary to ground 6) Voltage testing levels are shown in Table 100.1 7) Record data on form CPPM-826 8) Acceptance Criteria are shown in Table 100.1 9) After testing discharge the transformer by grounding all windings for at least four times the duration of the test with a minimum duration of minutes BLACK & VEATCH | MS/ITP For Insulation Resistance Testing DUYEN HAI EXTENSION THERMAL POWER PLANT PROJECT BLACK & VEATCH | MS/ITP For Insulation Resistance Testing ... LockOut/TagOut procedures shall be followed when performing tests 4) On two winding transformers perform insulation resistance test for minute BLACK & VEATCH | MS/ITP For Insulation Resistance Testing... SWGR/SUS/MCC/Panel Board bus 3) check for any potential on the Applicable project LockOut/TagOut procedures shall be followed when performing tests 4) SWGR/SUS/MCC/Panel Board should be tested from the load... Single Line Diagrams as applicable DH3E- ZEN- K- B&V-5504, MS/ITP For Insulation Resistance Testing Tools and Instruments 1) Multi meter 2) Insulation Resistance Tester 3) Infrared Thermometer 4)